sqlserver 表达式函数测试

Docs/expression.md

@@ -15,110 +15,110 @@
 | 表达式 | MySql | SqlServer | PostgreSQL | 功能说明 |
 | - | - | - | - | - |
 | string.Empty | '' | '' | '' | 空字符串表示 |
-| a.CompareTo(b) | a - b | - | - | 比较a和b大小 |
+| a.CompareTo(b) | strcmp(a, b) | - | - | 比较a和b大小 |
-| a.Contains('b') | a like '%b%' | - | - | a是否包含b |
+| a.Contains('b') | a like '%b%' | a like '%b%' | - | a是否包含b |
-| a.EndsWith('b') | a like '%b' | - | - | a尾部是否包含b |
+| a.EndsWith('b') | a like '%b' | a like '%b' | - | a尾部是否包含b |
-| a.IndexOf(b) | locate(a, b) - 1 | - | - | 查找a中出现b的位置 |
+| a.IndexOf(b) | locate(a, b) - 1 | locate(a, b) - 1 | - | 查找a中出现b的位置 |
-| a.Length | char_length(a) | - | - | 返回a的字符串长度 |
+| a.Length | char_length(a) | len(a) | - | 返回a的字符串长度 |
 | a.PadLeft(b, c) | lpad(a, b, c) | - | - | 在a的左侧充字符c，直到字符串长度大于b |
 | a.PadRight(b, c) | rpad(a, b, c) | - | - | 在a的右侧充字符c，直到字符串长度大于b |
-| a.Replace(b, c) | replace(a, b, c) | - | - | 将a中字符串b，替换成c |
+| a.Replace(b, c) | replace(a, b, c) | replace(a, b, c) | - | 将a中字符串b，替换成c |
-| a.StartsWith('b') | a like 'b%' | - | - | a头部是否包含b |
+| a.StartsWith('b') | a like 'b%' | a like 'b%' | - | a头部是否包含b |
-| a.Substring(b, c) | substr(a, b, c) | - | - | 截取a中位置b到c的内容 |
+| a.Substring(b, c) | substr(a, b, c) | substring(a, b, c) | - | 截取a中位置b到c的内容 |
-| a.ToLower | lower(a) | - | - | 转小写 |
+| a.ToLower | lower(a) | lower(a) | - | 转小写 |
-| a.ToUpper | upper(a) | - | - | 转大写 |
+| a.ToUpper | upper(a) | upper(a) | - | 转大写 |
-| a.Trim | trim(a) | - | - | 移除两边字符 |
+| a.Trim | trim(a) | trim(a) | - | 移除两边字符 |
-| a.TrimEnd | rtrim(a) | - | - | 移除左侧指定字符 |
+| a.TrimEnd | rtrim(a) | rtrim(a) | - | 移除左侧指定字符 |
-| a.TrimStart | ltrim(a) | - | - | 移除右侧指定字符 |
+| a.TrimStart | ltrim(a) | ltrim(a) | - | 移除右侧指定字符 |
 
 ### 日期对象
 | 表达式 | MySql | SqlServer | PostgreSQL | 功能说明 |
 | - | - | - | - | - |
-| DateTime.Now | now() | - | - | 取本地时间 |
+| DateTime.Now | now() | getdate() | - | 取本地时间 |
-| DateTime.UtcNow | utc_timestamp() | - | - | 取UTC时间 |
+| DateTime.UtcNow | utc_timestamp() | getutcdate() | - | 取UTC时间 |
-| DateTime.Today | curdate | - | - | 取本地时间，日期部分 |
+| DateTime.Today | curdate | convert(char(10),getdate(),120) | - | 取本地时间，日期部分 |
-| DateTime.MaxValue | cast('9999/12/31 23:59:59' as datetime) | - | - | 最大时间 |
+| DateTime.MaxValue | cast('9999/12/31 23:59:59' as datetime) | '1753/1/1 0:00:00' | - | 最大时间 |
-| DateTime.MinValue | cast('0001/1/1 0:00:00' as datetime) | - | - | 最小时间 |
+| DateTime.MinValue | cast('0001/1/1 0:00:00' as datetime) | '9999/12/31 23:59:59' | - | 最小时间 |
-| DateTime.Compare(a, b) | a - b | - | - | 比较a和b的大小 |
+| DateTime.Compare(a, b) | a - b | a - b | - | 比较a和b的大小 |
-| DateTime.DaysInMonth(a, b) | dayofmonth(last_day(concat(a, '-', b, '-1'))) | - | - | 取指定年月份的总天数 |
+| DateTime.DaysInMonth(a, b) | dayofmonth(last_day(concat(a, '-', b, '-1'))) | datepart(day, dateadd(day, -1, dateadd(month, 1, cast(a as varchar) + '-' + cast(b as varchar) + '-1'))) | - | 取指定年月份的总天数 |
-| DateTime.Equals(a, b) | a = b | - | - | 比较a和b相等 |
+| DateTime.Equals(a, b) | a = b | a = b | - | 比较a和b相等 |
-| DateTime.IsLeapYear(a) | a%4=0 and a%100<>0 or a%400=0 | - | - | 判断闰年 |
+| DateTime.IsLeapYear(a) | a%4=0 and a%100<>0 or a%400=0 | a%4=0 and a%100<>0 or a%400=0 | - | 判断闰年 |
-| DateTime.Parse(a) | cast(a as datetime) | - | - | 转换日期类型 |
+| DateTime.Parse(a) | cast(a as datetime) | cast(a as datetime) | - | 转换日期类型 |
-| a.Add(b) | date_add(a, interval b microsecond) | - | - | 增加TimeSpan值 |
+| a.Add(b) | date_add(a, interval b microsecond) | dateadd(millisecond, b / 1000, a) | - | 增加TimeSpan值 |
-| a.AddDays(b) | date_add(a, interval b day) | - | - | 增加天数 |
+| a.AddDays(b) | date_add(a, interval b day) | dateadd(day, b, a) | - | 增加天数 |
-| a.AddHours(b) | date_add(a, interval b hour) | - | - | 增加小时 |
+| a.AddHours(b) | date_add(a, interval b hour) | dateadd(hour, b, a) | - | 增加小时 |
-| a.AddMilliseconds(b) | date_add(a, interval b*1000 microsecond) | - | - | 增加毫秒 |
+| a.AddMilliseconds(b) | date_add(a, interval b*1000 microsecond) | dateadd(millisecond, b, a) | - | 增加毫秒 |
-| a.AddMinutes(b) | date_add(a, interval b minute) | - | - | 增加分钟 |
+| a.AddMinutes(b) | date_add(a, interval b minute) | dateadd(minute, b, a) | - | 增加分钟 |
-| a.AddMonths(b) | date_add(a, interval b month) | - | - | 增加月 |
+| a.AddMonths(b) | date_add(a, interval b month) | dateadd(month, b, a) | - | 增加月 |
-| a.AddSeconds(b) | date_add(a, interval b second) | - | - | 增加秒 |
+| a.AddSeconds(b) | date_add(a, interval b second) | dateadd(second, b, a) | - | 增加秒 |
-| a.AddTicks(b) | date_add(a, interval b/10 microsecond) | - | - | 增加刻度，微秒的1/10 |
+| a.AddTicks(b) | date_add(a, interval b/10 microsecond) | dateadd(millisecond, b / 10000, a) | - | 增加刻度，微秒的1/10 |
-| a.AddYears(b) | date_add(a, interval b year) | - | - | 增加年 |
+| a.AddYears(b) | date_add(a, interval b year) | dateadd(year, b, a) | - | 增加年 |
-| a.Date | cast(date_format(a, '%Y-%m-%d') as datetime) | - | - | 获取a的日期部分 |
+| a.Date | cast(date_format(a, '%Y-%m-%d') as datetime) | convert(char(10),a,120) | - | 获取a的日期部分 |
-| a.Day | dayofmonth(a) | - | - | 获取a在月的第几天 |
+| a.Day | dayofmonth(a) | datepart(day, a) | - | 获取a在月的第几天 |
-| a.DayOfWeek | dayofweek(a) | - | - | 获取a在周的第几天 |
+| a.DayOfWeek | dayofweek(a) | datepart(weekday, a) - 1 | - | 获取a在周的第几天 |
-| a.DayOfYear | dayofyear(a) | - | - | 获取a在年的第几天 |
+| a.DayOfYear | dayofyear(a) | datepart(dayofyear, a) | - | 获取a在年的第几天 |
-| a.Hour | hour(a) | - | - | 小时 |
+| a.Hour | hour(a) | datepart(hour, a) | - | 小时 |
-| a.Millisecond | floor(microsecond(a) / 1000) | - | - | 毫秒 |
+| a.Millisecond | floor(microsecond(a) / 1000) | datepart(millisecond, a) | - | 毫秒 |
-| a.Minute | minute(a) | - | - | 分钟 |
+| a.Minute | minute(a) | datepart(minute, a) | - | 分钟 |
-| a.Month | month(a) | - | - | 月 |
+| a.Month | month(a) | datepart(month, a) | - | 月 |
-| a.Second | second(a) | - | - | 秒 |
+| a.Second | second(a) | datepart(second, a) | - | 秒 |
-| a.Subtract(b) | (time_to_sec(a) - time_to_sec(b)) * 1000000 + microsecond(a) - microsecond(b) | - | - | 将a的值和b相减 |
+| a.Subtract(b) | timestampdiff(microsecond, b, a) | datediff(millisecond, b, a) * 1000 | - | 将a的值和b相减 |
-| a.Ticks | time_to_sec(a) * 10000000 + microsecond(a) * 10 + 62135596800000000 | - | - | 刻度总数 |
+| a.Ticks | timestampdiff(microsecond, '1970-1-1', a) * 10 + 621355968000000000 | datediff(millisecond, '1970-1-1', a) * 10000 + 621355968000000000 | - | 刻度总数 |
-| a.TimeOfDay | time_to_sec(date_format(a, '1970-1-1 %H:%i:%s.%f')) * 1000000 + microsecond(a) + 6213559680000000 | - | - | 获取a的时间部分 |
+| a.TimeOfDay | timestampdiff(microsecond, date_format(a, '1970-1-1 %H:%i:%s.%f'), a) + 62135596800000000 | '1970-1-1 ' + convert(varchar, a, 14) | - | 获取a的时间部分 |
-| a.Year | year(a) | - | - | 年 |
+| a.Year | year(a) | datepart(year, a) | - | 年 |
-| a.Equals(b) | a = b | - | - | 比较a和b相等 |
+| a.Equals(b) | a = b | a = b | - | 比较a和b相等 |
-| a.CompareTo(b) | a - b | - | - | 比较a和b大小 |
+| a.CompareTo(b) | a - b | a - b | - | 比较a和b大小 |
-| a.ToString() | date_format(a, '%Y-%m-%d %H:%i:%s.%f') | - | - | 转换字符串 |
+| a.ToString() | date_format(a, '%Y-%m-%d %H:%i:%s.%f') | convert(varchar, a, 121) | - | 转换字符串 |
 
 ### 时间对象
 | 表达式 | MySql | SqlServer | PostgreSQL | 功能说明 |
 | - | - | - | - | - |
-| TimeSpan.Zero | 0 | - | - | 0微秒 |
+| TimeSpan.Zero | 0 | 0 | - | 0微秒 |
-| TimeSpan.MaxValue | 922337203685477580 | - | - | 最大微秒时间 |
+| TimeSpan.MaxValue | 922337203685477580 | 922337203685477580 | - | 最大微秒时间 |
-| TimeSpan.MinValue | -922337203685477580 | - | - | 最小微秒时间 |
+| TimeSpan.MinValue | -922337203685477580 | -922337203685477580 | - | 最小微秒时间 |
-| TimeSpan.Compare(a, b) | a - b | - | - | 比较a和b的大小 |
+| TimeSpan.Compare(a, b) | a - b | a - b | - | 比较a和b的大小 |
-| TimeSpan.Equals(a, b) | a = b | - | - | 比较a和b相等 |
+| TimeSpan.Equals(a, b) | a = b | a = b | - | 比较a和b相等 |
-| TimeSpan.FromDays(a) | a * 1000000 * 60 * 60 * 24 | - | - | a天的微秒值 |
+| TimeSpan.FromDays(a) | a * 1000000 * 60 * 60 * 24 | a * 1000000 * 60 * 60 * 24 | - | a天的微秒值 |
-| TimeSpan.FromHours(a) | a * 1000000 * 60 * 60 | - | - | a小时的微秒值 |
+| TimeSpan.FromHours(a) | a * 1000000 * 60 * 60 | a * 1000000 * 60 * 60 | - | a小时的微秒值 |
-| TimeSpan.FromMilliseconds(a) | a * 1000 | - | - | a毫秒的微秒值 |
+| TimeSpan.FromMilliseconds(a) | a * 1000 | a * 1000 | - | a毫秒的微秒值 |
-| TimeSpan.FromMinutes(a) | a * 1000000 * 60 | - | - | a分钟的微秒值 |
+| TimeSpan.FromMinutes(a) | a * 1000000 * 60 | a * 1000000 * 60 | - | a分钟的微秒值 |
-| TimeSpan.FromSeconds(a) | a * 1000000 | - | - | a秒钟的微秒值 |
+| TimeSpan.FromSeconds(a) | a * 1000000 | a * 1000000 | - | a秒钟的微秒值 |
-| TimeSpan.FromTicks(a) | a / 10 | - | - | a刻度的毫秒值 |
+| TimeSpan.FromTicks(a) | a / 10 | a / 10 | - | a刻度的毫秒值 |
-| a.Add(b) | a + b | - | - | 增加值 |
+| a.Add(b) | a + b | a + b | - | 增加值 |
-| a.Subtract(b) | a - b | - | - | 将a的值和b相减 |
+| a.Subtract(b) | a - b | a - b | - | 将a的值和b相减 |
-| a.CompareTo(b) | a - b | - | - | 比较a和b大小 |
+| a.CompareTo(b) | a - b | a - b | - | 比较a和b大小 |
-| a.Days | a div (1000000 * 60 * 60 * 24) | - | - | 天数部分 |
+| a.Days | a div (1000000 * 60 * 60 * 24) | a div (1000000 * 60 * 60 * 24) | - | 天数部分 |
-| a.Hours | a div (1000000 * 60 * 60) mod 24 | - | - | 小时部分 |
+| a.Hours | a div (1000000 * 60 * 60) mod 24 | a div (1000000 * 60 * 60) mod 24 | - | 小时部分 |
-| a.Milliseconds | a div 1000 mod 1000 | - | - | 毫秒部分 |
+| a.Milliseconds | a div 1000 mod 1000 | a div 1000 mod 1000 | - | 毫秒部分 |
-| a.Seconds | a div 1000000 mod 60 | - | - | 秒数部分 |
+| a.Seconds | a div 1000000 mod 60 | a div 1000000 mod 60 | - | 秒数部分 |
-| a.Ticks | a * 10 | - | - | 刻度总数 |
+| a.Ticks | a * 10 | a * 10 | - | 刻度总数 |
-| a.TotalDays | a / (1000000 * 60 * 60 * 24) | - | - | 总天数(含小数) |
+| a.TotalDays | a / (1000000 * 60 * 60 * 24) | a / (1000000 * 60 * 60 * 24) | - | 总天数(含小数) |
-| a.TotalHours | a / (1000000 * 60 * 60) | - | - | 总小时(含小数) |
+| a.TotalHours | a / (1000000 * 60 * 60) | a / (1000000 * 60 * 60) | - | 总小时(含小数) |
-| a.TotalMilliseconds | a / 1000 | - | - | 总毫秒(含小数) |
+| a.TotalMilliseconds | a / 1000 | a / 1000 | - | 总毫秒(含小数) |
-| a.TotalMinutes | a / (1000000 * 60) | - | - | 总分钟(含小数) |
+| a.TotalMinutes | a / (1000000 * 60) | a / (1000000 * 60) | - | 总分钟(含小数) |
-| a.TotalSeconds | a / 1000000 | - | - | 总秒数(含小数) |
+| a.TotalSeconds | a / 1000000 | a / 1000000 | - | 总秒数(含小数) |
-| a.Equals(b) | a = b | - | - | 比较a和b相等 |
+| a.Equals(b) | a = b | a = b | - | 比较a和b相等 |
-| a.ToString() |  | - | - | 转换字符串 |
+| a.ToString() | cast(a as varchar) | cast(a as varchar) | - | 转换字符串 |
 
 ### 数学函数
 | 表达式 | MySql | SqlServer | PostgreSQL | 功能说明 |
 | - | - | - | - | - |
-| Math.Abs(a) | abs(a) | - | - | - |
+| Math.Abs(a) | abs(a) | abs(a) | - | - |
-| Math.Acos(a) | acos(a) | - | - | - |
+| Math.Acos(a) | acos(a) | acos(a) | - | - |
-| Math.Asin(a) | asin(a) | - | - | - |
+| Math.Asin(a) | asin(a) | asin(a) | - | - |
-| Math.Atan(a) | atan(a) | - | - | - |
+| Math.Atan(a) | atan(a) | atan(a) | - | - |
-| Math.Atan2(a, b) | atan2(a, b) | - | - | - |
+| Math.Atan2(a, b) | atan2(a, b) | atan2(a, b) | - | - |
-| Math.Ceiling(a) | ceiling(a) | - | - | - |
+| Math.Ceiling(a) | ceiling(a) | ceiling(a) | - | - |
-| Math.Cos(a) | cos(a) | - | - | - |
+| Math.Cos(a) | cos(a) | cos(a) | - | - |
-| Math.Exp(a) | exp(a) | - | - | - |
+| Math.Exp(a) | exp(a) | exp(a) | - | - |
-| Math.Floor(a) | floor(a) | - | - | - |
+| Math.Floor(a) | floor(a) | floor(a) | - | - |
-| Math.Log(a) | log(a) | - | - | - |
+| Math.Log(a) | log(a) | log(a) | - | - |
-| Math.Log10(a) | log10(a) | - | - | - |
+| Math.Log10(a) | log10(a) | log10(a) | - | - |
-| Math.PI(a) | 3.1415926535897931 | - | - | - |
+| Math.PI(a) | 3.1415926535897931 | 3.1415926535897931 | - | - |
-| Math.Pow(a, b) | pow(a, b) | - | - | - |
+| Math.Pow(a, b) | pow(a, b) | power(a, b) | - | - |
-| Math.Round(a, b) | round(a, b) | - | - | - |
+| Math.Round(a, b) | round(a, b) | round(a, b) | - | - |
-| Math.Sign(a) | sign(a) | - | - | - |
+| Math.Sign(a) | sign(a) | sign(a) | - | - |
-| Math.Sin(a) | sin(a) | - | - | - |
+| Math.Sin(a) | sin(a) | sin(a) | - | - |
-| Math.Sqrt(a) | sqrt(a) | - | - | - |
+| Math.Sqrt(a) | sqrt(a) | sqrt(a) | - | - |
-| Math.Tan(a) | tan(a) | - | - | - |
+| Math.Tan(a) | tan(a) | tan(a) | - | - |
-| Math.Truncate(a) | truncate(a, 0) | - | - | - |
+| Math.Truncate(a) | truncate(a, 0) | floor(a) | - | - |

FreeSql.Tests/MySql/MySqlExpression/DateTimeTest.cs

@@ -89,15 +89,15 @@ namespace FreeSql.Tests.MySqlExpression {
 			data.Add(select.Where(a => DateTime.Now.Subtract(a.Type.Parent.Time2.Date).TotalSeconds > 0).ToList());
 			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
 			//FROM `tb_topic111333` a 
-			//WHERE (((((time_to_sec(now()) - time_to_sec(cast(date_format(a.`CreateTime`, '%Y-%m-%d') as datetime))) * 1000000 + microsecond(now()) - microsecond(cast(date_format(a.`CreateTime`, '%Y-%m-%d') as datetime)))) / 1000000) > 0);
+			//WHERE (((timestampdiff(microsecond, cast(date_format(a.`CreateTime`, '%Y-%m-%d') as datetime), now())) / 1000000) > 0);
 
 			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a__Type.`Time` as7, a.`Title` as8, a.`CreateTime` as9 
 			//FROM `tb_topic111333` a, `TestTypeInfo333` a__Type 
-			//WHERE (((((time_to_sec(now()) - time_to_sec(cast(date_format(a__Type.`Time`, '%Y-%m-%d') as datetime))) * 1000000 + microsecond(now()) - microsecond(cast(date_format(a__Type.`Time`, '%Y-%m-%d') as datetime)))) / 1000000) > 0);
+			//WHERE (((timestampdiff(microsecond, cast(date_format(a__Type.`Time`, '%Y-%m-%d') as datetime), now())) / 1000000) > 0);
 
 			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a__Type.`Time` as7, a.`Title` as8, a.`CreateTime` as9 
 			//FROM `tb_topic111333` a, `TestTypeInfo333` a__Type, `TestTypeParentInfo23123` a__Type__Parent 
-			//WHERE (((((time_to_sec(now()) - time_to_sec(cast(date_format(a__Type__Parent.`Time2`, '%Y-%m-%d') as datetime))) * 1000000 + microsecond(now()) - microsecond(cast(date_format(a__Type__Parent.`Time2`, '%Y-%m-%d') as datetime)))) / 1000000) > 0)
+			//WHERE (((timestampdiff(microsecond, cast(date_format(a__Type__Parent.`Time2`, '%Y-%m-%d') as datetime), now())) / 1000000) > 0)
 		}
 		[Fact]
 		public void TimeOfDay() {
@@ -107,15 +107,15 @@ namespace FreeSql.Tests.MySqlExpression {
 			data.Add(select.Where(a => a.Type.Parent.Time2.TimeOfDay > DateTime.Now.TimeOfDay).ToList());
 			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
 			//FROM `tb_topic111333` a 
-			//WHERE ((time_to_sec(a.`CreateTime`) * 1000000 + microsecond(a.`CreateTime`) + 6213559680000000) = (time_to_sec(now()) * 1000000 + microsecond(now()) + 6213559680000000));
+			//WHERE ((timestampdiff(microsecond, date_format(a.`CreateTime`, '1970-1-1 %H:%i:%s.%f'), a.`CreateTime`) + 62135596800000000) = (timestampdiff(microsecond, date_format(now(), '1970-1-1 %H:%i:%s.%f'), now()) + 62135596800000000));
 
 			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a__Type.`Time` as7, a.`Title` as8, a.`CreateTime` as9 
 			//FROM `tb_topic111333` a, `TestTypeInfo333` a__Type 
-			//WHERE ((time_to_sec(a__Type.`Time`) * 1000000 + microsecond(a__Type.`Time`) + 6213559680000000) > (time_to_sec(now()) * 1000000 + microsecond(now()) + 6213559680000000));
+			//WHERE ((timestampdiff(microsecond, date_format(a__Type.`Time`, '1970-1-1 %H:%i:%s.%f'), a__Type.`Time`) + 62135596800000000) > (timestampdiff(microsecond, date_format(now(), '1970-1-1 %H:%i:%s.%f'), now()) + 62135596800000000));
 
 			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a__Type.`Time` as7, a.`Title` as8, a.`CreateTime` as9 
 			//FROM `tb_topic111333` a, `TestTypeInfo333` a__Type, `TestTypeParentInfo23123` a__Type__Parent 
-			//WHERE ((time_to_sec(a__Type__Parent.`Time2`) * 1000000 + microsecond(a__Type__Parent.`Time2`) + 6213559680000000) > (time_to_sec(now()) * 1000000 + microsecond(now()) + 6213559680000000))
+			//WHERE ((timestampdiff(microsecond, date_format(a__Type__Parent.`Time2`, '1970-1-1 %H:%i:%s.%f'), a__Type__Parent.`Time2`) + 62135596800000000) > (timestampdiff(microsecond, date_format(now(), '1970-1-1 %H:%i:%s.%f'), now()) + 62135596800000000))
 		}
 		[Fact]
 		public void DayOfWeek() {
@@ -287,15 +287,15 @@ namespace FreeSql.Tests.MySqlExpression {
 			data.Add(select.Where(a => a.Type.Parent.Time2.Ticks > DateTime.Now.Ticks).ToList());
 			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
 			//FROM `tb_topic111333` a 
-			//WHERE ((time_to_sec(a.`CreateTime`) * 10000000 + microsecond(a.`CreateTime`) * 10 + 62135596800000000) > (time_to_sec(now()) * 10000000 + microsecond(now()) * 10 + 62135596800000000));
+			//WHERE ((timestampdiff(microsecond, '1970-1-1', a.`CreateTime`) * 10 + 621355968000000000) > (timestampdiff(microsecond, '1970-1-1', now()) * 10 + 621355968000000000));
 
 			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a__Type.`Time` as7, a.`Title` as8, a.`CreateTime` as9 
 			//FROM `tb_topic111333` a, `TestTypeInfo333` a__Type 
-			//WHERE ((time_to_sec(a__Type.`Time`) * 10000000 + microsecond(a__Type.`Time`) * 10 + 62135596800000000) > (time_to_sec(now()) * 10000000 + microsecond(now()) * 10 + 62135596800000000));
+			//WHERE ((timestampdiff(microsecond, '1970-1-1', a__Type.`Time`) * 10 + 621355968000000000) > (timestampdiff(microsecond, '1970-1-1', now()) * 10 + 621355968000000000));
 
 			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a__Type.`Time` as7, a.`Title` as8, a.`CreateTime` as9 
 			//FROM `tb_topic111333` a, `TestTypeInfo333` a__Type, `TestTypeParentInfo23123` a__Type__Parent 
-			//WHERE ((time_to_sec(a__Type__Parent.`Time2`) * 10000000 + microsecond(a__Type__Parent.`Time2`) * 10 + 62135596800000000) > (time_to_sec(now()) * 10000000 + microsecond(now()) * 10 + 62135596800000000))
+			//WHERE ((timestampdiff(microsecond, '1970-1-1', a__Type__Parent.`Time2`) * 10 + 621355968000000000) > (timestampdiff(microsecond, '1970-1-1', now()) * 10 + 621355968000000000))
 		}
 		[Fact]
 		public void Add() {
@@ -467,15 +467,15 @@ namespace FreeSql.Tests.MySqlExpression {
 			data.Add(select.Where(a => a.Type.Parent.Time2.Subtract(DateTime.Now).TotalSeconds > 0).ToList());
 			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
 			//FROM `tb_topic111333` a 
-			//WHERE (((((time_to_sec(a.`CreateTime`) - time_to_sec(now())) * 1000000 + microsecond(a.`CreateTime`) - microsecond(now()))) / 1000000) > 0);
+			//WHERE (((timestampdiff(microsecond, now(), a.`CreateTime`)) / 1000000) > 0);
 
 			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a__Type.`Time` as7, a.`Title` as8, a.`CreateTime` as9 
 			//FROM `tb_topic111333` a, `TestTypeInfo333` a__Type 
-			//WHERE (((((time_to_sec(a__Type.`Time`) - time_to_sec(now())) * 1000000 + microsecond(a__Type.`Time`) - microsecond(now()))) / 1000000) > 0);
+			//WHERE (((timestampdiff(microsecond, now(), a__Type.`Time`)) / 1000000) > 0);
 
 			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a__Type.`Time` as7, a.`Title` as8, a.`CreateTime` as9 
 			//FROM `tb_topic111333` a, `TestTypeInfo333` a__Type, `TestTypeParentInfo23123` a__Type__Parent 
-			//WHERE (((((time_to_sec(a__Type__Parent.`Time2`) - time_to_sec(now())) * 1000000 + microsecond(a__Type__Parent.`Time2`) - microsecond(now()))) / 1000000) > 0);
+			//WHERE (((timestampdiff(microsecond, now(), a__Type__Parent.`Time2`)) / 1000000) > 0);
 			data.Add(select.Where(a => a.CreateTime.Subtract(TimeSpan.FromDays(1)) > a.CreateTime).ToList());
 			data.Add(select.Where(a => a.Type.Time.Subtract(TimeSpan.FromDays(1)) > a.CreateTime).ToList());
 			data.Add(select.Where(a => a.Type.Parent.Time2.Subtract(TimeSpan.FromDays(1)) > a.CreateTime).ToList());

FreeSql.Tests/MySql/MySqlExpression/TimeSpanTest.cs

@@ -37,7 +37,7 @@ namespace FreeSql.Tests.MySqlExpression {
 			data.Add(select.Where(a => a.CreateTime.TimeOfDay > TimeSpan.Zero).ToList());
 			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
 			//FROM `tb_topic` a 
-			//WHERE ((time_to_sec(date_format(a.`CreateTime`, '1970-1-1 %H:%i:%s.%f')) * 1000000 + microsecond(a.`CreateTime`) + 6213559680000000) > 0)
+			//WHERE (timestampdiff(microsecond, date_format(a.`CreateTime`, '1970-1-1 %H:%i:%s.%f'), a.`CreateTime`) + 62135596800000000) > 0)
 		}
 		[Fact]
 		public void MinValue() {
@@ -45,7 +45,7 @@ namespace FreeSql.Tests.MySqlExpression {
 			data.Add(select.Where(a => a.CreateTime.TimeOfDay > TimeSpan.MinValue).ToList());
 			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
 			//FROM `tb_topic` a 
-			//WHERE ((time_to_sec(date_format(a.`CreateTime`, '1970-1-1 %H:%i:%s.%f')) * 1000000 + microsecond(a.`CreateTime`) + 6213559680000000) > -922337203685477580)
+			//WHERE (timestampdiff(microsecond, date_format(a.`CreateTime`, '1970-1-1 %H:%i:%s.%f'), a.`CreateTime`) + 62135596800000000) > -922337203685477580)
 		}
 		[Fact]
 		public void MaxValue() {
@@ -53,7 +53,7 @@ namespace FreeSql.Tests.MySqlExpression {
 			data.Add(select.Where(a => a.CreateTime.TimeOfDay < TimeSpan.MaxValue).ToList());
 			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
 			//FROM `tb_topic` a 
-			//WHERE ((time_to_sec(date_format(a.`CreateTime`, '1970-1-1 %H:%i:%s.%f')) * 1000000 + microsecond(a.`CreateTime`) + 6213559680000000) < 922337203685477580)
+			//WHERE (timestampdiff(microsecond, date_format(a.`CreateTime`, '1970-1-1 %H:%i:%s.%f'), a.`CreateTime`) + 62135596800000000) < 922337203685477580)
 		}
 		[Fact]
 		public void Days() {
@@ -61,7 +61,7 @@ namespace FreeSql.Tests.MySqlExpression {
 			data.Add(select.Where(a => a.CreateTime.TimeOfDay.Days == 0).ToList());
 			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
 			//FROM `tb_topic` a 
-			//WHERE ((((time_to_sec(date_format(a.`CreateTime`, '1970-1-1 %H:%i:%s.%f')) * 1000000 + microsecond(a.`CreateTime`) + 6213559680000000)) div 86400000000) = 0)
+			//WHERE (((timestampdiff(microsecond, date_format(a.`CreateTime`, '1970-1-1 %H:%i:%s.%f'), a.`CreateTime`) + 62135596800000000)) div 86400000000) = 0)
 		}
 		[Fact]
 		public void Hours() {
@@ -69,7 +69,7 @@ namespace FreeSql.Tests.MySqlExpression {
 			data.Add(select.Where(a => a.CreateTime.TimeOfDay.Hours > 0).ToSql());
 			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
 			//FROM `tb_topic` a 
-			//WHERE ((((time_to_sec(date_format(a.`CreateTime`, '1970-1-1 %H:%i:%s.%f')) * 1000000 + microsecond(a.`CreateTime`) + 6213559680000000)) div 3600000000) mod 24 > 0)
+			//WHERE (((timestampdiff(microsecond, date_format(a.`CreateTime`, '1970-1-1 %H:%i:%s.%f'), a.`CreateTime`) + 62135596800000000)) div 3600000000) mod 24 > 0)
 		}
 		[Fact]
 		public void Milliseconds() {
@@ -77,7 +77,7 @@ namespace FreeSql.Tests.MySqlExpression {
 			data.Add(select.Where(a => a.CreateTime.TimeOfDay.Milliseconds > 0).ToList());
 			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
 			//FROM `tb_topic` a 
-			//WHERE ((((time_to_sec(date_format(a.`CreateTime`, '1970-1-1 %H:%i:%s.%f')) * 1000000 + microsecond(a.`CreateTime`) + 6213559680000000)) div 1000 mod 1000) > 0)
+			//WHERE (((timestampdiff(microsecond, date_format(a.`CreateTime`, '1970-1-1 %H:%i:%s.%f'), a.`CreateTime`) + 62135596800000000)) div 1000 mod 1000) > 0)
 		}
 		[Fact]
 		public void Minutes() {
@@ -85,7 +85,7 @@ namespace FreeSql.Tests.MySqlExpression {
 			data.Add(select.Where(a => a.CreateTime.TimeOfDay.Minutes > 0).ToList());
 			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
 			//FROM `tb_topic` a 
-			//WHERE ((((time_to_sec(date_format(a.`CreateTime`, '1970-1-1 %H:%i:%s.%f')) * 1000000 + microsecond(a.`CreateTime`) + 6213559680000000)) div 60000000 mod 60) > 0)
+			//WHERE (((timestampdiff(microsecond, date_format(a.`CreateTime`, '1970-1-1 %H:%i:%s.%f'), a.`CreateTime`) + 62135596800000000)) div 60000000 mod 60) > 0)
 		}
 		[Fact]
 		public void Seconds() {
@@ -93,7 +93,7 @@ namespace FreeSql.Tests.MySqlExpression {
 			data.Add(select.Where(a => a.CreateTime.TimeOfDay.Seconds > 0).ToList());
 			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
 			//FROM `tb_topic` a 
-			//WHERE ((((time_to_sec(date_format(a.`CreateTime`, '1970-1-1 %H:%i:%s.%f')) * 1000000 + microsecond(a.`CreateTime`) + 6213559680000000)) div 1000000 mod 60) > 0)
+			//WHERE (((timestampdiff(microsecond, date_format(a.`CreateTime`, '1970-1-1 %H:%i:%s.%f'), a.`CreateTime`) + 62135596800000000)) div 1000000 mod 60) > 0)
 		}
 		[Fact]
 		public void Ticks() {
@@ -101,7 +101,7 @@ namespace FreeSql.Tests.MySqlExpression {
 			data.Add(select.Where(a => a.CreateTime.TimeOfDay.Ticks > 0).ToList());
 			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
 			//FROM `tb_topic` a 
-			//WHERE ((((time_to_sec(date_format(a.`CreateTime`, '1970-1-1 %H:%i:%s.%f')) * 1000000 + microsecond(a.`CreateTime`) + 6213559680000000)) * 10) > 0)
+			//WHERE (((timestampdiff(microsecond, date_format(a.`CreateTime`, '1970-1-1 %H:%i:%s.%f'), a.`CreateTime`) + 62135596800000000)) * 10) > 0)
 		}
 		[Fact]
 		public void TotalDays() {
@@ -109,7 +109,7 @@ namespace FreeSql.Tests.MySqlExpression {
 			data.Add(select.Where(a => a.CreateTime.TimeOfDay.TotalDays > 0).ToList());
 			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
 			//FROM `tb_topic` a 
-			//WHERE ((((time_to_sec(date_format(a.`CreateTime`, '1970-1-1 %H:%i:%s.%f')) * 1000000 + microsecond(a.`CreateTime`) + 6213559680000000)) / 86400000000) > 0)
+			//WHERE (((timestampdiff(microsecond, date_format(a.`CreateTime`, '1970-1-1 %H:%i:%s.%f'), a.`CreateTime`) + 62135596800000000)) / 86400000000) > 0)
 		}
 		[Fact]
 		public void TotalHours() {
@@ -117,7 +117,7 @@ namespace FreeSql.Tests.MySqlExpression {
 			data.Add(select.Where(a => a.CreateTime.TimeOfDay.TotalHours > 0).ToList());
 			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
 			//FROM `tb_topic` a 
-			//WHERE ((((time_to_sec(date_format(a.`CreateTime`, '1970-1-1 %H:%i:%s.%f')) * 1000000 + microsecond(a.`CreateTime`) + 6213559680000000)) / 3600000000) > 0)
+			//WHERE (((timestampdiff(microsecond, date_format(a.`CreateTime`, '1970-1-1 %H:%i:%s.%f'), a.`CreateTime`) + 62135596800000000)) / 3600000000) > 0)
 		}
 		[Fact]
 		public void TotalMilliseconds() {
@@ -125,7 +125,7 @@ namespace FreeSql.Tests.MySqlExpression {
 			data.Add(select.Where(a => a.CreateTime.TimeOfDay.TotalMilliseconds > 0).ToList());
 			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
 			//FROM `tb_topic` a 
-			//WHERE ((((time_to_sec(date_format(a.`CreateTime`, '1970-1-1 %H:%i:%s.%f')) * 1000000 + microsecond(a.`CreateTime`) + 6213559680000000)) / 1000) > 0)
+			//WHERE (((timestampdiff(microsecond, date_format(a.`CreateTime`, '1970-1-1 %H:%i:%s.%f'), a.`CreateTime`) + 62135596800000000)) / 1000) > 0)
 		}
 		[Fact]
 		public void TotalMinutes() {
@@ -133,7 +133,7 @@ namespace FreeSql.Tests.MySqlExpression {
 			data.Add(select.Where(a => a.CreateTime.TimeOfDay.TotalMinutes > 0).ToSql());
 			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
 			//FROM `tb_topic` a 
-			//WHERE ((((time_to_sec(date_format(a.`CreateTime`, '1970-1-1 %H:%i:%s.%f')) * 1000000 + microsecond(a.`CreateTime`) + 6213559680000000)) / 60000000) > 0)
+			//WHERE (((timestampdiff(microsecond, date_format(a.`CreateTime`, '1970-1-1 %H:%i:%s.%f'), a.`CreateTime`) + 62135596800000000)) / 60000000) > 0)
 		}
 		[Fact]
 		public void TotalSeconds() {
@@ -141,7 +141,7 @@ namespace FreeSql.Tests.MySqlExpression {
 			data.Add(select.Where(a => a.CreateTime.TimeOfDay.TotalSeconds > 0).ToList());
 			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
 			//FROM `tb_topic` a 
-			//WHERE ((((time_to_sec(date_format(a.`CreateTime`, '1970-1-1 %H:%i:%s.%f')) * 1000000 + microsecond(a.`CreateTime`) + 6213559680000000)) / 1000000) > 0)
+			//WHERE (((timestampdiff(microsecond, date_format(a.`CreateTime`, '1970-1-1 %H:%i:%s.%f'), a.`CreateTime`) + 62135596800000000)) / 1000000) > 0)
 		}
 		[Fact]
 		public void Add() {
@@ -149,7 +149,7 @@ namespace FreeSql.Tests.MySqlExpression {
 			data.Add(select.Where(a => a.CreateTime.TimeOfDay.Add(TimeSpan.FromDays(1)) > TimeSpan.Zero).ToList());
 			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
 			//FROM `tb_topic` a 
-			//WHERE (((time_to_sec(date_format(a.`CreateTime`, '1970-1-1 %H:%i:%s.%f')) * 1000000 + microsecond(a.`CreateTime`) + 6213559680000000) + (1 * 86400000000)) > 0)
+			//WHERE ((timestampdiff(microsecond, date_format(a.`CreateTime`, '1970-1-1 %H:%i:%s.%f'), a.`CreateTime`) + 62135596800000000) + (1 * 86400000000)) > 0)
 		}
 		[Fact]
 		public void Subtract() {
@@ -157,7 +157,7 @@ namespace FreeSql.Tests.MySqlExpression {
 			data.Add(select.Where(a => a.CreateTime.TimeOfDay.Subtract(TimeSpan.FromDays(1)) > TimeSpan.Zero).ToList());
 			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
 			//FROM `tb_topic` a 
-			//WHERE (((time_to_sec(date_format(a.`CreateTime`, '1970-1-1 %H:%i:%s.%f')) * 1000000 + microsecond(a.`CreateTime`) + 6213559680000000) - (1 * 86400000000)) > 0)
+			//WHERE ((timestampdiff(microsecond, date_format(a.`CreateTime`, '1970-1-1 %H:%i:%s.%f'), a.`CreateTime`) + 62135596800000000) - (1 * 86400000000)) > 0)
 		}
 		[Fact]
 		public void CompareTo() {
@@ -165,7 +165,7 @@ namespace FreeSql.Tests.MySqlExpression {
 			data.Add(select.Where(a => a.CreateTime.TimeOfDay.CompareTo(TimeSpan.FromDays(1)) > 0).ToList());
 			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
 			//FROM `tb_topic` a 
-			//WHERE ((((time_to_sec(date_format(a.`CreateTime`, '1970-1-1 %H:%i:%s.%f')) * 1000000 + microsecond(a.`CreateTime`) + 6213559680000000)) - ((1 * 86400000000))) > 0)
+			//WHERE (((timestampdiff(microsecond, date_format(a.`CreateTime`, '1970-1-1 %H:%i:%s.%f'), a.`CreateTime`) + 62135596800000000)) - ((1 * 86400000000))) > 0)
 		}
 		[Fact]
 		public void this_Equals() {
@@ -173,7 +173,7 @@ namespace FreeSql.Tests.MySqlExpression {
 			data.Add(select.Where(a => a.CreateTime.TimeOfDay.Equals(TimeSpan.FromDays(1))).ToList());
 			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
 			//FROM `tb_topic` a 
-			//WHERE (((time_to_sec(date_format(a.`CreateTime`, '1970-1-1 %H:%i:%s.%f')) * 1000000 + microsecond(a.`CreateTime`) + 6213559680000000) = (1 * 86400000000)))
+			//WHERE ((timestampdiff(microsecond, date_format(a.`CreateTime`, '1970-1-1 %H:%i:%s.%f'), a.`CreateTime`) + 62135596800000000) = (1 * 86400000000)))
 		}
 		[Fact]
 		public void this_ToString() {
@@ -181,7 +181,7 @@ namespace FreeSql.Tests.MySqlExpression {
 			data.Add(select.Where(a => a.CreateTime.TimeOfDay.ToString() == "ssss").ToList());
 			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
 			//FROM `tb_topic` a 
-			//WHERE (date_format(date_add(cast('0001/1/1 0:00:00' as datetime), interval ((time_to_sec(date_format(a.`CreateTime`, '1970-1-1 %H:%i:%s.%f')) * 1000000 + microsecond(a.`CreateTime`) + 6213559680000000)) microsecond), '%Y-%m-%d %H:%i:%s.%f') = 'ssss')
+			//WHERE (date_format(date_add(cast('0001/1/1 0:00:00' as datetime), interval (timestampdiff(microsecond, date_format(a.`CreateTime`, '1970-1-1 %H:%i:%s.%f'), a.`CreateTime`) + 62135596800000000)) microsecond), '%Y-%m-%d %H:%i:%s.%f') = 'ssss')
 		}
 
 		[Fact]
@@ -190,7 +190,7 @@ namespace FreeSql.Tests.MySqlExpression {
 			data.Add(select.Where(a => TimeSpan.Compare(a.CreateTime.TimeOfDay, TimeSpan.FromDays(1)) > 0).ToList());
 			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
 			//FROM `tb_topic` a 
-			//WHERE ((((time_to_sec(date_format(a.`CreateTime`, '1970-1-1 %H:%i:%s.%f')) * 1000000 + microsecond(a.`CreateTime`) + 6213559680000000)) - ((1 * 86400000000))) > 0)
+			//WHERE (((timestampdiff(microsecond, date_format(a.`CreateTime`, '1970-1-1 %H:%i:%s.%f'), a.`CreateTime`) + 62135596800000000)) - ((1 * 86400000000))) > 0)
 		}
 		[Fact]
 		public void TimeSpan_Equals() {
@@ -198,7 +198,7 @@ namespace FreeSql.Tests.MySqlExpression {
 			data.Add(select.Where(a => TimeSpan.Equals(a.CreateTime.TimeOfDay, TimeSpan.FromDays(1))).ToList());
 			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
 			//FROM `tb_topic` a 
-			//WHERE (((time_to_sec(date_format(a.`CreateTime`, '1970-1-1 %H:%i:%s.%f')) * 1000000 + microsecond(a.`CreateTime`) + 6213559680000000) = (1 * 86400000000)))
+			//WHERE ((timestampdiff(microsecond, date_format(a.`CreateTime`, '1970-1-1 %H:%i:%s.%f'), a.`CreateTime`) + 62135596800000000) = (1 * 86400000000)))
 		}
 		[Fact]
 		public void TimeSpan_FromDays() {
@@ -206,7 +206,7 @@ namespace FreeSql.Tests.MySqlExpression {
 			data.Add(select.Where(a => TimeSpan.Equals(a.CreateTime.TimeOfDay, TimeSpan.FromDays(1))).ToList());
 			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
 			//FROM `tb_topic` a 
-			//WHERE (((time_to_sec(date_format(a.`CreateTime`, '1970-1-1 %H:%i:%s.%f')) * 1000000 + microsecond(a.`CreateTime`) + 6213559680000000) = (1 * 86400000000)))
+			//WHERE ((timestampdiff(microsecond, date_format(a.`CreateTime`, '1970-1-1 %H:%i:%s.%f'), a.`CreateTime`) + 62135596800000000) = (1 * 86400000000)))
 		}
 		[Fact]
 		public void TimeSpan_FromHours() {
@@ -214,7 +214,7 @@ namespace FreeSql.Tests.MySqlExpression {
 			data.Add(select.Where(a => TimeSpan.Equals(a.CreateTime.TimeOfDay, TimeSpan.FromHours(1))).ToList());
 			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
 			//FROM `tb_topic` a 
-			//WHERE (((time_to_sec(date_format(a.`CreateTime`, '1970-1-1 %H:%i:%s.%f')) * 1000000 + microsecond(a.`CreateTime`) + 6213559680000000) = (1 * 3600000000)))
+			//WHERE ((timestampdiff(microsecond, date_format(a.`CreateTime`, '1970-1-1 %H:%i:%s.%f'), a.`CreateTime`) + 62135596800000000) = (1 * 3600000000)))
 		}
 		[Fact]
 		public void TimeSpan_FromMilliseconds() {
@@ -222,7 +222,7 @@ namespace FreeSql.Tests.MySqlExpression {
 			data.Add(select.Where(a => TimeSpan.Equals(a.CreateTime.TimeOfDay, TimeSpan.FromMilliseconds(1))).ToList());
 			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
 			//FROM `tb_topic` a 
-			//WHERE (((time_to_sec(date_format(a.`CreateTime`, '1970-1-1 %H:%i:%s.%f')) * 1000000 + microsecond(a.`CreateTime`) + 6213559680000000) = (1 * 1000)))
+			//WHERE ((timestampdiff(microsecond, date_format(a.`CreateTime`, '1970-1-1 %H:%i:%s.%f'), a.`CreateTime`) + 62135596800000000) = (1 * 1000)))
 		}
 		[Fact]
 		public void TimeSpan_FromMinutes() {
@@ -230,7 +230,7 @@ namespace FreeSql.Tests.MySqlExpression {
 			data.Add(select.Where(a => TimeSpan.Equals(a.CreateTime.TimeOfDay, TimeSpan.FromMinutes(1))).ToList());
 			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
 			//FROM `tb_topic` a 
-			//WHERE (((time_to_sec(date_format(a.`CreateTime`, '1970-1-1 %H:%i:%s.%f')) * 1000000 + microsecond(a.`CreateTime`) + 6213559680000000) = (1 * 60000000)))
+			//WHERE ((timestampdiff(microsecond, date_format(a.`CreateTime`, '1970-1-1 %H:%i:%s.%f'), a.`CreateTime`) + 62135596800000000) = (1 * 60000000)))
 		}
 		[Fact]
 		public void TimeSpan_FromSeconds() {
@@ -238,7 +238,7 @@ namespace FreeSql.Tests.MySqlExpression {
 			data.Add(select.Where(a => TimeSpan.Equals(a.CreateTime.TimeOfDay, TimeSpan.FromSeconds(1))).ToList());
 			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
 			//FROM `tb_topic` a 
-			//WHERE (((time_to_sec(date_format(a.`CreateTime`, '1970-1-1 %H:%i:%s.%f')) * 1000000 + microsecond(a.`CreateTime`) + 6213559680000000) = (1 * 1000000)))
+			//WHERE ((timestampdiff(microsecond, date_format(a.`CreateTime`, '1970-1-1 %H:%i:%s.%f'), a.`CreateTime`) + 62135596800000000) = (1 * 1000000)))
 		}
 		[Fact]
 		public void TimeSpan_FromTicks() {
@@ -246,7 +246,7 @@ namespace FreeSql.Tests.MySqlExpression {
 			data.Add(select.Where(a => TimeSpan.Equals(a.CreateTime.TimeOfDay, TimeSpan.FromTicks(1))).ToList());
 			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
 			//FROM `tb_topic` a 
-			//WHERE (((time_to_sec(date_format(a.`CreateTime`, '1970-1-1 %H:%i:%s.%f')) * 1000000 + microsecond(a.`CreateTime`) + 6213559680000000) = (1 / 10)))
+			//WHERE ((timestampdiff(microsecond, date_format(a.`CreateTime`, '1970-1-1 %H:%i:%s.%f'), a.`CreateTime`) + 62135596800000000) = (1 / 10)))
 		}
 		[Fact]
 		public void TimeSpan_Parse() {
@@ -254,7 +254,7 @@ namespace FreeSql.Tests.MySqlExpression {
 			data.Add(select.Where(a => TimeSpan.Parse(a.CreateTime.TimeOfDay.ToString()) > TimeSpan.Zero).ToList());
 			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
 			//FROM `tb_topic` a 
-			//WHERE (cast(date_format(date_add(cast('0001/1/1 0:00:00' as datetime), interval ((time_to_sec(date_format(a.`CreateTime`, '1970-1-1 %H:%i:%s.%f')) * 1000000 + microsecond(a.`CreateTime`) + 6213559680000000)) microsecond), '%Y-%m-%d %H:%i:%s.%f') as signed) > 0)
+			//WHERE (cast(date_format(date_add(cast('0001/1/1 0:00:00' as datetime), interval (timestampdiff(microsecond, date_format(a.`CreateTime`, '1970-1-1 %H:%i:%s.%f'), a.`CreateTime`) + 62135596800000000)) microsecond), '%Y-%m-%d %H:%i:%s.%f') as signed) > 0)
 		}
 	}
 }

FreeSql.Tests/SqlServer/SqlServerExpression/DateTimeTest.cs

@@ -0,0 +1,622 @@
+using FreeSql.DataAnnotations;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using Xunit;
+
+namespace FreeSql.Tests.SqlServerExpression {
+	public class DateTimeTest {
+
+		ISelect<Topic> select => g.sqlserver.Select<Topic>();
+
+		[Table(Name = "tb_topic111333")]
+		class Topic {
+			[Column(IsIdentity = true, IsPrimary = true)]
+			public int Id { get; set; }
+			public int Clicks { get; set; }
+			public int TestTypeInfoGuid { get; set; }
+			public TestTypeInfo Type { get; set; }
+			public string Title { get; set; }
+			public DateTime CreateTime { get; set; }
+		}
+		[Table(Name = "TestTypeInfo333")]
+		class TestTypeInfo {
+			public int Guid { get; set; }
+			public int ParentId { get; set; }
+			public TestTypeParentInfo Parent { get; set; }
+			public string Name { get; set; }
+			public DateTime Time { get; set; }
+		}
+		[Table(Name = "TestTypeParentInfo23123")]
+		class TestTypeParentInfo {
+			public int Id { get; set; }
+			public string Name { get; set; }
+
+			public List<TestTypeInfo> Types { get; set; }
+			public DateTime Time2 { get; set; }
+		}
+		[Fact]
+		public void Now() {
+			var data = new List<object>();
+			data.Add(select.Where(a => a.CreateTime.Date == DateTime.Now.Date).ToList());
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic111333` a 
+			//WHERE (cast(date_format(a.`CreateTime`, '%Y-%m-%d') as datetime) = cast(date_format(now(), '%Y-%m-%d') as datetime))
+		}
+		[Fact]
+		public void UtcNow() {
+			var data = new List<object>();
+			data.Add(select.Where(a => a.CreateTime.Date == DateTime.UtcNow.Date).ToList());
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic111333` a 
+			//WHERE (cast(date_format(a.`CreateTime`, '%Y-%m-%d') as datetime) = cast(date_format(utc_timestamp(), '%Y-%m-%d') as datetime))
+		}
+		[Fact]
+		public void MinValue() {
+			var data = new List<object>();
+			data.Add(select.Where(a => a.CreateTime.Date == DateTime.MinValue.Date).ToList());
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic111333` a 
+			//WHERE (cast(date_format(a.`CreateTime`, '%Y-%m-%d') as datetime) = cast(date_format(cast('0001/1/1 0:00:00' as datetime), '%Y-%m-%d') as datetime))
+		}
+		[Fact]
+		public void MaxValue() {
+			var data = new List<object>();
+			data.Add(select.Where(a => a.CreateTime.Date == DateTime.MaxValue.Date).ToList());
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic111333` a 
+			//WHERE (cast(date_format(a.`CreateTime`, '%Y-%m-%d') as datetime) = cast(date_format(cast('9999/12/31 23:59:59' as datetime), '%Y-%m-%d') as datetime))
+		}
+		[Fact]
+		public void Date() {
+			var data = new List<object>();
+			data.Add(select.Where(a => a.CreateTime.Date == DateTime.Now.Date).ToList());
+			data.Add(select.Where(a => a.Type.Time.Date > DateTime.Now.Date).ToList());
+			data.Add(select.Where(a => a.Type.Parent.Time2.Date > DateTime.Now.Date).ToList());
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic111333` a 
+			//WHERE (cast(date_format(a.`CreateTime`, '%Y-%m-%d') as datetime) = cast(date_format(now(), '%Y-%m-%d') as datetime));
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a__Type.`Time` as7, a.`Title` as8, a.`CreateTime` as9 
+			//FROM `tb_topic111333` a, `TestTypeInfo333` a__Type 
+			//WHERE (cast(date_format(a__Type.`Time`, '%Y-%m-%d') as datetime) > cast(date_format(now(), '%Y-%m-%d') as datetime));
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a__Type.`Time` as7, a.`Title` as8, a.`CreateTime` as9 
+			//FROM `tb_topic111333` a, `TestTypeInfo333` a__Type, `TestTypeParentInfo23123` a__Type__Parent 
+			//WHERE (cast(date_format(a__Type__Parent.`Time2`, '%Y-%m-%d') as datetime) > cast(date_format(now(), '%Y-%m-%d') as datetime));
+			data.Add(select.Where(a => DateTime.Now.Subtract(a.CreateTime.Date).TotalSeconds > 0).ToList());
+			data.Add(select.Where(a => DateTime.Now.Subtract(a.Type.Time.Date).TotalSeconds > 0).ToList());
+			data.Add(select.Where(a => DateTime.Now.Subtract(a.Type.Parent.Time2.Date).TotalSeconds > 0).ToList());
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic111333` a 
+			//WHERE (((timestampdiff(microsecond, cast(date_format(a.`CreateTime`, '%Y-%m-%d') as datetime), now())) / 1000000) > 0);
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a__Type.`Time` as7, a.`Title` as8, a.`CreateTime` as9 
+			//FROM `tb_topic111333` a, `TestTypeInfo333` a__Type 
+			//WHERE (((timestampdiff(microsecond, cast(date_format(a__Type.`Time`, '%Y-%m-%d') as datetime), now())) / 1000000) > 0);
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a__Type.`Time` as7, a.`Title` as8, a.`CreateTime` as9 
+			//FROM `tb_topic111333` a, `TestTypeInfo333` a__Type, `TestTypeParentInfo23123` a__Type__Parent 
+			//WHERE (((timestampdiff(microsecond, cast(date_format(a__Type__Parent.`Time2`, '%Y-%m-%d') as datetime), now())) / 1000000) > 0)
+		}
+		[Fact]
+		public void TimeOfDay() {
+			var data = new List<object>();
+			data.Add(select.Where(a => a.CreateTime.TimeOfDay == DateTime.Now.TimeOfDay).ToList());
+			data.Add(select.Where(a => a.Type.Time.TimeOfDay > DateTime.Now.TimeOfDay).ToList());
+			data.Add(select.Where(a => a.Type.Parent.Time2.TimeOfDay > DateTime.Now.TimeOfDay).ToList());
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic111333` a 
+			//WHERE ((timestampdiff(microsecond, date_format(a.`CreateTime`, '1970-1-1 %H:%i:%s.%f'), a.`CreateTime`) + 62135596800000000) = (timestampdiff(microsecond, date_format(now(), '1970-1-1 %H:%i:%s.%f'), now()) + 62135596800000000));
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a__Type.`Time` as7, a.`Title` as8, a.`CreateTime` as9 
+			//FROM `tb_topic111333` a, `TestTypeInfo333` a__Type 
+			//WHERE ((timestampdiff(microsecond, date_format(a__Type.`Time`, '1970-1-1 %H:%i:%s.%f'), a__Type.`Time`) + 62135596800000000) > (timestampdiff(microsecond, date_format(now(), '1970-1-1 %H:%i:%s.%f'), now()) + 62135596800000000));
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a__Type.`Time` as7, a.`Title` as8, a.`CreateTime` as9 
+			//FROM `tb_topic111333` a, `TestTypeInfo333` a__Type, `TestTypeParentInfo23123` a__Type__Parent 
+			//WHERE ((timestampdiff(microsecond, date_format(a__Type__Parent.`Time2`, '1970-1-1 %H:%i:%s.%f'), a__Type__Parent.`Time2`) + 62135596800000000) > (timestampdiff(microsecond, date_format(now(), '1970-1-1 %H:%i:%s.%f'), now()) + 62135596800000000))
+		}
+		[Fact]
+		public void DayOfWeek() {
+			var data = new List<object>();
+			data.Add(select.Where(a => a.CreateTime.DayOfWeek > DateTime.Now.DayOfWeek).ToList());
+			data.Add(select.Where(a => a.Type.Time.DayOfWeek > DateTime.Now.DayOfWeek).ToList());
+			data.Add(select.Where(a => a.Type.Parent.Time2.DayOfWeek > DateTime.Now.DayOfWeek).ToList());
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic111333` a 
+			//WHERE ((dayofweek(a.`CreateTime`) - 1) > (dayofweek(now()) - 1));
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a__Type.`Time` as7, a.`Title` as8, a.`CreateTime` as9 
+			//FROM `tb_topic111333` a, `TestTypeInfo333` a__Type 
+			//WHERE ((dayofweek(a__Type.`Time`) - 1) > (dayofweek(now()) - 1));
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a__Type.`Time` as7, a.`Title` as8, a.`CreateTime` as9 
+			//FROM `tb_topic111333` a, `TestTypeInfo333` a__Type, `TestTypeParentInfo23123` a__Type__Parent 
+			//WHERE ((dayofweek(a__Type__Parent.`Time2`) - 1) > (dayofweek(now()) - 1))
+		}
+		[Fact]
+		public void Day() {
+			var data = new List<object>();
+			data.Add(select.Where(a => a.CreateTime.Day > DateTime.Now.Day).ToList());
+			data.Add(select.Where(a => a.Type.Time.Day > DateTime.Now.Day).ToList());
+			data.Add(select.Where(a => a.Type.Parent.Time2.Day > DateTime.Now.Day).ToList());
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic111333` a 
+			//WHERE (dayofmonth(a.`CreateTime`) > dayofmonth(now()));
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a__Type.`Time` as7, a.`Title` as8, a.`CreateTime` as9 
+			//FROM `tb_topic111333` a, `TestTypeInfo333` a__Type 
+			//WHERE (dayofmonth(a__Type.`Time`) > dayofmonth(now()));
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a__Type.`Time` as7, a.`Title` as8, a.`CreateTime` as9 
+			//FROM `tb_topic111333` a, `TestTypeInfo333` a__Type, `TestTypeParentInfo23123` a__Type__Parent 
+			//WHERE (dayofmonth(a__Type__Parent.`Time2`) > dayofmonth(now()))
+		}
+		[Fact]
+		public void DayOfYear() {
+			var data = new List<object>();
+			data.Add(select.Where(a => a.CreateTime.DayOfYear > DateTime.Now.DayOfYear).ToList());
+			data.Add(select.Where(a => a.Type.Time.DayOfYear > DateTime.Now.DayOfYear).ToList());
+			data.Add(select.Where(a => a.Type.Parent.Time2.DayOfYear > DateTime.Now.DayOfYear).ToList());
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic111333` a 
+			//WHERE (dayofyear(a.`CreateTime`) > dayofyear(now()));
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a__Type.`Time` as7, a.`Title` as8, a.`CreateTime` as9 
+			//FROM `tb_topic111333` a, `TestTypeInfo333` a__Type 
+			//WHERE (dayofyear(a__Type.`Time`) > dayofyear(now()));
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a__Type.`Time` as7, a.`Title` as8, a.`CreateTime` as9 
+			//FROM `tb_topic111333` a, `TestTypeInfo333` a__Type, `TestTypeParentInfo23123` a__Type__Parent 
+			//WHERE (dayofyear(a__Type__Parent.`Time2`) > dayofyear(now()))
+		}
+		[Fact]
+		public void Month() {
+			var data = new List<object>();
+			data.Add(select.Where(a => a.CreateTime.Month > DateTime.Now.Month).ToList());
+			data.Add(select.Where(a => a.Type.Time.Month > DateTime.Now.Month).ToList());
+			data.Add(select.Where(a => a.Type.Parent.Time2.Month > DateTime.Now.Month).ToList());
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic111333` a 
+			//WHERE (month(a.`CreateTime`) > month(now()));
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a__Type.`Time` as7, a.`Title` as8, a.`CreateTime` as9 
+			//FROM `tb_topic111333` a, `TestTypeInfo333` a__Type 
+			//WHERE (month(a__Type.`Time`) > month(now()));
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a__Type.`Time` as7, a.`Title` as8, a.`CreateTime` as9 
+			//FROM `tb_topic111333` a, `TestTypeInfo333` a__Type, `TestTypeParentInfo23123` a__Type__Parent 
+			//WHERE (month(a__Type__Parent.`Time2`) > month(now()))
+		}
+		[Fact]
+		public void Year() {
+			var data = new List<object>();
+			data.Add(select.Where(a => a.CreateTime.Year > DateTime.Now.Year).ToList());
+			data.Add(select.Where(a => a.Type.Time.Year > DateTime.Now.Year).ToList());
+			data.Add(select.Where(a => a.Type.Parent.Time2.Year > DateTime.Now.Year).ToList());
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic111333` a 
+			//WHERE (year(a.`CreateTime`) > year(now()));
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a__Type.`Time` as7, a.`Title` as8, a.`CreateTime` as9 
+			//FROM `tb_topic111333` a, `TestTypeInfo333` a__Type 
+			//WHERE (year(a__Type.`Time`) > year(now()));
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a__Type.`Time` as7, a.`Title` as8, a.`CreateTime` as9 
+			//FROM `tb_topic111333` a, `TestTypeInfo333` a__Type, `TestTypeParentInfo23123` a__Type__Parent 
+			//WHERE (year(a__Type__Parent.`Time2`) > year(now()))
+		}
+		[Fact]
+		public void Hour() {
+			var data = new List<object>();
+			data.Add(select.Where(a => a.CreateTime.Hour > DateTime.Now.Hour).ToList());
+			data.Add(select.Where(a => a.Type.Time.Hour > DateTime.Now.Hour).ToList());
+			data.Add(select.Where(a => a.Type.Parent.Time2.Hour > DateTime.Now.Hour).ToList());
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic111333` a 
+			//WHERE (hour(a.`CreateTime`) > hour(now()));
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a__Type.`Time` as7, a.`Title` as8, a.`CreateTime` as9 
+			//FROM `tb_topic111333` a, `TestTypeInfo333` a__Type 
+			//WHERE (hour(a__Type.`Time`) > hour(now()));
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a__Type.`Time` as7, a.`Title` as8, a.`CreateTime` as9 
+			//FROM `tb_topic111333` a, `TestTypeInfo333` a__Type, `TestTypeParentInfo23123` a__Type__Parent 
+			//WHERE (hour(a__Type__Parent.`Time2`) > hour(now()))
+		}
+		[Fact]
+		public void Minute() {
+			var data = new List<object>();
+			data.Add(select.Where(a => a.CreateTime.Minute > DateTime.Now.Minute).ToList());
+			data.Add(select.Where(a => a.Type.Time.Minute > DateTime.Now.Minute).ToList());
+			data.Add(select.Where(a => a.Type.Parent.Time2.Minute > DateTime.Now.Minute).ToList());
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic111333` a 
+			//WHERE (minute(a.`CreateTime`) > minute(now()));
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a__Type.`Time` as7, a.`Title` as8, a.`CreateTime` as9 
+			//FROM `tb_topic111333` a, `TestTypeInfo333` a__Type 
+			//WHERE (minute(a__Type.`Time`) > minute(now()));
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a__Type.`Time` as7, a.`Title` as8, a.`CreateTime` as9 
+			//FROM `tb_topic111333` a, `TestTypeInfo333` a__Type, `TestTypeParentInfo23123` a__Type__Parent 
+			//WHERE (minute(a__Type__Parent.`Time2`) > minute(now()))
+		}
+		[Fact]
+		public void Second() {
+			var data = new List<object>();
+			data.Add(select.Where(a => a.CreateTime.Second > DateTime.Now.Second).ToList());
+			data.Add(select.Where(a => a.Type.Time.Second > DateTime.Now.Second).ToList());
+			data.Add(select.Where(a => a.Type.Parent.Time2.Second > DateTime.Now.Second).ToList());
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic111333` a 
+			//WHERE (second(a.`CreateTime`) > second(now()));
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a__Type.`Time` as7, a.`Title` as8, a.`CreateTime` as9 
+			//FROM `tb_topic111333` a, `TestTypeInfo333` a__Type 
+			//WHERE (second(a__Type.`Time`) > second(now()));
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a__Type.`Time` as7, a.`Title` as8, a.`CreateTime` as9 
+			//FROM `tb_topic111333` a, `TestTypeInfo333` a__Type, `TestTypeParentInfo23123` a__Type__Parent 
+			//WHERE (second(a__Type__Parent.`Time2`) > second(now()))
+		}
+		[Fact]
+		public void Millisecond() {
+			var data = new List<object>();
+			data.Add(select.Where(a => a.CreateTime.Millisecond > DateTime.Now.Millisecond).ToList());
+			data.Add(select.Where(a => a.Type.Time.Millisecond > DateTime.Now.Millisecond).ToList());
+			data.Add(select.Where(a => a.Type.Parent.Time2.Millisecond > DateTime.Now.Millisecond).ToList());
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic111333` a 
+			//WHERE (floor(microsecond(a.`CreateTime`) / 1000) > floor(microsecond(now()) / 1000));
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a__Type.`Time` as7, a.`Title` as8, a.`CreateTime` as9 
+			//FROM `tb_topic111333` a, `TestTypeInfo333` a__Type 
+			//WHERE (floor(microsecond(a__Type.`Time`) / 1000) > floor(microsecond(now()) / 1000));
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a__Type.`Time` as7, a.`Title` as8, a.`CreateTime` as9 
+			//FROM `tb_topic111333` a, `TestTypeInfo333` a__Type, `TestTypeParentInfo23123` a__Type__Parent 
+			//WHERE (floor(microsecond(a__Type__Parent.`Time2`) / 1000) > floor(microsecond(now()) / 1000))
+		}
+		[Fact]
+		public void Ticks() {
+			var data = new List<object>();
+			data.Add(select.Where(a => a.CreateTime.Ticks > DateTime.Now.Ticks).ToList());
+			data.Add(select.Where(a => a.Type.Time.Ticks > DateTime.Now.Ticks).ToList());
+			data.Add(select.Where(a => a.Type.Parent.Time2.Ticks > DateTime.Now.Ticks).ToList());
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic111333` a 
+			//WHERE ((timestampdiff(microsecond, '1970-1-1', a.`CreateTime`) * 10 + 621355968000000000) > (timestampdiff(microsecond, '1970-1-1', now()) * 10 + 621355968000000000));
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a__Type.`Time` as7, a.`Title` as8, a.`CreateTime` as9 
+			//FROM `tb_topic111333` a, `TestTypeInfo333` a__Type 
+			//WHERE ((timestampdiff(microsecond, '1970-1-1', a__Type.`Time`) * 10 + 621355968000000000) > (timestampdiff(microsecond, '1970-1-1', now()) * 10 + 621355968000000000));
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a__Type.`Time` as7, a.`Title` as8, a.`CreateTime` as9 
+			//FROM `tb_topic111333` a, `TestTypeInfo333` a__Type, `TestTypeParentInfo23123` a__Type__Parent 
+			//WHERE ((timestampdiff(microsecond, '1970-1-1', a__Type__Parent.`Time2`) * 10 + 621355968000000000) > (timestampdiff(microsecond, '1970-1-1', now()) * 10 + 621355968000000000))
+		}
+		[Fact]
+		public void Add() {
+			var data = new List<object>();
+			data.Add(select.Where(a => a.CreateTime.Add(TimeSpan.FromDays(1)) > DateTime.Now).ToList());
+			data.Add(select.Where(a => a.Type.Time.Add(TimeSpan.FromDays(1)) > DateTime.Now).ToList());
+			data.Add(select.Where(a => a.Type.Parent.Time2.Add(TimeSpan.FromDays(1)) > DateTime.Now).ToList());
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic111333` a 
+			//WHERE (date_add(a.`CreateTime`, interval ((1 * 86400000000)) microsecond) > now());
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a__Type.`Time` as7, a.`Title` as8, a.`CreateTime` as9 
+			//FROM `tb_topic111333` a, `TestTypeInfo333` a__Type 
+			//WHERE (date_add(a__Type.`Time`, interval ((1 * 86400000000)) microsecond) > now());
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a__Type.`Time` as7, a.`Title` as8, a.`CreateTime` as9 
+			//FROM `tb_topic111333` a, `TestTypeInfo333` a__Type, `TestTypeParentInfo23123` a__Type__Parent 
+			//WHERE (date_add(a__Type__Parent.`Time2`, interval ((1 * 86400000000)) microsecond) > now())
+		}
+		[Fact]
+		public void AddDays() {
+			var data = new List<object>();
+			data.Add(select.Where(a => a.CreateTime.AddDays(1) > DateTime.Now).ToList());
+			data.Add(select.Where(a => a.Type.Time.AddDays(1) > DateTime.Now).ToList());
+			data.Add(select.Where(a => a.Type.Parent.Time2.AddDays(1) > DateTime.Now).ToList());
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic111333` a 
+			//WHERE (date_add(a.`CreateTime`, interval (1) day) > now());
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a__Type.`Time` as7, a.`Title` as8, a.`CreateTime` as9 
+			//FROM `tb_topic111333` a, `TestTypeInfo333` a__Type 
+			//WHERE (date_add(a__Type.`Time`, interval (1) day) > now());
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a__Type.`Time` as7, a.`Title` as8, a.`CreateTime` as9 
+			//FROM `tb_topic111333` a, `TestTypeInfo333` a__Type, `TestTypeParentInfo23123` a__Type__Parent 
+			//WHERE (date_add(a__Type__Parent.`Time2`, interval (1) day) > now())
+		}
+		[Fact]
+		public void AddHours() {
+			var data = new List<object>();
+			data.Add(select.Where(a => a.CreateTime.AddHours(1) > DateTime.Now).ToList());
+			data.Add(select.Where(a => a.Type.Time.AddHours(1) > DateTime.Now).ToList());
+			data.Add(select.Where(a => a.Type.Parent.Time2.AddHours(1) > DateTime.Now).ToList());
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic111333` a 
+			//WHERE (date_add(a.`CreateTime`, interval (1) hour) > now());
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a__Type.`Time` as7, a.`Title` as8, a.`CreateTime` as9 
+			//FROM `tb_topic111333` a, `TestTypeInfo333` a__Type 
+			//WHERE (date_add(a__Type.`Time`, interval (1) hour) > now());
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a__Type.`Time` as7, a.`Title` as8, a.`CreateTime` as9 
+			//FROM `tb_topic111333` a, `TestTypeInfo333` a__Type, `TestTypeParentInfo23123` a__Type__Parent 
+			//WHERE (date_add(a__Type__Parent.`Time2`, interval (1) hour) > now())
+		}
+		[Fact]
+		public void AddMilliseconds() {
+			var data = new List<object>();
+			data.Add(select.Where(a => a.CreateTime.AddMilliseconds(1) > DateTime.Now).ToList());
+			data.Add(select.Where(a => a.Type.Time.AddMilliseconds(1) > DateTime.Now).ToList());
+			data.Add(select.Where(a => a.Type.Parent.Time2.AddMilliseconds(1) > DateTime.Now).ToList());
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic111333` a 
+			//WHERE (date_add(a.`CreateTime`, interval (1) * 1000 microsecond) > now());
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a__Type.`Time` as7, a.`Title` as8, a.`CreateTime` as9 
+			//FROM `tb_topic111333` a, `TestTypeInfo333` a__Type 
+			//WHERE (date_add(a__Type.`Time`, interval (1) * 1000 microsecond) > now());
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a__Type.`Time` as7, a.`Title` as8, a.`CreateTime` as9 
+			//FROM `tb_topic111333` a, `TestTypeInfo333` a__Type, `TestTypeParentInfo23123` a__Type__Parent 
+			//WHERE (date_add(a__Type__Parent.`Time2`, interval (1) * 1000 microsecond) > now())
+		}
+		[Fact]
+		public void AddMinutes() {
+			var data = new List<object>();
+			data.Add(select.Where(a => a.CreateTime.AddMinutes(1) > DateTime.Now).ToList());
+			data.Add(select.Where(a => a.Type.Time.AddMinutes(1) > DateTime.Now).ToList());
+			data.Add(select.Where(a => a.Type.Parent.Time2.AddMinutes(1) > DateTime.Now).ToList());
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic111333` a 
+			//WHERE (date_add(a.`CreateTime`, interval (1) minute) > now());
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a__Type.`Time` as7, a.`Title` as8, a.`CreateTime` as9 
+			//FROM `tb_topic111333` a, `TestTypeInfo333` a__Type 
+			//WHERE (date_add(a__Type.`Time`, interval (1) minute) > now());
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a__Type.`Time` as7, a.`Title` as8, a.`CreateTime` as9 
+			//FROM `tb_topic111333` a, `TestTypeInfo333` a__Type, `TestTypeParentInfo23123` a__Type__Parent 
+			//WHERE (date_add(a__Type__Parent.`Time2`, interval (1) minute) > now())
+		}
+		[Fact]
+		public void AddMonths() {
+			var data = new List<object>();
+			data.Add(select.Where(a => a.CreateTime.AddMonths(1) > DateTime.Now).ToList());
+			data.Add(select.Where(a => a.Type.Time.AddMonths(1) > DateTime.Now).ToList());
+			data.Add(select.Where(a => a.Type.Parent.Time2.AddMonths(1) > DateTime.Now).ToList());
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic111333` a 
+			//WHERE (date_add(a.`CreateTime`, interval (1) month) > now());
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a__Type.`Time` as7, a.`Title` as8, a.`CreateTime` as9 
+			//FROM `tb_topic111333` a, `TestTypeInfo333` a__Type 
+			//WHERE (date_add(a__Type.`Time`, interval (1) month) > now());
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a__Type.`Time` as7, a.`Title` as8, a.`CreateTime` as9 
+			//FROM `tb_topic111333` a, `TestTypeInfo333` a__Type, `TestTypeParentInfo23123` a__Type__Parent 
+			//WHERE (date_add(a__Type__Parent.`Time2`, interval (1) month) > now())
+		}
+		[Fact]
+		public void AddSeconds() {
+			var data = new List<object>();
+			data.Add(select.Where(a => a.CreateTime.AddSeconds(1) > DateTime.Now).ToList());
+			data.Add(select.Where(a => a.Type.Time.AddSeconds(1) > DateTime.Now).ToList());
+			data.Add(select.Where(a => a.Type.Parent.Time2.AddSeconds(1) > DateTime.Now).ToList());
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic111333` a 
+			//WHERE (date_add(a.`CreateTime`, interval (1) second) > now());
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a__Type.`Time` as7, a.`Title` as8, a.`CreateTime` as9 
+			//FROM `tb_topic111333` a, `TestTypeInfo333` a__Type 
+			//WHERE (date_add(a__Type.`Time`, interval (1) second) > now());
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a__Type.`Time` as7, a.`Title` as8, a.`CreateTime` as9 
+			//FROM `tb_topic111333` a, `TestTypeInfo333` a__Type, `TestTypeParentInfo23123` a__Type__Parent 
+			//WHERE (date_add(a__Type__Parent.`Time2`, interval (1) second) > now())
+		}
+		[Fact]
+		public void AddTicks() {
+			var data = new List<object>();
+			data.Add(select.Where(a => a.CreateTime.AddTicks(1) > DateTime.Now).ToList());
+			data.Add(select.Where(a => a.Type.Time.AddTicks(1) > DateTime.Now).ToList());
+			data.Add(select.Where(a => a.Type.Parent.Time2.AddTicks(1) > DateTime.Now).ToList());
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic111333` a 
+			//WHERE (date_add(a.`CreateTime`, interval (1) / 10 microsecond) > now());
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a__Type.`Time` as7, a.`Title` as8, a.`CreateTime` as9 
+			//FROM `tb_topic111333` a, `TestTypeInfo333` a__Type 
+			//WHERE (date_add(a__Type.`Time`, interval (1) / 10 microsecond) > now());
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a__Type.`Time` as7, a.`Title` as8, a.`CreateTime` as9 
+			//FROM `tb_topic111333` a, `TestTypeInfo333` a__Type, `TestTypeParentInfo23123` a__Type__Parent 
+			//WHERE (date_add(a__Type__Parent.`Time2`, interval (1) / 10 microsecond) > now())
+		}
+		[Fact]
+		public void AddYears() {
+			var data = new List<object>();
+			data.Add(select.Where(a => a.CreateTime.AddYears(1) > DateTime.Now).ToList());
+			data.Add(select.Where(a => a.Type.Time.AddYears(1) > DateTime.Now).ToList());
+			data.Add(select.Where(a => a.Type.Parent.Time2.AddYears(1) > DateTime.Now).ToList());
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic111333` a 
+			//WHERE (date_add(a.`CreateTime`, interval (1) year) > now());
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a__Type.`Time` as7, a.`Title` as8, a.`CreateTime` as9 
+			//FROM `tb_topic111333` a, `TestTypeInfo333` a__Type 
+			//WHERE (date_add(a__Type.`Time`, interval (1) year) > now());
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a__Type.`Time` as7, a.`Title` as8, a.`CreateTime` as9 
+			//FROM `tb_topic111333` a, `TestTypeInfo333` a__Type, `TestTypeParentInfo23123` a__Type__Parent 
+			//WHERE (date_add(a__Type__Parent.`Time2`, interval (1) year) > now())
+		}
+		[Fact]
+		public void Subtract() {
+			var data = new List<object>();
+			data.Add(select.Where(a => a.CreateTime.Subtract(DateTime.Now).TotalSeconds > 0).ToList());
+			data.Add(select.Where(a => a.Type.Time.Subtract(DateTime.Now).TotalSeconds > 0).ToList());
+			data.Add(select.Where(a => a.Type.Parent.Time2.Subtract(DateTime.Now).TotalSeconds > 0).ToList());
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic111333` a 
+			//WHERE (((timestampdiff(microsecond, now(), a.`CreateTime`)) / 1000000) > 0);
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a__Type.`Time` as7, a.`Title` as8, a.`CreateTime` as9 
+			//FROM `tb_topic111333` a, `TestTypeInfo333` a__Type 
+			//WHERE (((timestampdiff(microsecond, now(), a__Type.`Time`)) / 1000000) > 0);
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a__Type.`Time` as7, a.`Title` as8, a.`CreateTime` as9 
+			//FROM `tb_topic111333` a, `TestTypeInfo333` a__Type, `TestTypeParentInfo23123` a__Type__Parent 
+			//WHERE (((timestampdiff(microsecond, now(), a__Type__Parent.`Time2`)) / 1000000) > 0);
+			data.Add(select.Where(a => a.CreateTime.Subtract(TimeSpan.FromDays(1)) > a.CreateTime).ToList());
+			data.Add(select.Where(a => a.Type.Time.Subtract(TimeSpan.FromDays(1)) > a.CreateTime).ToList());
+			data.Add(select.Where(a => a.Type.Parent.Time2.Subtract(TimeSpan.FromDays(1)) > a.CreateTime).ToList());
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic111333` a 
+			//WHERE (date_sub(a.`CreateTime`, interval ((1 * 86400000000)) microsecond) > a.`CreateTime`);
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a__Type.`Time` as7, a.`Title` as8, a.`CreateTime` as9 
+			//FROM `tb_topic111333` a, `TestTypeInfo333` a__Type 
+			//WHERE (date_sub(a__Type.`Time`, interval ((1 * 86400000000)) microsecond) > a.`CreateTime`);
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a__Type.`Time` as7, a.`Title` as8, a.`CreateTime` as9 
+			//FROM `tb_topic111333` a, `TestTypeInfo333` a__Type, `TestTypeParentInfo23123` a__Type__Parent 
+			//WHERE (date_sub(a__Type__Parent.`Time2`, interval ((1 * 86400000000)) microsecond) > a.`CreateTime`)
+		}
+		[Fact]
+		public void this_Equals() {
+			var data = new List<object>();
+			data.Add(select.Where(a => a.CreateTime.AddYears(1).Equals(DateTime.Now)).ToList());
+			data.Add(select.Where(a => a.Type.Time.AddYears(1).Equals(DateTime.Now)).ToList());
+			data.Add(select.Where(a => a.Type.Parent.Time2.AddYears(1).Equals(DateTime.Now)).ToList());
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic111333` a 
+			//WHERE ((date_add(a.`CreateTime`, interval (1) year) = now()));
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a__Type.`Time` as7, a.`Title` as8, a.`CreateTime` as9 
+			//FROM `tb_topic111333` a, `TestTypeInfo333` a__Type 
+			//WHERE ((date_add(a__Type.`Time`, interval (1) year) = now()));
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a__Type.`Time` as7, a.`Title` as8, a.`CreateTime` as9 
+			//FROM `tb_topic111333` a, `TestTypeInfo333` a__Type, `TestTypeParentInfo23123` a__Type__Parent 
+			//WHERE ((date_add(a__Type__Parent.`Time2`, interval (1) year) = now()))
+		}
+		[Fact]
+		public void this_ToString() {
+			var data = new List<object>();
+			data.Add(select.Where(a => a.CreateTime.ToString().Equals(DateTime.Now)).ToList());
+			data.Add(select.Where(a => a.Type.Time.AddYears(1).ToString().Equals(DateTime.Now)).ToList());
+			data.Add(select.Where(a => a.Type.Parent.Time2.AddYears(1).ToString().Equals(DateTime.Now)).ToList());
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic111333` a 
+			//WHERE ((date_format(a.`CreateTime`, '%Y-%m-%d %H:%i:%s.%f') = now()));
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a__Type.`Time` as7, a.`Title` as8, a.`CreateTime` as9 
+			//FROM `tb_topic111333` a, `TestTypeInfo333` a__Type 
+			//WHERE ((date_format(date_add(a__Type.`Time`, interval (1) year), '%Y-%m-%d %H:%i:%s.%f') = now()));
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a__Type.`Time` as7, a.`Title` as8, a.`CreateTime` as9 
+			//FROM `tb_topic111333` a, `TestTypeInfo333` a__Type, `TestTypeParentInfo23123` a__Type__Parent 
+			//WHERE ((date_format(date_add(a__Type__Parent.`Time2`, interval (1) year), '%Y-%m-%d %H:%i:%s.%f') = now()))
+		}
+
+		[Fact]
+		public void DateTime_Compare() {
+			var data = new List<object>();
+			data.Add(select.Where(a => a.CreateTime.CompareTo(DateTime.Now) == 0).ToList());
+			data.Add(select.Where(a => a.Type.Time.AddYears(1).CompareTo(DateTime.Now) == 0).ToList());
+			data.Add(select.Where(a => a.Type.Parent.Time2.AddYears(1).CompareTo(DateTime.Now) == 0).ToList());
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic111333` a 
+			//WHERE (((a.`CreateTime`) - (now())) = 0);
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a__Type.`Time` as7, a.`Title` as8, a.`CreateTime` as9 
+			//FROM `tb_topic111333` a, `TestTypeInfo333` a__Type 
+			//WHERE (((date_add(a__Type.`Time`, interval (1) year)) - (now())) = 0);
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a__Type.`Time` as7, a.`Title` as8, a.`CreateTime` as9 
+			//FROM `tb_topic111333` a, `TestTypeInfo333` a__Type, `TestTypeParentInfo23123` a__Type__Parent 
+			//WHERE (((date_add(a__Type__Parent.`Time2`, interval (1) year)) - (now())) = 0)
+		}
+		[Fact]
+		public void DateTime_DaysInMonth() {
+			var data = new List<object>();
+			data.Add(select.Where(a => DateTime.DaysInMonth(a.CreateTime.Year, a.CreateTime.Month) > 30).ToList());
+			data.Add(select.Where(a => DateTime.DaysInMonth(a.Type.Time.Year, a.Type.Time.Month) > 30).ToList());
+			data.Add(select.Where(a => DateTime.DaysInMonth(a.Type.Parent.Time2.Year, a.Type.Parent.Time2.Month) > 30).ToList());
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic111333` a 
+			//WHERE (dayofmonth(last_day(concat(year(a.`CreateTime`), month(a.`CreateTime`), '-01'))) > 30);
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a__Type.`Time` as7, a.`Title` as8, a.`CreateTime` as9 
+			//FROM `tb_topic111333` a, `TestTypeInfo333` a__Type 
+			//WHERE (dayofmonth(last_day(concat(year(a__Type.`Time`), month(a__Type.`Time`), '-01'))) > 30);
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a__Type.`Time` as7, a.`Title` as8, a.`CreateTime` as9 
+			//FROM `tb_topic111333` a, `TestTypeInfo333` a__Type, `TestTypeParentInfo23123` a__Type__Parent 
+			//WHERE (dayofmonth(last_day(concat(year(a__Type__Parent.`Time2`), month(a__Type__Parent.`Time2`), '-01'))) > 30)
+		}
+		[Fact]
+		public void DateTime_Equals() {
+			var data = new List<object>();
+			data.Add(select.Where(a => DateTime.Equals(a.CreateTime.AddYears(1), DateTime.Now)).ToList());
+			data.Add(select.Where(a => DateTime.Equals(a.Type.Time.AddYears(1), DateTime.Now)).ToList());
+			data.Add(select.Where(a => DateTime.Equals(a.Type.Parent.Time2.AddYears(1), DateTime.Now)).ToList());
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic111333` a 
+			//WHERE ((date_add(a.`CreateTime`, interval (1) year) = now()));
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a__Type.`Time` as7, a.`Title` as8, a.`CreateTime` as9 
+			//FROM `tb_topic111333` a, `TestTypeInfo333` a__Type 
+			//WHERE ((date_add(a__Type.`Time`, interval (1) year) = now()));
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a__Type.`Time` as7, a.`Title` as8, a.`CreateTime` as9 
+			//FROM `tb_topic111333` a, `TestTypeInfo333` a__Type, `TestTypeParentInfo23123` a__Type__Parent 
+			//WHERE ((date_add(a__Type__Parent.`Time2`, interval (1) year) = now()))
+		}
+		[Fact]
+		public void DateTime_IsLeapYear() {
+			var data = new List<object>();
+			data.Add(select.Where(a => DateTime.IsLeapYear(a.CreateTime.Year)).ToList());
+			data.Add(select.Where(a => DateTime.IsLeapYear(a.Type.Time.AddYears(1).Year)).ToList());
+			data.Add(select.Where(a => DateTime.IsLeapYear(a.Type.Parent.Time2.AddYears(1).Year)).ToList());
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic111333` a 
+			//WHERE (((year(a.`CreateTime`)) % 4 = 0 AND (year(a.`CreateTime`)) % 100 <> 0 OR (year(a.`CreateTime`)) % 400 = 0));
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a__Type.`Time` as7, a.`Title` as8, a.`CreateTime` as9 
+			//FROM `tb_topic111333` a, `TestTypeInfo333` a__Type 
+			//WHERE (((year(date_add(a__Type.`Time`, interval (1) year))) % 4 = 0 AND (year(date_add(a__Type.`Time`, interval (1) year))) % 100 <> 0 OR (year(date_add(a__Type.`Time`, interval (1) year))) % 400 = 0));
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a__Type.`Time` as7, a.`Title` as8, a.`CreateTime` as9 
+			//FROM `tb_topic111333` a, `TestTypeInfo333` a__Type, `TestTypeParentInfo23123` a__Type__Parent 
+			//WHERE (((year(date_add(a__Type__Parent.`Time2`, interval (1) year))) % 4 = 0 AND (year(date_add(a__Type__Parent.`Time2`, interval (1) year))) % 100 <> 0 OR (year(date_add(a__Type__Parent.`Time2`, interval (1) year))) % 400 = 0))
+		}
+		[Fact]
+		public void DateTime_Parse() {
+			var data = new List<object>();
+			data.Add(select.Where(a => DateTime.Parse(a.CreateTime.ToString()) > DateTime.Now).ToList());
+			data.Add(select.Where(a => DateTime.Parse(a.Type.Time.AddYears(1).ToString()) > DateTime.Now).ToList());
+			data.Add(select.Where(a => DateTime.Parse(a.Type.Parent.Time2.AddYears(1).ToString()) > DateTime.Now).ToList());
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic111333` a 
+			//WHERE (cast(date_format(a.`CreateTime`, '%Y-%m-%d %H:%i:%s.%f') as datetime) > now());
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a__Type.`Time` as7, a.`Title` as8, a.`CreateTime` as9 
+			//FROM `tb_topic111333` a, `TestTypeInfo333` a__Type 
+			//WHERE (cast(date_format(date_add(a__Type.`Time`, interval (1) year), '%Y-%m-%d %H:%i:%s.%f') as datetime) > now());
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a__Type.`Time` as7, a.`Title` as8, a.`CreateTime` as9 
+			//FROM `tb_topic111333` a, `TestTypeInfo333` a__Type, `TestTypeParentInfo23123` a__Type__Parent 
+			//WHERE (cast(date_format(date_add(a__Type__Parent.`Time2`, interval (1) year), '%Y-%m-%d %H:%i:%s.%f') as datetime) > now())
+		}
+	}
+}

FreeSql.Tests/SqlServer/SqlServerExpression/MathTest.cs

@@ -0,0 +1,132 @@
+using FreeSql.DataAnnotations;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using Xunit;
+
+namespace FreeSql.Tests.SqlServerExpression {
+	public class MathTest {
+
+		ISelect<Topic> select => g.sqlserver.Select<Topic>();
+
+		[Table(Name = "tb_topic")]
+		class Topic {
+			[Column(IsIdentity = true, IsPrimary = true)]
+			public int Id { get; set; }
+			public int Clicks { get; set; }
+			public int TestTypeInfoGuid { get; set; }
+			public TestTypeInfo Type { get; set; }
+			public string Title { get; set; }
+			public DateTime CreateTime { get; set; }
+		}
+		class TestTypeInfo {
+			public int Guid { get; set; }
+			public int ParentId { get; set; }
+			public TestTypeParentInfo Parent { get; set; }
+			public string Name { get; set; }
+		}
+		class TestTypeParentInfo {
+			public int Id { get; set; }
+			public string Name { get; set; }
+
+			public List<TestTypeInfo> Types { get; set; }
+		}
+
+		[Fact]
+		public void PI() {
+			var data = new List<object>();
+			data.Add(select.Where(a => Math.PI + a.Clicks > 0).ToList());
+		}
+		[Fact]
+		public void Abs() {
+			var data = new List<object>();
+			data.Add(select.Where(a => Math.Abs(-a.Clicks) > 0).ToList());
+		}
+		[Fact]
+		public void Sign() {
+			var data = new List<object>();
+			data.Add(select.Where(a => Math.Sign(-a.Clicks) > 0).ToList());
+		}
+		[Fact]
+		public void Floor() {
+			var data = new List<object>();
+			data.Add(select.Where(a => Math.Floor(a.Clicks + 0.5) == a.Clicks).ToList());
+		}
+		[Fact]
+		public void Ceiling() {
+			var data = new List<object>();
+			data.Add(select.Where(a => Math.Ceiling(a.Clicks + 0.5) == a.Clicks + 1).ToList());
+		}
+		[Fact]
+		public void Round() {
+			var data = new List<object>();
+			data.Add(select.Where(a => Math.Round(a.Clicks + 0.5) == a.Clicks).ToList());
+			data.Add(select.Where(a => Math.Round(a.Clicks + 0.5, 1) > a.Clicks).ToList());
+		}
+		[Fact]
+		public void Exp() {
+			var data = new List<object>();
+			data.Add(select.Where(a => Math.Exp(1) == a.Clicks + 1).ToList());
+		}
+		[Fact]
+		public void Log() {
+			var data = new List<object>();
+			data.Add(select.Where(a => Math.Log(a.Clicks + 0.5) == a.Clicks + 1).ToList());
+		}
+		[Fact]
+		public void Log10() {
+			var data = new List<object>();
+			data.Add(select.Where(a => Math.Log10(a.Clicks + 0.5) == a.Clicks + 1).ToList());
+		}
+		[Fact]
+		public void Pow() {
+			var data = new List<object>();
+			//data.Add(select.Where(a => Math.Pow(2, a.Clicks) == a.Clicks + 1).ToList());
+		}
+		[Fact]
+		public void Sqrt() {
+			var data = new List<object>();
+			//data.Add(select.Where(a => Math.Sqrt(Math.Pow(2, a.Clicks)) == a.Clicks + 1).ToList());
+		}
+		[Fact]
+		public void Cos() {
+			var data = new List<object>();
+			//data.Add(select.Where(a => Math.Cos(Math.Pow(2, a.Clicks)) == a.Clicks + 1).ToList());
+		}
+		[Fact]
+		public void Sin() {
+			var data = new List<object>();
+			//data.Add(select.Where(a => Math.Sin(Math.Pow(2, a.Clicks)) == a.Clicks + 1).ToList());
+		}
+		[Fact]
+		public void Tan() {
+			var data = new List<object>();
+			//data.Add(select.Where(a => Math.Tan(Math.Pow(2, a.Clicks)) == a.Clicks + 1).ToList());
+		}
+		[Fact]
+		public void Acos() {
+			var data = new List<object>();
+			//data.Add(select.Where(a => Math.Acos(Math.Pow(2, a.Clicks)) == a.Clicks + 1).ToList());
+		}
+		[Fact]
+		public void Asin() {
+			var data = new List<object>();
+			//data.Add(select.Where(a => Math.Asin(Math.Pow(2, a.Clicks)) == a.Clicks + 1).ToList());
+		}
+		[Fact]
+		public void Atan() {
+			var data = new List<object>();
+			//data.Add(select.Where(a => Math.Atan(Math.Pow(2, a.Clicks)) == a.Clicks + 1).ToList());
+		}
+		[Fact]
+		public void Atan2() {
+			var data = new List<object>();
+			//data.Add(select.Where(a => Math.Atan2(2, a.Clicks) == a.Clicks + 1).ToList());
+		}
+		[Fact]
+		public void Truncate() {
+			var data = new List<object>();
+			data.Add(select.Where(a => Math.Truncate(a.Clicks * 1.0 / 3) == a.Clicks + 1).ToList());
+		}
+	}
+}

FreeSql.Tests/SqlServer/SqlServerExpression/StringTest.cs

@@ -0,0 +1,675 @@
+using FreeSql.DataAnnotations;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using Xunit;
+
+namespace FreeSql.Tests.SqlServerExpression {
+	public class StringTest {
+
+		ISelect<Topic> select => g.sqlserver.Select<Topic>();
+
+		[Table(Name = "tb_topic")]
+		class Topic {
+			[Column(IsIdentity = true, IsPrimary = true)]
+			public int Id { get; set; }
+			public int Clicks { get; set; }
+			public int TestTypeInfoGuid { get; set; }
+			public TestTypeInfo Type { get; set; }
+			public string Title { get; set; }
+			public DateTime CreateTime { get; set; }
+		}
+		class TestTypeInfo {
+			public int Guid { get; set; }
+			public int ParentId { get; set; }
+			public TestTypeParentInfo Parent { get; set; }
+			public string Name { get; set; }
+		}
+		class TestTypeParentInfo {
+			public int Id { get; set; }
+			public string Name { get; set; }
+
+			public List<TestTypeInfo> Types { get; set; }
+		}
+
+		[Fact]
+		public void Empty() {
+			var data = new List<object>();
+			data.Add(select.Where(a => (a.Title ?? "") == string.Empty).ToSql());
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic` a 
+			//WHERE (ifnull(a.`Title`, '') = '')
+		}
+
+		[Fact]
+		public void StartsWith() {
+			var list = new List<object>();
+			list.Add(select.Where(a => a.Title.StartsWith("aaa")).ToList());
+			list.Add(select.Where(a => a.Title.StartsWith(a.Title)).ToList());
+			list.Add(select.Where(a => a.Title.StartsWith(a.Title + 1)).ToList());
+			list.Add(select.Where(a => a.Title.StartsWith(a.Type.Name)).ToList());
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5
+			//FROM `tb_topic` a
+			//WHERE((a.`Title`) LIKE '%aaa')
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5
+			//FROM `tb_topic` a
+			//WHERE((a.`Title`) LIKE concat('%', a.`Title`))
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5
+			//FROM `tb_topic` a
+			//WHERE((a.`Title`) LIKE concat('%', concat(a.`Title`, 1)))
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a.`Title` as7, a.`CreateTime` as8
+			//FROM `tb_topic` a, `TestTypeInfo` a__Type
+			//WHERE((a.`Title`) LIKE concat('%', a__Type.`Name`))
+			list.Add(select.Where(a => (a.Title + "aaa").StartsWith("aaa")).ToList());
+			list.Add(select.Where(a => (a.Title + "aaa").StartsWith(a.Title)).ToList());
+			list.Add(select.Where(a => (a.Title + "aaa").StartsWith(a.Title + 1)).ToList());
+			list.Add(select.Where(a => (a.Title + "aaa").StartsWith(a.Type.Name)).ToList());
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5
+			//FROM `tb_topic` a
+			//WHERE((concat(a.`Title`, 'aaa')) LIKE '%aaa')
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5
+			//FROM `tb_topic` a
+			//WHERE((concat(a.`Title`, 'aaa')) LIKE concat('%', a.`Title`))
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5
+			//FROM `tb_topic` a
+			//WHERE((concat(a.`Title`, 'aaa')) LIKE concat('%', concat(a.`Title`, 1)))
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a.`Title` as7, a.`CreateTime` as8
+			//FROM `tb_topic` a, `TestTypeInfo` a__Type
+			//WHERE((concat(a.`Title`, 'aaa')) LIKE concat('%', a__Type.`Name`))
+		}
+		[Fact]
+		public void EndsWith() {
+			var list = new List<object>();
+			list.Add(select.Where(a => a.Title.EndsWith("aaa")).ToList());
+			list.Add(select.Where(a => a.Title.EndsWith(a.Title)).ToList());
+			list.Add(select.Where(a => a.Title.EndsWith(a.Title + 1)).ToList());
+			list.Add(select.Where(a => a.Title.EndsWith(a.Type.Name)).ToList());
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5
+			//FROM `tb_topic` a
+			//WHERE((a.`Title`) LIKE 'aaa%')
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5
+			//FROM `tb_topic` a
+			//WHERE((a.`Title`) LIKE concat(a.`Title`, '%'))
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5
+			//FROM `tb_topic` a
+			//WHERE((a.`Title`) LIKE concat(concat(a.`Title`, 1), '%'))
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a.`Title` as7, a.`CreateTime` as8
+			//FROM `tb_topic` a, `TestTypeInfo` a__Type
+			//WHERE((a.`Title`) LIKE concat(a__Type.`Name`, '%'))
+			list.Add(select.Where(a => (a.Title + "aaa").EndsWith("aaa")).ToList());
+			list.Add(select.Where(a => (a.Title + "aaa").EndsWith(a.Title)).ToList());
+			list.Add(select.Where(a => (a.Title + "aaa").EndsWith(a.Title + 1)).ToList());
+			list.Add(select.Where(a => (a.Title + "aaa").EndsWith(a.Type.Name)).ToList());
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5
+			//FROM `tb_topic` a
+			//WHERE((concat(a.`Title`, 'aaa')) LIKE 'aaa%')
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5
+			//FROM `tb_topic` a
+			//WHERE((concat(a.`Title`, 'aaa')) LIKE concat(a.`Title`, '%'))
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5
+			//FROM `tb_topic` a
+			//WHERE((concat(a.`Title`, 'aaa')) LIKE concat(concat(a.`Title`, 1), '%'))
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a.`Title` as7, a.`CreateTime` as8
+			//FROM `tb_topic` a, `TestTypeInfo` a__Type
+			//WHERE((concat(a.`Title`, 'aaa')) LIKE concat(a__Type.`Name`, '%'))
+		}
+		[Fact]
+		public void Contains() {
+			var list = new List<object>();
+			list.Add(select.Where(a => a.Title.Contains("aaa")).ToList());
+			list.Add(select.Where(a => a.Title.Contains(a.Title)).ToList());
+			list.Add(select.Where(a => a.Title.Contains(a.Title + 1)).ToList());
+			list.Add(select.Where(a => a.Title.Contains(a.Type.Name)).ToList());
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5
+			//FROM `tb_topic` a
+			//WHERE((a.`Title`) LIKE '%aaa%')
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5
+			//FROM `tb_topic` a
+			//WHERE((a.`Title`) LIKE concat('%', a.`Title`, '%'))
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5
+			//FROM `tb_topic` a
+			//WHERE((a.`Title`) LIKE concat('%', a.`Title` +1, '%'))
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a.`Title` as7, a.`CreateTime` as8
+			//FROM `tb_topic` a, `TestTypeInfo` a__Type
+			//WHERE((a.`Title`) LIKE concat('%', a__Type.`Name`, '%'))
+			list.Add(select.Where(a => (a.Title + "aaa").Contains("aaa")).ToList());
+			list.Add(select.Where(a => (a.Title + "aaa").Contains(a.Title)).ToList());
+			list.Add(select.Where(a => (a.Title + "aaa").Contains(a.Title + 1)).ToList());
+			list.Add(select.Where(a => (a.Title + "aaa").Contains(a.Type.Name)).ToList());
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5
+			//FROM `tb_topic` a
+			//WHERE((concat(a.`Title`, 'aaa')) LIKE '%aaa%')
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5
+			//FROM `tb_topic` a
+			//WHERE((concat(a.`Title`, 'aaa')) LIKE concat('%', a.`Title`, '%'))
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5
+			//FROM `tb_topic` a
+			//WHERE((concat(a.`Title`, 'aaa')) LIKE concat('%', concat(a.`Title`, 1), '%'))
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a.`Title` as7, a.`CreateTime` as8
+			//FROM `tb_topic` a, `TestTypeInfo` a__Type
+			//WHERE((concat(a.`Title`, 'aaa')) LIKE concat('%', a__Type.`Name`, '%'))
+		}
+		[Fact]
+		public void ToLower() {
+			var data = new List<object>();
+			data.Add(select.Where(a => a.Title.ToLower() == "aaa").ToList());
+			data.Add(select.Where(a => a.Title.ToLower() == a.Title).ToList());
+			data.Add(select.Where(a => a.Title.ToLower() == (a.Title + 1)).ToList());
+			data.Add(select.Where(a => a.Title.ToLower() == a.Type.Name).ToList());
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5
+			//FROM `tb_topic` a
+			//WHERE(lower(a.`Title`) = 'aaa');
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5
+			//FROM `tb_topic` a
+			//WHERE(lower(a.`Title`) = a.`Title`);
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5
+			//FROM `tb_topic` a
+			//WHERE(lower(a.`Title`) = concat(a.`Title`, 1));
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a.`Title` as7, a.`CreateTime` as8
+			//FROM `tb_topic` a, `TestTypeInfo` a__Type
+			//WHERE(lower(a.`Title`) = a__Type.`Name`);
+			data.Add(select.Where(a => (a.Title.ToLower() + "aaa").ToLower() == "aaa").ToList());
+			data.Add(select.Where(a => (a.Title.ToLower() + "aaa").ToLower() == a.Title).ToList());
+			data.Add(select.Where(a => (a.Title.ToLower() + "aaa").ToLower() == (a.Title + 1)).ToList());
+			data.Add(select.Where(a => (a.Title.ToLower() + "aaa").ToLower() == a.Type.Name).ToList());
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5
+			//FROM `tb_topic` a
+			//WHERE(lower(concat(lower(a.`Title`), 'aaa')) = 'aaa');
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5
+			//FROM `tb_topic` a
+			//WHERE(lower(concat(lower(a.`Title`), 'aaa')) = a.`Title`);
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5
+			//FROM `tb_topic` a
+			//WHERE(lower(concat(lower(a.`Title`), 'aaa')) = concat(a.`Title`, 1));
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a.`Title` as7, a.`CreateTime` as8
+			//FROM `tb_topic` a, `TestTypeInfo` a__Type
+			//WHERE(lower(concat(lower(a.`Title`), 'aaa')) = a__Type.`Name`)
+		}
+		[Fact]
+		public void ToUpper() {
+			var data = new List<object>();
+			data.Add(select.Where(a => a.Title.ToUpper() == "aaa").ToList());
+			data.Add(select.Where(a => a.Title.ToUpper() == a.Title).ToList());
+			data.Add(select.Where(a => a.Title.ToUpper() == (a.Title + 1)).ToList());
+			data.Add(select.Where(a => a.Title.ToUpper() == a.Type.Name).ToList());
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic` a 
+			//WHERE (upper(a.`Title`) = 'aaa');
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic` a 
+			//WHERE (upper(a.`Title`) = a.`Title`);
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic` a 
+			//WHERE (upper(a.`Title`) = concat(a.`Title`, 1));
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a.`Title` as7, a.`CreateTime` as8 
+			//FROM `tb_topic` a, `TestTypeInfo` a__Type 
+			//WHERE (upper(a.`Title`) = a__Type.`Name`);
+			data.Add(select.Where(a => (a.Title.ToUpper() + "aaa").ToUpper() == "aaa").ToList());
+			data.Add(select.Where(a => (a.Title.ToUpper() + "aaa").ToUpper() == a.Title).ToList());
+			data.Add(select.Where(a => (a.Title.ToUpper() + "aaa").ToUpper() == (a.Title + 1)).ToList());
+			data.Add(select.Where(a => (a.Title.ToUpper() + "aaa").ToUpper() == a.Type.Name).ToList());
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic` a 
+			//WHERE (upper(concat(upper(a.`Title`), 'aaa')) = 'aaa');
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic` a 
+			//WHERE (upper(concat(upper(a.`Title`), 'aaa')) = a.`Title`);
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic` a 
+			//WHERE (upper(concat(upper(a.`Title`), 'aaa')) = concat(a.`Title`, 1));
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a.`Title` as7, a.`CreateTime` as8 
+			//FROM `tb_topic` a, `TestTypeInfo` a__Type 
+			//WHERE (upper(concat(upper(a.`Title`), 'aaa')) = a__Type.`Name`)
+		}
+		[Fact]
+		public void Substring() {
+			var data = new List<object>();
+			data.Add(select.Where(a => a.Title.Substring(0) == "aaa").ToList());
+			data.Add(select.Where(a => a.Title.Substring(0) == a.Title).ToList());
+			data.Add(select.Where(a => a.Title.Substring(0) == (a.Title + 1)).ToList());
+			data.Add(select.Where(a => a.Title.Substring(0) == a.Type.Name).ToList());
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic` a 
+			//WHERE (substr(a.`Title`, 1) = 'aaa');
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic` a 
+			//WHERE (substr(a.`Title`, 1) = a.`Title`);
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic` a 
+			//WHERE (substr(a.`Title`, 1) = concat(a.`Title`, 1));
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a.`Title` as7, a.`CreateTime` as8 
+			//FROM `tb_topic` a, `TestTypeInfo` a__Type 
+			//WHERE (substr(a.`Title`, 1) = a__Type.`Name`);
+			data.Add(select.Where(a => (a.Title.Substring(0) + "aaa").Substring(a.Title.Length) == "aaa").ToList());
+			data.Add(select.Where(a => (a.Title.Substring(0) + "aaa").Substring(0, a.Title.Length) == a.Title).ToList());
+			data.Add(select.Where(a => (a.Title.Substring(0) + "aaa").Substring(0, 3) == (a.Title + 1)).ToList());
+			data.Add(select.Where(a => (a.Title.Substring(0) + "aaa").Substring(1, 2) == a.Type.Name).ToList());
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic` a 
+			//WHERE (substr(concat(substr(a.`Title`, 1), 'aaa'), char_length(a.`Title`) + 1) = 'aaa');
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic` a 
+			//WHERE (substr(concat(substr(a.`Title`, 1), 'aaa'), 1, char_length(a.`Title`)) = a.`Title`);
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic` a 
+			//WHERE (substr(concat(substr(a.`Title`, 1), 'aaa'), 1, 3) = concat(a.`Title`, 1));
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a.`Title` as7, a.`CreateTime` as8 
+			//FROM `tb_topic` a, `TestTypeInfo` a__Type 
+			//WHERE (substr(concat(substr(a.`Title`, 1), 'aaa'), 2, 2) = a__Type.`Name`)
+		}
+		[Fact]
+		public void Length() {
+			var data = new List<object>();
+			data.Add(select.Where(a => a.Title.Length == 0).ToList());
+			data.Add(select.Where(a => a.Title.Length == 1).ToList());
+			data.Add(select.Where(a => a.Title.Length == a.Title.Length + 1).ToList());
+			data.Add(select.Where(a => a.Title.Length == a.Type.Name.Length).ToList());
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic` a 
+			//WHERE (char_length(a.`Title`) = 0);
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic` a 
+			//WHERE (char_length(a.`Title`) = 1);
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic` a 
+			//WHERE (char_length(a.`Title`) = char_length(a.`Title`) + 1);
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a.`Title` as7, a.`CreateTime` as8 
+			//FROM `tb_topic` a, `TestTypeInfo` a__Type 
+			//WHERE (char_length(a.`Title`) = char_length(a__Type.`Name`));
+			data.Add(select.Where(a => (a.Title + "aaa").Length == 0).ToList());
+			data.Add(select.Where(a => (a.Title + "aaa").Length == 1).ToList());
+			data.Add(select.Where(a => (a.Title + "aaa").Length == a.Title.Length + 1).ToList());
+			data.Add(select.Where(a => (a.Title + "aaa").Length == a.Type.Name.Length).ToList());
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic` a 
+			//WHERE (char_length(concat(a.`Title`, 'aaa')) = 0);
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic` a 
+			//WHERE (char_length(concat(a.`Title`, 'aaa')) = 1);
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic` a 
+			//WHERE (char_length(concat(a.`Title`, 'aaa')) = char_length(a.`Title`) + 1);
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a.`Title` as7, a.`CreateTime` as8 
+			//FROM `tb_topic` a, `TestTypeInfo` a__Type 
+			//WHERE (char_length(concat(a.`Title`, 'aaa')) = char_length(a__Type.`Name`))
+		}
+		[Fact]
+		public void IndexOf() {
+			var data = new List<object>();
+			data.Add(select.Where(a => a.Title.IndexOf("aaa") == -1).ToList());
+			data.Add(select.Where(a => a.Title.IndexOf("aaa", 2) == -1).ToList());
+			data.Add(select.Where(a => a.Title.IndexOf("aaa", 2) == (a.Title.Length + 1)).ToList());
+			data.Add(select.Where(a => a.Title.IndexOf("aaa", 2) == a.Type.Name.Length + 1).ToList());
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic` a 
+			//WHERE ((locate(a.`Title`, 'aaa') - 1) = -1);
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic` a 
+			//WHERE ((locate(a.`Title`, 'aaa', 3) - 1) = -1);
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic` a 
+			//WHERE ((locate(a.`Title`, 'aaa', 3) - 1) = char_length(a.`Title`) + 1);
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a.`Title` as7, a.`CreateTime` as8 
+			//FROM `tb_topic` a, `TestTypeInfo` a__Type 
+			//WHERE ((locate(a.`Title`, 'aaa', 3) - 1) = char_length(a__Type.`Name`) + 1);
+			data.Add(select.Where(a => (a.Title + "aaa").IndexOf("aaa") == -1).ToList());
+			data.Add(select.Where(a => (a.Title + "aaa").IndexOf("aaa", 2) == -1).ToList());
+			data.Add(select.Where(a => (a.Title + "aaa").IndexOf("aaa", 2) == (a.Title.Length + 1)).ToList());
+			data.Add(select.Where(a => (a.Title + "aaa").IndexOf("aaa", 2) == a.Type.Name.Length + 1).ToList());
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic` a 
+			//WHERE ((locate(concat(a.`Title`, 'aaa'), 'aaa') - 1) = -1);
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic` a 
+			//WHERE ((locate(concat(a.`Title`, 'aaa'), 'aaa', 3) - 1) = -1);
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic` a 
+			//WHERE ((locate(concat(a.`Title`, 'aaa'), 'aaa', 3) - 1) = char_length(a.`Title`) + 1);
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a.`Title` as7, a.`CreateTime` as8 
+			//FROM `tb_topic` a, `TestTypeInfo` a__Type 
+			//WHERE ((locate(concat(a.`Title`, 'aaa'), 'aaa', 3) - 1) = char_length(a__Type.`Name`) + 1)
+		}
+		[Fact]
+		public void PadLeft() {
+			//var data = new List<object>();
+			//data.Add(select.Where(a => a.Title.PadLeft(10, 'a') == "aaa").ToList());
+			//data.Add(select.Where(a => a.Title.PadLeft(10, 'a') == a.Title).ToList());
+			//data.Add(select.Where(a => a.Title.PadLeft(10, 'a') == (a.Title + 1)).ToList());
+			//data.Add(select.Where(a => a.Title.PadLeft(10, 'a') == a.Type.Name).ToList());
+			////SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			////FROM `tb_topic` a 
+			////WHERE (lpad(a.`Title`, 10, 'a') = 'aaa');
+
+			////SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			////FROM `tb_topic` a 
+			////WHERE (lpad(a.`Title`, 10, 'a') = a.`Title`);
+
+			////SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			////FROM `tb_topic` a 
+			////WHERE (lpad(a.`Title`, 10, 'a') = concat(a.`Title`, 1));
+
+			////SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a.`Title` as7, a.`CreateTime` as8 
+			////FROM `tb_topic` a, `TestTypeInfo` a__Type 
+			////WHERE (lpad(a.`Title`, 10, 'a') = a__Type.`Name`);
+			//data.Add(select.Where(a => (a.Title.PadLeft(10, 'a') + "aaa").PadLeft(20, 'b') == "aaa").ToList());
+			//data.Add(select.Where(a => (a.Title.PadLeft(10, 'a') + "aaa").PadLeft(20, 'b') == a.Title).ToList());
+			//data.Add(select.Where(a => (a.Title.PadLeft(10, 'a') + "aaa").PadLeft(20, 'b') == (a.Title + 1)).ToList());
+			//data.Add(select.Where(a => (a.Title.PadLeft(10, 'a') + "aaa").PadLeft(20, 'b') == a.Type.Name).ToList());
+			////SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			////FROM `tb_topic` a 
+			////WHERE (lpad(concat(lpad(a.`Title`, 10, 'a'), 'aaa'), 20, 'b') = 'aaa');
+
+			////SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			////FROM `tb_topic` a 
+			////WHERE (lpad(concat(lpad(a.`Title`, 10, 'a'), 'aaa'), 20, 'b') = a.`Title`);
+
+			////SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			////FROM `tb_topic` a 
+			////WHERE (lpad(concat(lpad(a.`Title`, 10, 'a'), 'aaa'), 20, 'b') = concat(a.`Title`, 1));
+
+			////SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a.`Title` as7, a.`CreateTime` as8 
+			////FROM `tb_topic` a, `TestTypeInfo` a__Type 
+			////WHERE (lpad(concat(lpad(a.`Title`, 10, 'a'), 'aaa'), 20, 'b') = a__Type.`Name`)
+		}
+		[Fact]
+		public void PadRight() {
+			//var data = new List<object>();
+			//data.Add(select.Where(a => a.Title.PadRight(10, 'a') == "aaa").ToList());
+			//data.Add(select.Where(a => a.Title.PadRight(10, 'a') == a.Title).ToList());
+			//data.Add(select.Where(a => a.Title.PadRight(10, 'a') == (a.Title + 1)).ToList());
+			//data.Add(select.Where(a => a.Title.PadRight(10, 'a') == a.Type.Name).ToList());
+			////SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			////FROM `tb_topic` a 
+			////WHERE (rpad(a.`Title`, 10, 'a') = 'aaa');
+
+			////SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			////FROM `tb_topic` a 
+			////WHERE (rpad(a.`Title`, 10, 'a') = a.`Title`);
+
+			////SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			////FROM `tb_topic` a 
+			////WHERE (rpad(a.`Title`, 10, 'a') = concat(a.`Title`, 1));
+
+			////SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a.`Title` as7, a.`CreateTime` as8 
+			////FROM `tb_topic` a, `TestTypeInfo` a__Type 
+			////WHERE (rpad(a.`Title`, 10, 'a') = a__Type.`Name`);
+			//data.Add(select.Where(a => (a.Title.PadRight(10, 'a') + "aaa").PadRight(20, 'b') == "aaa").ToList());
+			//data.Add(select.Where(a => (a.Title.PadRight(10, 'a') + "aaa").PadRight(20, 'b') == a.Title).ToList());
+			//data.Add(select.Where(a => (a.Title.PadRight(10, 'a') + "aaa").PadRight(20, 'b') == (a.Title + 1)).ToList());
+			//data.Add(select.Where(a => (a.Title.PadRight(10, 'a') + "aaa").PadRight(20, 'b') == a.Type.Name).ToList());
+			////SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			////FROM `tb_topic` a 
+			////WHERE (rpad(concat(rpad(a.`Title`, 10, 'a'), 'aaa'), 20, 'b') = 'aaa');
+
+			////SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			////FROM `tb_topic` a 
+			////WHERE (rpad(concat(rpad(a.`Title`, 10, 'a'), 'aaa'), 20, 'b') = a.`Title`);
+
+			////SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			////FROM `tb_topic` a 
+			////WHERE (rpad(concat(rpad(a.`Title`, 10, 'a'), 'aaa'), 20, 'b') = concat(a.`Title`, 1));
+
+			////SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a.`Title` as7, a.`CreateTime` as8 
+			////FROM `tb_topic` a, `TestTypeInfo` a__Type 
+			////WHERE (rpad(concat(rpad(a.`Title`, 10, 'a'), 'aaa'), 20, 'b') = a__Type.`Name`)
+		}
+		[Fact]
+		public void Trim() {
+			var data = new List<object>();
+			data.Add(select.Where(a => a.Title.Trim() == "aaa").ToList());
+			data.Add(select.Where(a => a.Title.Trim('a') == a.Title).ToList());
+			data.Add(select.Where(a => a.Title.Trim('a', 'b') == (a.Title + 1)).ToList());
+			data.Add(select.Where(a => a.Title.Trim('a', 'b', 'c') == a.Type.Name).ToList());
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic` a 
+			//WHERE (trim(a.`Title`) = 'aaa');
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic` a 
+			//WHERE (trim('a' from a.`Title`) = a.`Title`);
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic` a 
+			//WHERE (trim('b' from trim('a' from a.`Title`)) = concat(a.`Title`, 1));
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a.`Title` as7, a.`CreateTime` as8 
+			//FROM `tb_topic` a, `TestTypeInfo` a__Type 
+			//WHERE (trim('c' from trim('b' from trim('a' from a.`Title`))) = a__Type.`Name`);
+			data.Add(select.Where(a => (a.Title.Trim() + "aaa").Trim() == "aaa").ToList());
+			data.Add(select.Where(a => (a.Title.Trim('a') + "aaa").Trim('a') == a.Title).ToList());
+			data.Add(select.Where(a => (a.Title.Trim('a', 'b') + "aaa").Trim('a', 'b') == (a.Title + 1)).ToList());
+			data.Add(select.Where(a => (a.Title.Trim('a', 'b', 'c') + "aaa").Trim('a', 'b', 'c') == a.Type.Name).ToList());
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic` a 
+			//WHERE (trim(concat(trim(a.`Title`), 'aaa')) = 'aaa');
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic` a 
+			//WHERE (trim('a' from concat(trim('a' from a.`Title`), 'aaa')) = a.`Title`);
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic` a 
+			//WHERE (trim('b' from trim('a' from concat(trim('b' from trim('a' from a.`Title`)), 'aaa'))) = concat(a.`Title`, 1));
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a.`Title` as7, a.`CreateTime` as8 
+			//FROM `tb_topic` a, `TestTypeInfo` a__Type 
+			//WHERE (trim('c' from trim('b' from trim('a' from concat(trim('c' from trim('b' from trim('a' from a.`Title`))), 'aaa')))) = a__Type.`Name`)
+		}
+		[Fact]
+		public void TrimStart() {
+			var data = new List<object>();
+			data.Add(select.Where(a => a.Title.TrimStart() == "aaa").ToList());
+			data.Add(select.Where(a => a.Title.TrimStart('a') == a.Title).ToList());
+			data.Add(select.Where(a => a.Title.TrimStart('a', 'b') == (a.Title + 1)).ToList());
+			data.Add(select.Where(a => a.Title.TrimStart('a', 'b', 'c') == a.Type.Name).ToList());
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic` a 
+			//WHERE (ltrim(a.`Title`) = 'aaa');
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic` a 
+			//WHERE (trim(trailing 'a' from trim(leading 'a' from a.`Title`)) = a.`Title`);
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic` a 
+			//WHERE (trim(trailing 'b' from trim(leading 'b' from trim(trailing 'a' from trim(leading 'a' from a.`Title`)))) = concat(a.`Title`, 1));
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a.`Title` as7, a.`CreateTime` as8 
+			//FROM `tb_topic` a, `TestTypeInfo` a__Type 
+			//WHERE (trim(trailing 'c' from trim(leading 'c' from trim(trailing 'b' from trim(leading 'b' from trim(trailing 'a' from trim(leading 'a' from a.`Title`)))))) = a__Type.`Name`);
+			data.Add(select.Where(a => (a.Title.TrimStart() + "aaa").TrimStart() == "aaa").ToList());
+			data.Add(select.Where(a => (a.Title.TrimStart('a') + "aaa").TrimStart('a') == a.Title).ToList());
+			data.Add(select.Where(a => (a.Title.TrimStart('a', 'b') + "aaa").TrimStart('a', 'b') == (a.Title + 1)).ToList());
+			data.Add(select.Where(a => (a.Title.TrimStart('a', 'b', 'c') + "aaa").TrimStart('a', 'b', 'c') == a.Type.Name).ToList());
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic` a 
+			//WHERE (ltrim(concat(ltrim(a.`Title`), 'aaa')) = 'aaa');
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic` a 
+			//WHERE (trim(trailing 'a' from trim(leading 'a' from concat(trim(trailing 'a' from trim(leading 'a' from a.`Title`)), 'aaa'))) = a.`Title`);
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic` a 
+			//WHERE (trim(trailing 'b' from trim(leading 'b' from trim(trailing 'a' from trim(leading 'a' from concat(trim(trailing 'b' from trim(leading 'b' from trim(trailing 'a' from trim(leading 'a' from a.`Title`)))), 'aaa'))))) = concat(a.`Title`, 1));
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a.`Title` as7, a.`CreateTime` as8 
+			//FROM `tb_topic` a, `TestTypeInfo` a__Type 
+			//WHERE (trim(trailing 'c' from trim(leading 'c' from trim(trailing 'b' from trim(leading 'b' from trim(trailing 'a' from trim(leading 'a' from concat(trim(trailing 'c' from trim(leading 'c' from trim(trailing 'b' from trim(leading 'b' from trim(trailing 'a' from trim(leading 'a' from a.`Title`)))))), 'aaa'))))))) = a__Type.`Name`)
+		}
+		[Fact]
+		public void TrimEnd() {
+			var data = new List<object>();
+			data.Add(select.Where(a => a.Title.TrimEnd() == "aaa").ToList());
+			data.Add(select.Where(a => a.Title.TrimEnd('a') == a.Title).ToList());
+			data.Add(select.Where(a => a.Title.TrimEnd('a', 'b') == (a.Title + 1)).ToList());
+			data.Add(select.Where(a => a.Title.TrimEnd('a', 'b', 'c') == a.Type.Name).ToList());
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic` a 
+			//WHERE (rtrim(a.`Title`) = 'aaa');
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic` a 
+			//WHERE (trim(trailing 'a' from a.`Title`) = a.`Title`);
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic` a 
+			//WHERE (trim(trailing 'b' from trim(trailing 'a' from a.`Title`)) = concat(a.`Title`, 1));
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a.`Title` as7, a.`CreateTime` as8 
+			//FROM `tb_topic` a, `TestTypeInfo` a__Type 
+			//WHERE (trim(trailing 'c' from trim(trailing 'b' from trim(trailing 'a' from a.`Title`))) = a__Type.`Name`);
+			data.Add(select.Where(a => (a.Title.TrimEnd() + "aaa").TrimEnd() == "aaa").ToList());
+			data.Add(select.Where(a => (a.Title.TrimEnd('a') + "aaa").TrimEnd('a') == a.Title).ToList());
+			data.Add(select.Where(a => (a.Title.TrimEnd('a', 'b') + "aaa").TrimEnd('a', 'b') == (a.Title + 1)).ToList());
+			data.Add(select.Where(a => (a.Title.TrimEnd('a', 'b', 'c') + "aaa").TrimEnd('a', 'b', 'c') == a.Type.Name).ToList());
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic` a 
+			//WHERE (rtrim(concat(rtrim(a.`Title`), 'aaa')) = 'aaa');
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic` a 
+			//WHERE (trim(trailing 'a' from concat(trim(trailing 'a' from a.`Title`), 'aaa')) = a.`Title`);
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic` a 
+			//WHERE (trim(trailing 'b' from trim(trailing 'a' from concat(trim(trailing 'b' from trim(trailing 'a' from a.`Title`)), 'aaa'))) = concat(a.`Title`, 1));
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a.`Title` as7, a.`CreateTime` as8 
+			//FROM `tb_topic` a, `TestTypeInfo` a__Type 
+			//WHERE (trim(trailing 'c' from trim(trailing 'b' from trim(trailing 'a' from concat(trim(trailing 'c' from trim(trailing 'b' from trim(trailing 'a' from a.`Title`))), 'aaa')))) = a__Type.`Name`)
+		}
+		[Fact]
+		public void Replace() {
+			var data = new List<object>();
+			data.Add(select.Where(a => a.Title.Replace("a", "b") == "aaa").ToList());
+			data.Add(select.Where(a => a.Title.Replace("a", "b").Replace("b", "c") == a.Title).ToList());
+			data.Add(select.Where(a => a.Title.Replace("a", "b").Replace("b", "c").Replace("c", "a") == (a.Title + 1)).ToList());
+			data.Add(select.Where(a => a.Title.Replace("a", "b").Replace("b", "c").Replace(a.Type.Name, "a") == a.Type.Name).ToList());
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic` a 
+			//WHERE (replace(a.`Title`, 'a', 'b') = 'aaa');
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic` a 
+			//WHERE (replace(replace(a.`Title`, 'a', 'b'), 'b', 'c') = a.`Title`);
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic` a 
+			//WHERE (replace(replace(replace(a.`Title`, 'a', 'b'), 'b', 'c'), 'c', 'a') = concat(a.`Title`, 1));
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a.`Title` as7, a.`CreateTime` as8 
+			//FROM `tb_topic` a, `TestTypeInfo` a__Type 
+			//WHERE (replace(replace(replace(a.`Title`, 'a', 'b'), 'b', 'c'), a__Type.`Name`, 'a') = a__Type.`Name`);
+			data.Add(select.Where(a => (a.Title.Replace("a", "b") + "aaa").TrimEnd() == "aaa").ToList());
+			data.Add(select.Where(a => (a.Title.Replace("a", "b").Replace("b", "c") + "aaa").TrimEnd('a') == a.Title).ToList());
+			data.Add(select.Where(a => (a.Title.Replace("a", "b").Replace("b", "c").Replace("c", "a") + "aaa").TrimEnd('a', 'b') == (a.Title + 1)).ToList());
+			data.Add(select.Where(a => (a.Title.Replace("a", "b").Replace("b", "c").Replace(a.Type.Name, "a") + "aaa").TrimEnd('a', 'b', 'c') == a.Type.Name).ToList());
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic` a 
+			//WHERE (concat(replace(a.`Title`, 'a', 'b'), 'aaa') = 'aaa');
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic` a 
+			//WHERE (concat(replace(replace(a.`Title`, 'a', 'b'), 'b', 'c'), 'aaa') = a.`Title`);
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic` a 
+			//WHERE (concat(replace(replace(replace(a.`Title`, 'a', 'b'), 'b', 'c'), 'c', 'a'), 'aaa') = concat(a.`Title`, 1));
+
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a.`Title` as7, a.`CreateTime` as8 
+			//FROM `tb_topic` a, `TestTypeInfo` a__Type 
+			//WHERE (concat(replace(replace(replace(a.`Title`, 'a', 'b'), 'b', 'c'), a__Type.`Name`, 'a'), 'aaa') = a__Type.`Name`)
+		}
+		[Fact]
+		public void CompareTo() {
+			//var data = new List<object>();
+			//data.Add(select.Where(a => a.Title.CompareTo(a.Title) == 0).ToList());
+			//data.Add(select.Where(a => a.Title.CompareTo(a.Title) > 0).ToList());
+			//data.Add(select.Where(a => a.Title.CompareTo(a.Title + 1) == 0).ToList());
+			//data.Add(select.Where(a => a.Title.CompareTo(a.Title + a.Type.Name) == 0).ToList());
+			////SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			////FROM `tb_topic` a 
+			////WHERE (strcmp(a.`Title`, a.`Title`) = 0);
+
+			////SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			////FROM `tb_topic` a 
+			////WHERE (strcmp(a.`Title`, a.`Title`) > 0);
+
+			////SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			////FROM `tb_topic` a 
+			////WHERE (strcmp(a.`Title`, concat(a.`Title`, 1)) = 0);
+
+			////SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a.`Title` as7, a.`CreateTime` as8 
+			////FROM `tb_topic` a, `TestTypeInfo` a__Type 
+			////WHERE (strcmp(a.`Title`, concat(a.`Title`, a__Type.`Name`)) = 0);
+			//data.Add(select.Where(a => (a.Title + "aaa").CompareTo("aaa") == 0).ToList());
+			//data.Add(select.Where(a => (a.Title + "aaa").CompareTo(a.Title) > 0).ToList());
+			//data.Add(select.Where(a => (a.Title + "aaa").CompareTo(a.Title + 1) == 0).ToList());
+			//data.Add(select.Where(a => (a.Title + "aaa").CompareTo(a.Type.Name) == 0).ToList());
+			////SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			////FROM `tb_topic` a 
+			////WHERE (strcmp(concat(a.`Title`, 'aaa'), 'aaa') = 0);
+
+			////SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			////FROM `tb_topic` a 
+			////WHERE (strcmp(concat(a.`Title`, 'aaa'), a.`Title`) > 0);
+
+			////SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			////FROM `tb_topic` a 
+			////WHERE (strcmp(concat(a.`Title`, 'aaa'), concat(a.`Title`, 1)) = 0);
+
+			////SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a__Type.`Guid` as4, a__Type.`ParentId` as5, a__Type.`Name` as6, a.`Title` as7, a.`CreateTime` as8 
+			////FROM `tb_topic` a, `TestTypeInfo` a__Type 
+			////WHERE (strcmp(concat(a.`Title`, 'aaa'), a__Type.`Name`) = 0)
+		}
+	}
+}

FreeSql.Tests/SqlServer/SqlServerExpression/TimeSpanTest.cs

@@ -0,0 +1,260 @@
+using FreeSql.DataAnnotations;
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using Xunit;
+
+namespace FreeSql.Tests.SqlServerExpression {
+	public class TimeSpanTest {
+
+		ISelect<Topic> select => g.sqlserver.Select<Topic>();
+
+		[Table(Name = "tb_topic")]
+		class Topic {
+			[Column(IsIdentity = true, IsPrimary = true)]
+			public int Id { get; set; }
+			public int Clicks { get; set; }
+			public int TestTypeInfoGuid { get; set; }
+			public TestTypeInfo Type { get; set; }
+			public string Title { get; set; }
+			public DateTime CreateTime { get; set; }
+		}
+		class TestTypeInfo {
+			public int Guid { get; set; }
+			public int ParentId { get; set; }
+			public TestTypeParentInfo Parent { get; set; }
+			public string Name { get; set; }
+		}
+		class TestTypeParentInfo {
+			public int Id { get; set; }
+			public string Name { get; set; }
+
+			public List<TestTypeInfo> Types { get; set; }
+		}
+		[Fact]
+		public void Zero() {
+			var data = new List<object>();
+			data.Add(select.Where(a => a.CreateTime.TimeOfDay > TimeSpan.Zero).ToList());
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic` a 
+			//WHERE (timestampdiff(microsecond, date_format(a.`CreateTime`, '1970-1-1 %H:%i:%s.%f'), a.`CreateTime`) + 62135596800000000) > 0)
+		}
+		[Fact]
+		public void MinValue() {
+			var data = new List<object>();
+			data.Add(select.Where(a => a.CreateTime.TimeOfDay > TimeSpan.MinValue).ToList());
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic` a 
+			//WHERE (timestampdiff(microsecond, date_format(a.`CreateTime`, '1970-1-1 %H:%i:%s.%f'), a.`CreateTime`) + 62135596800000000) > -922337203685477580)
+		}
+		[Fact]
+		public void MaxValue() {
+			var data = new List<object>();
+			data.Add(select.Where(a => a.CreateTime.TimeOfDay < TimeSpan.MaxValue).ToList());
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic` a 
+			//WHERE (timestampdiff(microsecond, date_format(a.`CreateTime`, '1970-1-1 %H:%i:%s.%f'), a.`CreateTime`) + 62135596800000000) < 922337203685477580)
+		}
+		[Fact]
+		public void Days() {
+			var data = new List<object>();
+			data.Add(select.Where(a => a.CreateTime.TimeOfDay.Days == 0).ToList());
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic` a 
+			//WHERE (((timestampdiff(microsecond, date_format(a.`CreateTime`, '1970-1-1 %H:%i:%s.%f'), a.`CreateTime`) + 62135596800000000)) div 86400000000) = 0)
+		}
+		[Fact]
+		public void Hours() {
+			var data = new List<object>();
+			data.Add(select.Where(a => a.CreateTime.TimeOfDay.Hours > 0).ToSql());
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic` a 
+			//WHERE (((timestampdiff(microsecond, date_format(a.`CreateTime`, '1970-1-1 %H:%i:%s.%f'), a.`CreateTime`) + 62135596800000000)) div 3600000000) mod 24 > 0)
+		}
+		[Fact]
+		public void Milliseconds() {
+			var data = new List<object>();
+			data.Add(select.Where(a => a.CreateTime.TimeOfDay.Milliseconds > 0).ToList());
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic` a 
+			//WHERE (((timestampdiff(microsecond, date_format(a.`CreateTime`, '1970-1-1 %H:%i:%s.%f'), a.`CreateTime`) + 62135596800000000)) div 1000 mod 1000) > 0)
+		}
+		[Fact]
+		public void Minutes() {
+			var data = new List<object>();
+			data.Add(select.Where(a => a.CreateTime.TimeOfDay.Minutes > 0).ToList());
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic` a 
+			//WHERE (((timestampdiff(microsecond, date_format(a.`CreateTime`, '1970-1-1 %H:%i:%s.%f'), a.`CreateTime`) + 62135596800000000)) div 60000000 mod 60) > 0)
+		}
+		[Fact]
+		public void Seconds() {
+			var data = new List<object>();
+			data.Add(select.Where(a => a.CreateTime.TimeOfDay.Seconds > 0).ToList());
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic` a 
+			//WHERE (((timestampdiff(microsecond, date_format(a.`CreateTime`, '1970-1-1 %H:%i:%s.%f'), a.`CreateTime`) + 62135596800000000)) div 1000000 mod 60) > 0)
+		}
+		[Fact]
+		public void Ticks() {
+			var data = new List<object>();
+			data.Add(select.Where(a => a.CreateTime.TimeOfDay.Ticks > 0).ToList());
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic` a 
+			//WHERE (((timestampdiff(microsecond, date_format(a.`CreateTime`, '1970-1-1 %H:%i:%s.%f'), a.`CreateTime`) + 62135596800000000)) * 10) > 0)
+		}
+		[Fact]
+		public void TotalDays() {
+			var data = new List<object>();
+			data.Add(select.Where(a => a.CreateTime.TimeOfDay.TotalDays > 0).ToList());
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic` a 
+			//WHERE (((timestampdiff(microsecond, date_format(a.`CreateTime`, '1970-1-1 %H:%i:%s.%f'), a.`CreateTime`) + 62135596800000000)) / 86400000000) > 0)
+		}
+		[Fact]
+		public void TotalHours() {
+			var data = new List<object>();
+			data.Add(select.Where(a => a.CreateTime.TimeOfDay.TotalHours > 0).ToList());
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic` a 
+			//WHERE (((timestampdiff(microsecond, date_format(a.`CreateTime`, '1970-1-1 %H:%i:%s.%f'), a.`CreateTime`) + 62135596800000000)) / 3600000000) > 0)
+		}
+		[Fact]
+		public void TotalMilliseconds() {
+			var data = new List<object>();
+			data.Add(select.Where(a => a.CreateTime.TimeOfDay.TotalMilliseconds > 0).ToList());
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic` a 
+			//WHERE (((timestampdiff(microsecond, date_format(a.`CreateTime`, '1970-1-1 %H:%i:%s.%f'), a.`CreateTime`) + 62135596800000000)) / 1000) > 0)
+		}
+		[Fact]
+		public void TotalMinutes() {
+			var data = new List<object>();
+			data.Add(select.Where(a => a.CreateTime.TimeOfDay.TotalMinutes > 0).ToSql());
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic` a 
+			//WHERE (((timestampdiff(microsecond, date_format(a.`CreateTime`, '1970-1-1 %H:%i:%s.%f'), a.`CreateTime`) + 62135596800000000)) / 60000000) > 0)
+		}
+		[Fact]
+		public void TotalSeconds() {
+			var data = new List<object>();
+			data.Add(select.Where(a => a.CreateTime.TimeOfDay.TotalSeconds > 0).ToList());
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic` a 
+			//WHERE (((timestampdiff(microsecond, date_format(a.`CreateTime`, '1970-1-1 %H:%i:%s.%f'), a.`CreateTime`) + 62135596800000000)) / 1000000) > 0)
+		}
+		[Fact]
+		public void Add() {
+			var data = new List<object>();
+			data.Add(select.Where(a => a.CreateTime.TimeOfDay.Add(TimeSpan.FromDays(1)) > TimeSpan.Zero).ToList());
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic` a 
+			//WHERE ((timestampdiff(microsecond, date_format(a.`CreateTime`, '1970-1-1 %H:%i:%s.%f'), a.`CreateTime`) + 62135596800000000) + (1 * 86400000000)) > 0)
+		}
+		[Fact]
+		public void Subtract() {
+			var data = new List<object>();
+			data.Add(select.Where(a => a.CreateTime.TimeOfDay.Subtract(TimeSpan.FromDays(1)) > TimeSpan.Zero).ToList());
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic` a 
+			//WHERE ((timestampdiff(microsecond, date_format(a.`CreateTime`, '1970-1-1 %H:%i:%s.%f'), a.`CreateTime`) + 62135596800000000) - (1 * 86400000000)) > 0)
+		}
+		[Fact]
+		public void CompareTo() {
+			var data = new List<object>();
+			data.Add(select.Where(a => a.CreateTime.TimeOfDay.CompareTo(TimeSpan.FromDays(1)) > 0).ToList());
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic` a 
+			//WHERE (((timestampdiff(microsecond, date_format(a.`CreateTime`, '1970-1-1 %H:%i:%s.%f'), a.`CreateTime`) + 62135596800000000)) - ((1 * 86400000000))) > 0)
+		}
+		[Fact]
+		public void this_Equals() {
+			var data = new List<object>();
+			data.Add(select.Where(a => a.CreateTime.TimeOfDay.Equals(TimeSpan.FromDays(1))).ToList());
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic` a 
+			//WHERE ((timestampdiff(microsecond, date_format(a.`CreateTime`, '1970-1-1 %H:%i:%s.%f'), a.`CreateTime`) + 62135596800000000) = (1 * 86400000000)))
+		}
+		[Fact]
+		public void this_ToString() {
+			var data = new List<object>();
+			data.Add(select.Where(a => a.CreateTime.TimeOfDay.ToString() == "ssss").ToList());
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic` a 
+			//WHERE (date_format(date_add(cast('0001/1/1 0:00:00' as datetime), interval (timestampdiff(microsecond, date_format(a.`CreateTime`, '1970-1-1 %H:%i:%s.%f'), a.`CreateTime`) + 62135596800000000)) microsecond), '%Y-%m-%d %H:%i:%s.%f') = 'ssss')
+		}
+
+		[Fact]
+		public void TimeSpan_Compare() {
+			var data = new List<object>();
+			data.Add(select.Where(a => TimeSpan.Compare(a.CreateTime.TimeOfDay, TimeSpan.FromDays(1)) > 0).ToList());
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic` a 
+			//WHERE (((timestampdiff(microsecond, date_format(a.`CreateTime`, '1970-1-1 %H:%i:%s.%f'), a.`CreateTime`) + 62135596800000000)) - ((1 * 86400000000))) > 0)
+		}
+		[Fact]
+		public void TimeSpan_Equals() {
+			var data = new List<object>();
+			data.Add(select.Where(a => TimeSpan.Equals(a.CreateTime.TimeOfDay, TimeSpan.FromDays(1))).ToList());
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic` a 
+			//WHERE ((timestampdiff(microsecond, date_format(a.`CreateTime`, '1970-1-1 %H:%i:%s.%f'), a.`CreateTime`) + 62135596800000000) = (1 * 86400000000)))
+		}
+		[Fact]
+		public void TimeSpan_FromDays() {
+			var data = new List<object>();
+			data.Add(select.Where(a => TimeSpan.Equals(a.CreateTime.TimeOfDay, TimeSpan.FromDays(1))).ToList());
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic` a 
+			//WHERE ((timestampdiff(microsecond, date_format(a.`CreateTime`, '1970-1-1 %H:%i:%s.%f'), a.`CreateTime`) + 62135596800000000) = (1 * 86400000000)))
+		}
+		[Fact]
+		public void TimeSpan_FromHours() {
+			var data = new List<object>();
+			data.Add(select.Where(a => TimeSpan.Equals(a.CreateTime.TimeOfDay, TimeSpan.FromHours(1))).ToList());
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic` a 
+			//WHERE ((timestampdiff(microsecond, date_format(a.`CreateTime`, '1970-1-1 %H:%i:%s.%f'), a.`CreateTime`) + 62135596800000000) = (1 * 3600000000)))
+		}
+		[Fact]
+		public void TimeSpan_FromMilliseconds() {
+			var data = new List<object>();
+			data.Add(select.Where(a => TimeSpan.Equals(a.CreateTime.TimeOfDay, TimeSpan.FromMilliseconds(1))).ToList());
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic` a 
+			//WHERE ((timestampdiff(microsecond, date_format(a.`CreateTime`, '1970-1-1 %H:%i:%s.%f'), a.`CreateTime`) + 62135596800000000) = (1 * 1000)))
+		}
+		[Fact]
+		public void TimeSpan_FromMinutes() {
+			var data = new List<object>();
+			data.Add(select.Where(a => TimeSpan.Equals(a.CreateTime.TimeOfDay, TimeSpan.FromMinutes(1))).ToList());
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic` a 
+			//WHERE ((timestampdiff(microsecond, date_format(a.`CreateTime`, '1970-1-1 %H:%i:%s.%f'), a.`CreateTime`) + 62135596800000000) = (1 * 60000000)))
+		}
+		[Fact]
+		public void TimeSpan_FromSeconds() {
+			var data = new List<object>();
+			data.Add(select.Where(a => TimeSpan.Equals(a.CreateTime.TimeOfDay, TimeSpan.FromSeconds(1))).ToList());
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic` a 
+			//WHERE ((timestampdiff(microsecond, date_format(a.`CreateTime`, '1970-1-1 %H:%i:%s.%f'), a.`CreateTime`) + 62135596800000000) = (1 * 1000000)))
+		}
+		[Fact]
+		public void TimeSpan_FromTicks() {
+			var data = new List<object>();
+			data.Add(select.Where(a => TimeSpan.Equals(a.CreateTime.TimeOfDay, TimeSpan.FromTicks(1))).ToList());
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic` a 
+			//WHERE ((timestampdiff(microsecond, date_format(a.`CreateTime`, '1970-1-1 %H:%i:%s.%f'), a.`CreateTime`) + 62135596800000000) = (1 / 10)))
+		}
+		[Fact]
+		public void TimeSpan_Parse() {
+			var data = new List<object>();
+			data.Add(select.Where(a => TimeSpan.Parse(a.CreateTime.TimeOfDay.ToString()) > TimeSpan.Zero).ToList());
+			//SELECT a.`Id` as1, a.`Clicks` as2, a.`TestTypeInfoGuid` as3, a.`Title` as4, a.`CreateTime` as5 
+			//FROM `tb_topic` a 
+			//WHERE (cast(date_format(date_add(cast('0001/1/1 0:00:00' as datetime), interval (timestampdiff(microsecond, date_format(a.`CreateTime`, '1970-1-1 %H:%i:%s.%f'), a.`CreateTime`) + 62135596800000000)) microsecond), '%Y-%m-%d %H:%i:%s.%f') as signed) > 0)
+		}
+	}
+}

FreeSql/MySql/MySqlCodeFirst.cs

@@ -3,6 +3,7 @@ using FreeSql.Internal;
 using FreeSql.Internal.Model;
 using MySql.Data.MySqlClient;
 using System;
+using System.Collections.Concurrent;
 using System.Collections.Generic;
 using System.Data;
 using System.Linq;
@@ -169,7 +170,7 @@ where a.table_schema in ({0}) and a.table_name in ({1})".FormatMySql(isRenameTab
 			return sb.Length == 0 ? null : sb.ToString();
 		}
 
-		Dictionary<string, bool> dicSyced = new Dictionary<string, bool>();
+		ConcurrentDictionary<string, bool> dicSyced = new ConcurrentDictionary<string, bool>();
 		public bool SyncStructure<TEntity>() => this.SyncStructure(typeof(TEntity));
 		public bool SyncStructure(params Type[] entityTypes) {
 			if (entityTypes == null) return true;
@@ -177,16 +178,12 @@ where a.table_schema in ({0}) and a.table_name in ({1})".FormatMySql(isRenameTab
 			if (syncTypes.Any() == false) return true;
 			var ddl = this.GetComparisonDDLStatements(syncTypes);
 			if (string.IsNullOrEmpty(ddl)) {
-				foreach (var syncType in syncTypes) dicSyced.Add(syncType.FullName, true);
+				foreach (var syncType in syncTypes) dicSyced.TryAdd(syncType.FullName, true);
 				return true;
 			}
-			try {
+			var affrows = _orm.Ado.ExecuteNonQuery(CommandType.Text, ddl);
-				var affrows = _orm.Ado.ExecuteNonQuery(CommandType.Text, ddl);
+			foreach (var syncType in syncTypes) dicSyced.TryAdd(syncType.FullName, true);
-				foreach (var syncType in syncTypes) dicSyced.Add(syncType.FullName, true);
+			return affrows > 0;
-				return affrows > 0;
-			} catch {
-				return false;
-			}
 		}
 
 	}

FreeSql/MySql/MySqlExpression.cs

@@ -37,7 +37,7 @@ namespace FreeSql.MySql {
 			var left = ExpressionLambdaToSql(exp.Expression, _tables, _selectColumnMap, tbtype, isQuoteName);
 			switch (exp.Member.Name) {
 				case "Date": return $"cast(date_format({left}, '%Y-%m-%d') as datetime)";
-				case "TimeOfDay": return $"(time_to_sec(date_format({left}, '1970-1-1 %H:%i:%s.%f')) * 1000000 + microsecond({left}) + 6213559680000000)";
+				case "TimeOfDay": return $"(timestampdiff(microsecond, date_format({left}, '1970-1-1 %H:%i:%s.%f'), {left}) + 62135596800000000)";
 				case "DayOfWeek": return $"(dayofweek({left}) - 1)";
 				case "Day": return $"dayofmonth({left})";
 				case "DayOfYear": return $"dayofyear({left})";
@@ -47,7 +47,7 @@ namespace FreeSql.MySql {
 				case "Minute": return $"minute({left})";
 				case "Second": return $"second({left})";
 				case "Millisecond": return $"floor(microsecond({left}) / 1000)";
-				case "Ticks": return $"(time_to_sec({left}) * 10000000 + microsecond({left}) * 10 + 62135596800000000)";
+				case "Ticks": return $"(timestampdiff(microsecond, '1970-1-1', {left}) * 10 + 621355968000000000)";
 			}
 			return null;
 		}
@@ -196,7 +196,7 @@ namespace FreeSql.MySql {
 				case "AddYears": return $"date_add({left}, interval ({args1}) year)";
 				case "Subtract":
 					if (exp.Arguments[0].Type.FullName == "System.DateTime" || exp.Arguments[0].Type.GenericTypeArguments.FirstOrDefault()?.FullName == "System.DateTime")
-						return $"((time_to_sec({left}) - time_to_sec({args1})) * 1000000 + microsecond({left}) - microsecond({args1}))";
+						return $"timestampdiff(microsecond, {args1}, {left})";
 					if (exp.Arguments[0].Type.FullName == "System.TimeSpan" || exp.Arguments[0].Type.GenericTypeArguments.FirstOrDefault()?.FullName == "System.TimeSpan")
 						return $"date_sub({left}, interval ({args1}) microsecond)";
 					break;
@@ -231,7 +231,7 @@ namespace FreeSql.MySql {
 				case "Subtract": return $"({left} - {args1})";
 				case "Equals": return $"({left} = {ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, tbtype, isQuoteName)})";
 				case "CompareTo": return $"(({left}) - ({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, tbtype, isQuoteName)}))";
-				case "ToString": return $"date_format(date_add(cast('0001/1/1 0:00:00' as datetime), interval ({left}) microsecond), '%Y-%m-%d %H:%i:%s.%f')";
+				case "ToString": return $"cast({left} as varchar)";
 			}
 			throw new Exception($"MySqlExpression 未现实函数表达式 {exp} 解析");
 			

FreeSql/PostgreSQL/PostgreSQLCodeFirst.cs

@@ -6,6 +6,7 @@ using Npgsql.LegacyPostgis;
 using NpgsqlTypes;
 using System;
 using System.Collections;
+using System.Collections.Concurrent;
 using System.Collections.Generic;
 using System.Data;
 using System.Linq;
@@ -218,7 +219,7 @@ where ns.nspname = {0} and c.relname = {1}".FormatPostgreSQL(isRenameTable ? tbo
 			return sb.Length == 0 ? null : sb.ToString();
 		}
 
-		Dictionary<string, bool> dicSyced = new Dictionary<string, bool>();
+		ConcurrentDictionary<string, bool> dicSyced = new ConcurrentDictionary<string, bool>();
 		public bool SyncStructure<TEntity>() => this.SyncStructure(typeof(TEntity));
 		public bool SyncStructure(params Type[] entityTypes) {
 			if (entityTypes == null) return true;
@@ -226,16 +227,12 @@ where ns.nspname = {0} and c.relname = {1}".FormatPostgreSQL(isRenameTable ? tbo
 			if (syncTypes.Any() == false) return true;
 			var ddl = this.GetComparisonDDLStatements(syncTypes);
 			if (string.IsNullOrEmpty(ddl)) {
-				foreach (var syncType in syncTypes) dicSyced.Add(syncType.FullName, true);
+				foreach (var syncType in syncTypes) dicSyced.TryAdd(syncType.FullName, true);
 				return true;
 			}
-			try {
+			var affrows = _orm.Ado.ExecuteNonQuery(CommandType.Text, ddl);
-				var affrows = _orm.Ado.ExecuteNonQuery(CommandType.Text, ddl);
+			foreach (var syncType in syncTypes) dicSyced.TryAdd(syncType.FullName, true);
-				foreach (var syncType in syncTypes) dicSyced.Add(syncType.FullName, true);
+			return affrows > 0;
-				return affrows > 0;
-			} catch {
-				return false;
-			}
 		}
 
 	}

FreeSql/SqlServer/SqlServerAdo/SqlServerAdo.cs

@@ -36,13 +36,11 @@ namespace FreeSql.SqlServer {
 				return string.Concat("'", ((DateTime)param).ToString("yyyy-MM-dd HH:mm:ss.fff"), "'");
 			else if (param is DateTime?)
 				return string.Concat("'", (param as DateTime?).Value.ToString("yyyy-MM-dd HH:mm:ss.fff"), "'");
-			else if (param is TimeSpan) {
+			else if (param is TimeSpan)
-				var ts = (TimeSpan)param;
+				return ((TimeSpan)param).Ticks / 10;
-				return string.Concat("'", dt1970.Add(ts).ToString("yyyy-MM-dd HH:mm:ss.fff"), "'");
+			else if (param is TimeSpan?)
-			} else if (param is TimeSpan) {
+				return (param as TimeSpan?).Value.Ticks / 10;
-				var ts = (param as TimeSpan?).Value;
+			else if (param is IEnumerable) {
-				return string.Concat("'", dt1970.Add(ts).ToString("yyyy-MM-dd HH:mm:ss.fff"), "'");
-			} else if (param is IEnumerable) {
 				var sb = new StringBuilder();
 				var ie = param as IEnumerable;
 				foreach (var z in ie) sb.Append(",").Append(AddslashesProcessParam(z));

FreeSql/SqlServer/SqlServerCodeFirst.cs

@@ -3,6 +3,7 @@ using FreeSql.Internal;
 using FreeSql.Internal.Model;
 using System;
 using System.Collections.Generic;
+using System.Collections.Concurrent;
 using System.Data;
 using System.Linq;
 using System.Text;
@@ -148,11 +149,13 @@ where a.object_id in (object_id(N'[{0}].[{1}]'))", isRenameTable ? tboldname : t
 						sb.Append(_commonUtils.FormatSql("EXEC sp_rename {0}, {1}, 'COLUMN';\r\n", $"{tbname[0]}.{tbname[1]}.{addcol.Attribute.OldName}", addcol.Attribute.Name));
 						sb.Append("ALTER TABLE ").Append(_commonUtils.QuoteSqlName($"{tbname[0]}.{tbname[1]}")).Append(" ALTER COLUMN ").Append(_commonUtils.QuoteSqlName(addcol.Attribute.Name)).Append(" ").Append(addcol.Attribute.DbType.ToUpper());
 						if (addcol.Attribute.IsIdentity && addcol.Attribute.DbType.IndexOf("identity", StringComparison.CurrentCultureIgnoreCase) == -1) sb.Append(" identity(1,1)");
+						if (addcol.Attribute.DbType.ToUpper().Contains("NOT NULL")) sb.Append(_commonUtils.FormatSql(" default({0})", Activator.CreateInstance(addcol.CsType.GenericTypeArguments.FirstOrDefault() ?? addcol.CsType)));
 						sb.Append(";\r\n");
 
 					} else { //添加列
 						sb.Append("ALTER TABLE ").Append(_commonUtils.QuoteSqlName($"{tbname[0]}.{tbname[1]}")).Append(" ADD ").Append(_commonUtils.QuoteSqlName(addcol.Attribute.Name)).Append(" ").Append(addcol.Attribute.DbType.ToUpper());
 						if (addcol.Attribute.IsIdentity && addcol.Attribute.DbType.IndexOf("identity", StringComparison.CurrentCultureIgnoreCase) == -1) sb.Append(" identity(1,1)");
+						if (addcol.Attribute.DbType.ToUpper().Contains("NOT NULL")) sb.Append(_commonUtils.FormatSql(" default({0})", Activator.CreateInstance(addcol.CsType.GenericTypeArguments.FirstOrDefault() ?? addcol.CsType)));
 						sb.Append(";\r\n");
 					}
 				}
@@ -160,7 +163,7 @@ where a.object_id in (object_id(N'[{0}].[{1}]'))", isRenameTable ? tboldname : t
 			return sb.Length == 0 ? null : sb.ToString();
 		}
 
-		Dictionary<string, bool> dicSyced = new Dictionary<string, bool>();
+		ConcurrentDictionary<string, bool> dicSyced = new ConcurrentDictionary<string, bool>();
 		public bool SyncStructure<TEntity>() => this.SyncStructure(typeof(TEntity));
 		public bool SyncStructure(params Type[] entityTypes) {
 			if (entityTypes == null) return true;
@@ -168,16 +171,12 @@ where a.object_id in (object_id(N'[{0}].[{1}]'))", isRenameTable ? tboldname : t
 			if (syncTypes.Any() == false) return true;
 			var ddl = this.GetComparisonDDLStatements(syncTypes);
 			if (string.IsNullOrEmpty(ddl)) {
-				foreach (var syncType in syncTypes) dicSyced.Add(syncType.FullName, true);
+				foreach (var syncType in syncTypes) dicSyced.TryAdd(syncType.FullName, true);
 				return true;
 			}
-			try {
+			var affrows = _orm.Ado.ExecuteNonQuery(CommandType.Text, ddl);
-				var affrows = _orm.Ado.ExecuteNonQuery(CommandType.Text, ddl);
+			foreach (var syncType in syncTypes) dicSyced.TryAdd(syncType.FullName, true);
-				foreach (var syncType in syncTypes) dicSyced.Add(syncType.FullName, true);
+			return affrows > 0;
-				return affrows > 0;
-			} catch {
-				return false;
-			}
 		}
 
 	}

FreeSql/SqlServer/SqlServerExpression.cs

@@ -21,19 +21,23 @@ namespace FreeSql.SqlServer {
 			switch (exp.Member.Name) {
 				case "Length": return $"len({left})";
 			}
-			throw new Exception($"SqlServerExpression 未现实函数表达式 {exp} 解析");
+			return null;
 		}
 		internal override string ExpressionLambdaToSqlMemberAccessDateTime(MemberExpression exp, List<SelectTableInfo> _tables, List<SelectColumnInfo> _selectColumnMap, SelectTableInfoType tbtype, bool isQuoteName) {
 			if (exp.Expression == null) {
 				switch (exp.Member.Name) {
 					case "Now": return "getdate()";
 					case "UtcNow": return "getutcdate()";
-					case "Today": return "cast(convert(char(10),getdate(),120) as date)()";
+					case "Today": return "convert(char(10),getdate(),120)";
+					case "MinValue": return "'1753/1/1 0:00:00'";
+					case "MaxValue": return "'9999/12/31 23:59:59'";
 				}
 				return null;
 			}
 			var left = ExpressionLambdaToSql(exp.Expression, _tables, _selectColumnMap, tbtype, isQuoteName);
 			switch (exp.Member.Name) {
+				case "Date": return $"convert(char(10),{left},120)";
+				case "TimeOfDay": return $"(datediff(millisecond, '1970-1-1 ' + convert(varchar, {left}, 14), {left}) * 1000 + 62135596800000000)";
 				case "DayOfWeek": return $"(datepart(weekday, {left}) - 1)";
 				case "Day": return $"datepart(day, {left})";
 				case "DayOfYear": return $"datepart(dayofyear, {left})";
@@ -43,26 +47,34 @@ namespace FreeSql.SqlServer {
 				case "Minute": return $"datepart(minute, {left})";
 				case "Second": return $"datepart(second, {left})";
 				case "Millisecond": return $"datepart(millisecond, {left})";
-				case "Ticks": return $"(datediff(second, '1970-1-1', {left}) * 10000000 + 621355968000000000)";
+				case "Ticks": return $"(datediff(millisecond, '1970-1-1', {left}) * 10000 + 621355968000000000)";
 			}
-			throw new Exception($"SqlServerExpression 未现实函数表达式 {exp} 解析");
+			return null;
 		}
 		internal override string ExpressionLambdaToSqlMemberAccessTimeSpan(MemberExpression exp, List<SelectTableInfo> _tables, List<SelectColumnInfo> _selectColumnMap, SelectTableInfoType tbtype, bool isQuoteName) {
+			if (exp.Expression == null) {
+				switch (exp.Member.Name) {
+					case "Zero": return "0";
+					case "MinValue": return "-922337203685477580"; //微秒 Ticks / 10
+					case "MaxValue": return "922337203685477580";
+				}
+				return null;
+			}
 			var left = ExpressionLambdaToSql(exp.Expression, _tables, _selectColumnMap, tbtype, isQuoteName);
 			switch (exp.Member.Name) {
-				case "Days": return $"datediff(day, '1970-1-1', {left})";
+				case "Days": return $"(({left}) div {(long)1000000 * 60 * 60 * 24})";
-				case "Hours": return $"datepart(hour, '1970-1-1', {left})";
+				case "Hours": return $"(({left}) div {(long)1000000 * 60 * 60} mod 24)";
-				case "Milliseconds": return $"datepart(millisecond, {left})";
+				case "Milliseconds": return $"(({left}) div 1000 mod 1000)";
-				case "Minutes": return $"datepart(minute, {left})";
+				case "Minutes": return $"(({left}) div {(long)1000000 * 60} mod 60)";
-				case "Seconds": return $"datepart(second, {left})";
+				case "Seconds": return $"(({left}) div 1000000 mod 60)";
-				case "Ticks": return $"(datediff(millisecond, '1970-1-1', {left}) * 10000)";
+				case "Ticks": return $"(({left}) * 10)";
-				case "TotalDays": return $"datediff(day, '1970-1-1', {left})";
+				case "TotalDays": return $"(({left}) / {(long)1000000 * 60 * 60 * 24})";
-				case "TotalHours": return $"datediff(hour, '1970-1-1', {left})";
+				case "TotalHours": return $"(({left}) / {(long)1000000 * 60 * 60})";
-				case "TotalMilliseconds": return $"datediff(millisecond, '1970-1-1', {left})";
+				case "TotalMilliseconds": return $"(({left}) / 1000)";
-				case "TotalMinutes": return $"datediff(minute, '1970-1-1', {left})";
+				case "TotalMinutes": return $"(({left}) / {(long)1000000 * 60})";
-				case "TotalSeconds": return $"datediff(second, '1970-1-1', {left})";
+				case "TotalSeconds": return $"(({left}) / 1000000)";
 			}
-			throw new Exception($"SqlServerExpression 未现实函数表达式 {exp} 解析");
+			return null;
 		}
 
 		internal override string ExpressionLambdaToSqlCallString(MethodCallExpression exp, List<SelectTableInfo> _tables, List<SelectColumnInfo> _selectColumnMap, SelectTableInfoType tbtype, bool isQuoteName) {
@@ -83,12 +95,12 @@ namespace FreeSql.SqlServer {
 					var substrArgs1 = ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, tbtype, isQuoteName);
 					if (long.TryParse(substrArgs1, out var testtrylng1)) substrArgs1 = (testtrylng1 + 1).ToString();
 					else substrArgs1 += " + 1";
-					if (exp.Arguments.Count == 1) return $"substring({left}, {substrArgs1})";
+					if (exp.Arguments.Count == 1) return $"left({left}, {substrArgs1})";
 					return $"substring({left}, {substrArgs1}, {ExpressionLambdaToSql(exp.Arguments[1], _tables, _selectColumnMap, tbtype, isQuoteName)})";
 				case "IndexOf":
 					var indexOfFindStr = ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, tbtype, isQuoteName);
 					if (exp.Arguments.Count > 1 && exp.Arguments[1].Type.FullName == "System.Int32") return $"(charindex({left}, {indexOfFindStr}, {ExpressionLambdaToSql(exp.Arguments[1], _tables, _selectColumnMap, tbtype, isQuoteName)} + 1) - 1)";
-					return $"(locate({left}, {indexOfFindStr}) - 1)";
+					return $"(charindex({left}, {indexOfFindStr}) - 1)";
 				case "PadLeft":
 					if (exp.Arguments.Count == 1) return $"lpad({left}, {ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, tbtype, isQuoteName)})";
 					return $"lpad({left}, {ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, tbtype, isQuoteName)}, {ExpressionLambdaToSql(exp.Arguments[1], _tables, _selectColumnMap, tbtype, isQuoteName)})";
@@ -99,7 +111,8 @@ namespace FreeSql.SqlServer {
 				case "TrimStart": return $"ltrim({left})";
 				case "TrimEnd": return $"rtrim({left})";
 				case "Replace": return $"replace({left}, {ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, tbtype, isQuoteName)}, {ExpressionLambdaToSql(exp.Arguments[1], _tables, _selectColumnMap, tbtype, isQuoteName)})";
-				case "CompareTo": return $"strcmp({left}, {ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, tbtype, isQuoteName)})";
+				case "CompareTo": return $"({left} - {ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, tbtype, isQuoteName)})";
+				case "Equals": return $"({left} = {ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, tbtype, isQuoteName)})";
 			}
 			throw new Exception($"SqlServerExpression 未现实函数表达式 {exp} 解析");
 		}
@@ -111,7 +124,7 @@ namespace FreeSql.SqlServer {
 				case "Ceiling": return $"ceiling({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, tbtype, isQuoteName)})";
 				case "Round":
 					if (exp.Arguments.Count > 1 && exp.Arguments[1].Type.FullName == "System.Int32") return $"round({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, tbtype, isQuoteName)}, {ExpressionLambdaToSql(exp.Arguments[1], _tables, _selectColumnMap, tbtype, isQuoteName)})";
-					return $"round({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, tbtype, isQuoteName)})";
+					return $"round({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, tbtype, isQuoteName)}, 0)";
 				case "Exp": return $"exp({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, tbtype, isQuoteName)})";
 				case "Log": return $"log({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, tbtype, isQuoteName)})";
 				case "Log10": return $"log10({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, tbtype, isQuoteName)})";
@@ -124,15 +137,32 @@ namespace FreeSql.SqlServer {
 				case "Asin": return $"asin({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, tbtype, isQuoteName)})";
 				case "Atan": return $"atan({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, tbtype, isQuoteName)})";
 				case "Atan2": return $"atan2({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, tbtype, isQuoteName)}, {ExpressionLambdaToSql(exp.Arguments[1], _tables, _selectColumnMap, tbtype, isQuoteName)})";
-				case "Truncate": return $"floor({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, tbtype, isQuoteName)}, 0)";
+				case "Truncate": return $"floor({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, tbtype, isQuoteName)})";
 			}
 			throw new Exception($"SqlServerExpression 未现实函数表达式 {exp} 解析");
 		}
 		internal override string ExpressionLambdaToSqlCallDateTime(MethodCallExpression exp, List<SelectTableInfo> _tables, List<SelectColumnInfo> _selectColumnMap, SelectTableInfoType tbtype, bool isQuoteName) {
+			if (exp.Object == null) {
+				switch (exp.Method.Name) {
+					case "Compare": return $"(({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, tbtype, isQuoteName)}) - ({ExpressionLambdaToSql(exp.Arguments[1], _tables, _selectColumnMap, tbtype, isQuoteName)}))";
+					case "DaysInMonth": return $"datepart(day, dateadd(day, -1, dateadd(month, 1, cast({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, tbtype, isQuoteName)} as varchar) + '-' + cast({ExpressionLambdaToSql(exp.Arguments[1], _tables, _selectColumnMap, tbtype, isQuoteName)} as varchar) + '-1')))";
+					case "Equals": return $"({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, tbtype, isQuoteName)} = {ExpressionLambdaToSql(exp.Arguments[1], _tables, _selectColumnMap, tbtype, isQuoteName)})";
+
+					case "IsLeapYear":
+						var isLeapYearArgs1 = ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, tbtype, isQuoteName);
+						return $"(({isLeapYearArgs1}) % 4 = 0 AND ({isLeapYearArgs1}) % 100 <> 0 OR ({isLeapYearArgs1}) % 400 = 0)";
+
+					case "Parse": return $"cast({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, tbtype, isQuoteName)} as datetime)";
+					case "ParseExact":
+					case "TryParse":
+					case "TryParseExact": return $"cast({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, tbtype, isQuoteName)} as datetime)";
+				}
+				return null;
+			}
 			var left = ExpressionLambdaToSql(exp.Object, _tables, _selectColumnMap, tbtype, isQuoteName);
-			var args1 = ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, tbtype, isQuoteName);
+			var args1 = exp.Arguments.Count == 0 ? null : ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, tbtype, isQuoteName);
 			switch (exp.Method.Name) {
-				case "Add": return $"dateadd(millisecond, datediff(millisecond, '1970-1-1', {args1}), {left})";
+				case "Add": return $"dateadd(millisecond, {args1} / 1000, {left})";
 				case "AddDays": return $"dateadd(day, {args1}, {left})";
 				case "AddHours": return $"dateadd(hour, {args1}, {left})";
 				case "AddMilliseconds": return $"dateadd(millisecond, {args1}, {left})";
@@ -141,16 +171,44 @@ namespace FreeSql.SqlServer {
 				case "AddSeconds": return $"dateadd(second, {args1}, {left})";
 				case "AddTicks": return $"dateadd(millisecond, {args1} / 10000, {left})";
 				case "AddYears": return $"dateadd(year, {args1}, {left})";
-				case "Subtract": return $"dateadd(millisecond, -datediff(millisecond, '1970-1-1', {args1}), {left})";
+				case "Subtract":
+					if (exp.Arguments[0].Type.FullName == "System.DateTime" || exp.Arguments[0].Type.GenericTypeArguments.FirstOrDefault()?.FullName == "System.DateTime")
+						return $"(datediff(millisecond, {args1}, {left}) * 1000)";
+					if (exp.Arguments[0].Type.FullName == "System.TimeSpan" || exp.Arguments[0].Type.GenericTypeArguments.FirstOrDefault()?.FullName == "System.TimeSpan")
+						return $"dateadd(millisecond, {args1} / -1000, {left})";
+					break;
+				case "Equals": return $"({left} = {ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, tbtype, isQuoteName)})";
+				case "CompareTo": return $"(({left}) - ({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, tbtype, isQuoteName)}))";
+				case "ToString": return $"convert(varchar, {left}, 121)";
 			}
 			throw new Exception($"SqlServerExpression 未现实函数表达式 {exp} 解析");
 		}
 		internal override string ExpressionLambdaToSqlCallTimeSpan(MethodCallExpression exp, List<SelectTableInfo> _tables, List<SelectColumnInfo> _selectColumnMap, SelectTableInfoType tbtype, bool isQuoteName) {
+			if (exp.Object == null) {
+				switch (exp.Method.Name) {
+					case "Compare": return $"(({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, tbtype, isQuoteName)}) - ({ExpressionLambdaToSql(exp.Arguments[1], _tables, _selectColumnMap, tbtype, isQuoteName)}))";
+					case "Equals": return $"({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, tbtype, isQuoteName)} = {ExpressionLambdaToSql(exp.Arguments[1], _tables, _selectColumnMap, tbtype, isQuoteName)})";
+					case "FromDays": return $"({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, tbtype, isQuoteName)} * {(long)1000000 * 60 * 60 * 24})";
+					case "FromHours": return $"({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, tbtype, isQuoteName)} * {(long)1000000 * 60 * 60})";
+					case "FromMilliseconds": return $"({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, tbtype, isQuoteName)} * 1000)";
+					case "FromMinutes": return $"({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, tbtype, isQuoteName)} * {(long)1000000 * 60})";
+					case "FromSeconds": return $"({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, tbtype, isQuoteName)} * 1000000)";
+					case "FromTicks": return $"({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, tbtype, isQuoteName)} / 10)";
+					case "Parse": return $"cast({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, tbtype, isQuoteName)} as bigint)";
+					case "ParseExact":
+					case "TryParse":
+					case "TryParseExact": return $"cast({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, tbtype, isQuoteName)} as bigint)";
+				}
+				return null;
+			}
 			var left = ExpressionLambdaToSql(exp.Object, _tables, _selectColumnMap, tbtype, isQuoteName);
-			var args1 = ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, tbtype, isQuoteName);
+			var args1 = exp.Arguments.Count == 0 ? null : ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, tbtype, isQuoteName);
 			switch (exp.Method.Name) {
-				case "Add": return $"dateadd(millisecond, datediff(millisecond, '1970-1-1', {args1}), {left})";
+				case "Add": return $"({left} + {args1})";
-				case "Subtract": return $"dateadd(millisecond, -datediff(millisecond, '1970-1-1', {args1}), {left})";
+				case "Subtract": return $"({left} - {args1})";
+				case "Equals": return $"({left} = {ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, tbtype, isQuoteName)})";
+				case "CompareTo": return $"(({left}) - ({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, tbtype, isQuoteName)}))";
+				case "ToString": return $"cast({left} as varchar)";
 			}
 			throw new Exception($"SqlServerExpression 未现实函数表达式 {exp} 解析");
 		}