using FreeSql.Internal; using FreeSql.Internal.Model; using System; using System.Collections; using System.Collections.Generic; using System.Linq; using System.Linq.Expressions; using System.Text; namespace FreeSql.SqlServer { class SqlServerExpression : CommonExpression { public SqlServerExpression(CommonUtils common) : base(common) { } public override string ExpressionLambdaToSqlOther(Expression exp, ExpTSC tsc) { Func getExp = exparg => ExpressionLambdaToSql(exparg, tsc); switch (exp.NodeType) { case ExpressionType.Convert: var operandExp = (exp as UnaryExpression)?.Operand; var gentype = exp.Type.NullableTypeOrThis(); if (gentype != operandExp.Type.NullableTypeOrThis()) { switch (gentype.ToString()) { case "System.Boolean": return $"(cast({getExp(operandExp)} as varchar) not in ('0','false'))"; case "System.Byte": return $"cast({getExp(operandExp)} as tinyint)"; case "System.Char": return $"substring(cast({getExp(operandExp)} as nvarchar),1,1)"; case "System.DateTime": return $"cast({getExp(operandExp)} as datetime)"; case "System.Decimal": return $"cast({getExp(operandExp)} as decimal(36,18))"; case "System.Double": return $"cast({getExp(operandExp)} as decimal(32,16))"; case "System.Int16": return $"cast({getExp(operandExp)} as smallint)"; case "System.Int32": return $"cast({getExp(operandExp)} as int)"; case "System.Int64": return $"cast({getExp(operandExp)} as bigint)"; case "System.SByte": return $"cast({getExp(operandExp)} as tinyint)"; case "System.Single": return $"cast({getExp(operandExp)} as decimal(14,7))"; case "System.String": return operandExp.Type.NullableTypeOrThis() == typeof(Guid) ? $"cast({getExp(operandExp)} as varchar(36))" : $"cast({getExp(operandExp)} as nvarchar)"; case "System.UInt16": return $"cast({getExp(operandExp)} as smallint)"; case "System.UInt32": return $"cast({getExp(operandExp)} as int)"; case "System.UInt64": return $"cast({getExp(operandExp)} as bigint)"; case "System.Guid": return $"cast({getExp(operandExp)} as uniqueidentifier)"; } } break; case ExpressionType.Call: var callExp = exp as MethodCallExpression; switch (callExp.Method.Name) { case "Parse": case "TryParse": switch (callExp.Method.DeclaringType.NullableTypeOrThis().ToString()) { case "System.Boolean": return $"(cast({getExp(callExp.Arguments[0])} as varchar) not in ('0','false'))"; case "System.Byte": return $"cast({getExp(callExp.Arguments[0])} as tinyint)"; case "System.Char": return $"substring(cast({getExp(callExp.Arguments[0])} as nvarchar),1,1)"; case "System.DateTime": return $"cast({getExp(callExp.Arguments[0])} as datetime)"; case "System.Decimal": return $"cast({getExp(callExp.Arguments[0])} as decimal(36,18))"; case "System.Double": return $"cast({getExp(callExp.Arguments[0])} as decimal(32,16))"; case "System.Int16": return $"cast({getExp(callExp.Arguments[0])} as smallint)"; case "System.Int32": return $"cast({getExp(callExp.Arguments[0])} as int)"; case "System.Int64": return $"cast({getExp(callExp.Arguments[0])} as bigint)"; case "System.SByte": return $"cast({getExp(callExp.Arguments[0])} as tinyint)"; case "System.Single": return $"cast({getExp(callExp.Arguments[0])} as decimal(14,7))"; case "System.UInt16": return $"cast({getExp(callExp.Arguments[0])} as smallint)"; case "System.UInt32": return $"cast({getExp(callExp.Arguments[0])} as int)"; case "System.UInt64": return $"cast({getExp(callExp.Arguments[0])} as bigint)"; case "System.Guid": return $"cast({getExp(callExp.Arguments[0])} as uniqueidentifier)"; } break; case "NewGuid": switch (callExp.Method.DeclaringType.NullableTypeOrThis().ToString()) { case "System.Guid": return $"newid()"; } break; case "Next": if (callExp.Object?.Type == typeof(Random)) return "cast(rand()*1000000000 as int)"; break; case "NextDouble": if (callExp.Object?.Type == typeof(Random)) return "rand()"; break; case "Random": if (callExp.Method.DeclaringType.IsNumberType()) return "rand()"; break; case "ToString": if (callExp.Object != null) return callExp.Object.Type.NullableTypeOrThis() == typeof(Guid) ? $"cast({getExp(callExp.Object)} as varchar(36))" : $"cast({getExp(callExp.Object)} as nvarchar)"; break; } var objExp = callExp.Object; var objType = objExp?.Type; if (objType?.FullName == "System.Byte[]") return null; var argIndex = 0; if (objType == null && callExp.Method.DeclaringType == typeof(Enumerable)) { objExp = callExp.Arguments.FirstOrDefault(); objType = objExp?.Type; argIndex++; } if (objType == null) objType = callExp.Method.DeclaringType; if (objType != null || objType.IsArray || typeof(IList).IsAssignableFrom(callExp.Method.DeclaringType)) { var left = objExp == null ? null : getExp(objExp); switch (callExp.Method.Name) { case "Contains": //判断 in return $"({getExp(callExp.Arguments[argIndex])}) in {left}"; } } break; case ExpressionType.NewArrayInit: var arrExp = exp as NewArrayExpression; var arrSb = new StringBuilder(); arrSb.Append("("); for (var a = 0; a < arrExp.Expressions.Count; a++) { if (a > 0) arrSb.Append(","); arrSb.Append(getExp(arrExp.Expressions[a])); } if (arrSb.Length == 1) arrSb.Append("NULL"); return arrSb.Append(")").ToString(); case ExpressionType.ListInit: var listExp = exp as ListInitExpression; var listSb = new StringBuilder(); listSb.Append("("); for (var a = 0; a < listExp.Initializers.Count; a++) { if (listExp.Initializers[a].Arguments.Any() == false) continue; if (a > 0) listSb.Append(","); listSb.Append(getExp(listExp.Initializers[a].Arguments.FirstOrDefault())); } if (listSb.Length == 1) listSb.Append("NULL"); return listSb.Append(")").ToString(); case ExpressionType.New: var newExp = exp as NewExpression; if (typeof(IList).IsAssignableFrom(newExp.Type)) { if (newExp.Arguments.Count == 0) return "(NULL)"; if (typeof(IEnumerable).IsAssignableFrom(newExp.Arguments[0].Type) == false) return "(NULL)"; return getExp(newExp.Arguments[0]); } return null; } return null; } public override string ExpressionLambdaToSqlMemberAccessString(MemberExpression exp, ExpTSC tsc) { if (exp.Expression == null) { switch (exp.Member.Name) { case "Empty": return "''"; } return null; } var left = ExpressionLambdaToSql(exp.Expression, tsc); switch (exp.Member.Name) { case "Length": return $"len({left})"; } return null; } public override string ExpressionLambdaToSqlMemberAccessDateTime(MemberExpression exp, ExpTSC tsc) { if (exp.Expression == null) { switch (exp.Member.Name) { case "Now": return "getdate()"; case "UtcNow": return "getutcdate()"; 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, tsc); switch (exp.Member.Name) { case "Date": return $"convert(char(10),{left},120)"; case "TimeOfDay": return $"datediff(second, convert(char(10),{left},120), {left})"; case "DayOfWeek": return $"(datepart(weekday, {left})-1)"; case "Day": return $"datepart(day, {left})"; case "DayOfYear": return $"datepart(dayofyear, {left})"; case "Month": return $"datepart(month, {left})"; case "Year": return $"datepart(year, {left})"; case "Hour": return $"datepart(hour, {left})"; case "Minute": return $"datepart(minute, {left})"; case "Second": return $"datepart(second, {left})"; case "Millisecond": return $"(datepart(millisecond, {left})/1000)"; case "Ticks": return $"(cast(datediff(second, '1970-1-1', {left}) as bigint)*10000000+621355968000000000)"; } return null; } public override string ExpressionLambdaToSqlMemberAccessTimeSpan(MemberExpression exp, ExpTSC tsc) { 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, tsc); switch (exp.Member.Name) { case "Days": return $"floor(({left})/{60 * 60 * 24})"; case "Hours": return $"floor(({left})/{60 * 60}%24)"; case "Milliseconds": return $"(cast({left} as bigint)*1000)"; case "Minutes": return $"floor(({left})/60%60)"; case "Seconds": return $"(({left})%60)"; case "Ticks": return $"(cast({left} as bigint)*10000000)"; case "TotalDays": return $"(({left})/{60 * 60 * 24})"; case "TotalHours": return $"(({left})/{60 * 60})"; case "TotalMilliseconds": return $"(cast({left} as bigint)*1000)"; case "TotalMinutes": return $"(({left})/60)"; case "TotalSeconds": return $"({left})"; } return null; } public override string ExpressionLambdaToSqlCallString(MethodCallExpression exp, ExpTSC tsc) { Func getExp = exparg => ExpressionLambdaToSql(exparg, tsc); if (exp.Object == null) { switch (exp.Method.Name) { case "IsNullOrEmpty": var arg1 = getExp(exp.Arguments[0]); return $"({arg1} is null or {arg1} = '')"; case "IsNullOrWhiteSpace": var arg2 = getExp(exp.Arguments[0]); return $"({arg2} is null or {arg2} = '' or ltrim({arg2}) = '')"; case "Concat": return _common.StringConcat(exp.Arguments.Select(a => getExp(a)).ToArray(), exp.Arguments.Select(a => a.Type).ToArray()); } } else { var left = getExp(exp.Object); switch (exp.Method.Name) { case "StartsWith": case "EndsWith": case "Contains": var args0Value = getExp(exp.Arguments[0]); if (args0Value == "NULL") return $"({left}) IS NULL"; if (exp.Method.Name == "StartsWith") return $"({left}) LIKE {(args0Value.EndsWith("'") ? args0Value.Insert(args0Value.Length - 1, "%") : $"(cast({args0Value} as nvarchar)+'%')")}"; if (exp.Method.Name == "EndsWith") return $"({left}) LIKE {(args0Value.StartsWith("'") ? args0Value.Insert(1, "%") : $"('%'+cast({args0Value} as nvarchar))")}"; if (args0Value.StartsWith("'") && args0Value.EndsWith("'")) return $"({left}) LIKE {args0Value.Insert(1, "%").Insert(args0Value.Length, "%")}"; return $"({left}) LIKE ('%'+cast({args0Value} as nvarchar)+'%')"; case "ToLower": return $"lower({left})"; case "ToUpper": return $"upper({left})"; case "Substring": var substrArgs1 = getExp(exp.Arguments[0]); if (long.TryParse(substrArgs1, out var testtrylng1)) substrArgs1 = (testtrylng1 + 1).ToString(); else substrArgs1 += "+1"; if (exp.Arguments.Count == 1) return $"left({left}, {substrArgs1})"; return $"substring({left}, {substrArgs1}, {getExp(exp.Arguments[1])})"; case "IndexOf": var indexOfFindStr = getExp(exp.Arguments[0]); if (exp.Arguments.Count > 1 && exp.Arguments[1].Type.FullName == "System.Int32") { var locateArgs1 = getExp(exp.Arguments[1]); if (long.TryParse(locateArgs1, out var testtrylng2)) locateArgs1 = (testtrylng2 + 1).ToString(); else locateArgs1 += "+1"; return $"(charindex({left}, {indexOfFindStr}, {locateArgs1})-1)"; } return $"(charindex({left}, {indexOfFindStr})-1)"; case "PadLeft": if (exp.Arguments.Count == 1) return $"lpad({left}, {getExp(exp.Arguments[0])})"; return $"lpad({left}, {getExp(exp.Arguments[0])}, {getExp(exp.Arguments[1])})"; case "PadRight": if (exp.Arguments.Count == 1) return $"rpad({left}, {getExp(exp.Arguments[0])})"; return $"rpad({left}, {getExp(exp.Arguments[0])}, {getExp(exp.Arguments[1])})"; case "Trim": return $"ltrim(rtrim({left}))"; case "TrimStart": return $"ltrim({left})"; case "TrimEnd": return $"rtrim({left})"; case "Replace": return $"replace({left}, {getExp(exp.Arguments[0])}, {getExp(exp.Arguments[1])})"; case "CompareTo": return $"({left} - {getExp(exp.Arguments[0])})"; case "Equals": return $"({left} = {getExp(exp.Arguments[0])})"; } } throw new Exception($"SqlServerExpression 未实现函数表达式 {exp} 解析"); } public override string ExpressionLambdaToSqlCallMath(MethodCallExpression exp, ExpTSC tsc) { Func getExp = exparg => ExpressionLambdaToSql(exparg, tsc); switch (exp.Method.Name) { case "Abs": return $"abs({getExp(exp.Arguments[0])})"; case "Sign": return $"sign({getExp(exp.Arguments[0])})"; case "Floor": return $"floor({getExp(exp.Arguments[0])})"; case "Ceiling": return $"ceiling({getExp(exp.Arguments[0])})"; case "Round": if (exp.Arguments.Count > 1 && exp.Arguments[1].Type.FullName == "System.Int32") return $"round({getExp(exp.Arguments[0])}, {getExp(exp.Arguments[1])})"; return $"round({getExp(exp.Arguments[0])}, 0)"; case "Exp": return $"exp({getExp(exp.Arguments[0])})"; case "Log": return $"log({getExp(exp.Arguments[0])})"; case "Log10": return $"log10({getExp(exp.Arguments[0])})"; case "Pow": return $"power({getExp(exp.Arguments[0])}, {getExp(exp.Arguments[1])})"; case "Sqrt": return $"sqrt({getExp(exp.Arguments[0])})"; case "Cos": return $"cos({getExp(exp.Arguments[0])})"; case "Sin": return $"sin({getExp(exp.Arguments[0])})"; case "Tan": return $"tan({getExp(exp.Arguments[0])})"; case "Acos": return $"acos({getExp(exp.Arguments[0])})"; case "Asin": return $"asin({getExp(exp.Arguments[0])})"; case "Atan": return $"atan({getExp(exp.Arguments[0])})"; case "Atan2": return $"atan2({getExp(exp.Arguments[0])}, {getExp(exp.Arguments[1])})"; case "Truncate": return $"floor({getExp(exp.Arguments[0])})"; } throw new Exception($"SqlServerExpression 未实现函数表达式 {exp} 解析"); } public override string ExpressionLambdaToSqlCallDateTime(MethodCallExpression exp, ExpTSC tsc) { Func getExp = exparg => ExpressionLambdaToSql(exparg, tsc); if (exp.Object == null) { switch (exp.Method.Name) { case "Compare": return $"({getExp(exp.Arguments[0])} - ({getExp(exp.Arguments[1])}))"; case "DaysInMonth": return $"datepart(day, dateadd(day, -1, dateadd(month, 1, cast({getExp(exp.Arguments[0])} as varchar) + '-' + cast({getExp(exp.Arguments[1])} as varchar) + '-1')))"; case "Equals": return $"({getExp(exp.Arguments[0])} = {getExp(exp.Arguments[1])})"; case "IsLeapYear": var isLeapYearArgs1 = getExp(exp.Arguments[0]); return $"(({isLeapYearArgs1})%4=0 AND ({isLeapYearArgs1})%100<>0 OR ({isLeapYearArgs1})%400=0)"; case "Parse": return $"cast({getExp(exp.Arguments[0])} as datetime)"; case "ParseExact": case "TryParse": case "TryParseExact": return $"cast({getExp(exp.Arguments[0])} as datetime)"; } } else { var left = getExp(exp.Object); var args1 = exp.Arguments.Count == 0 ? null : getExp(exp.Arguments[0]); switch (exp.Method.Name) { case "Add": return $"dateadd(second, {args1}, {left})"; case "AddDays": return $"dateadd(day, {args1}, {left})"; case "AddHours": return $"dateadd(hour, {args1}, {left})"; case "AddMilliseconds": return $"dateadd(second, ({args1})/1000, {left})"; case "AddMinutes": return $"dateadd(minute, {args1}, {left})"; case "AddMonths": return $"dateadd(month, {args1}, {left})"; case "AddSeconds": return $"dateadd(second, {args1}, {left})"; case "AddTicks": return $"dateadd(second, ({args1})/10000000, {left})"; case "AddYears": return $"dateadd(year, {args1}, {left})"; case "Subtract": switch ((exp.Arguments[0].Type.IsNullableType() ? exp.Arguments[0].Type.GenericTypeArguments.FirstOrDefault() : exp.Arguments[0].Type).FullName) { case "System.DateTime": return $"datediff(second, {args1}, {left})"; case "System.TimeSpan": return $"dateadd(second, {args1}*-1, {left})"; } break; case "Equals": return $"({left} = {getExp(exp.Arguments[0])})"; case "CompareTo": return $"datediff(second,{getExp(exp.Arguments[0])},{left})"; case "ToString": return $"convert(varchar, {left}, 121)"; } } throw new Exception($"SqlServerExpression 未实现函数表达式 {exp} 解析"); } public override string ExpressionLambdaToSqlCallTimeSpan(MethodCallExpression exp, ExpTSC tsc) { Func getExp = exparg => ExpressionLambdaToSql(exparg, tsc); if (exp.Object == null) { switch (exp.Method.Name) { case "Compare": return $"({getExp(exp.Arguments[0])}-({getExp(exp.Arguments[1])}))"; case "Equals": return $"({getExp(exp.Arguments[0])} = {getExp(exp.Arguments[1])})"; case "FromDays": return $"(({getExp(exp.Arguments[0])})*{60 * 60 * 24})"; case "FromHours": return $"(({getExp(exp.Arguments[0])})*{60 * 60})"; case "FromMilliseconds": return $"(({getExp(exp.Arguments[0])})/1000)"; case "FromMinutes": return $"(({getExp(exp.Arguments[0])})*60)"; case "FromSeconds": return $"({getExp(exp.Arguments[0])})"; case "FromTicks": return $"(({getExp(exp.Arguments[0])})/10000000)"; case "Parse": return $"cast({getExp(exp.Arguments[0])} as bigint)"; case "ParseExact": case "TryParse": case "TryParseExact": return $"cast({getExp(exp.Arguments[0])} as bigint)"; } } else { var left = getExp(exp.Object); var args1 = exp.Arguments.Count == 0 ? null : getExp(exp.Arguments[0]); switch (exp.Method.Name) { case "Add": return $"({left}+{args1})"; case "Subtract": return $"({left}-({args1}))"; case "Equals": return $"({left} = {getExp(exp.Arguments[0])})"; case "CompareTo": return $"({left}-({getExp(exp.Arguments[0])}))"; case "ToString": return $"cast({left} as varchar)"; } } throw new Exception($"SqlServerExpression 未实现函数表达式 {exp} 解析"); } public override string ExpressionLambdaToSqlCallConvert(MethodCallExpression exp, ExpTSC tsc) { Func getExp = exparg => ExpressionLambdaToSql(exparg, tsc); if (exp.Object == null) { switch (exp.Method.Name) { case "ToBoolean": return $"(cast({getExp(exp.Arguments[0])} as varchar) not in ('0','false'))"; case "ToByte": return $"cast({getExp(exp.Arguments[0])} as tinyint)"; case "ToChar": return $"substring(cast({getExp(exp.Arguments[0])} as nvarchar),1,1)"; case "ToDateTime": return $"cast({getExp(exp.Arguments[0])} as datetime)"; case "ToDecimal": return $"cast({getExp(exp.Arguments[0])} as decimal(36,18))"; case "ToDouble": return $"cast({getExp(exp.Arguments[0])} as decimal(32,16))"; case "ToInt16": return $"cast({getExp(exp.Arguments[0])} as smallint)"; case "ToInt32": return $"cast({getExp(exp.Arguments[0])} as int)"; case "ToInt64": return $"cast({getExp(exp.Arguments[0])} as bigint)"; case "ToSByte": return $"cast({getExp(exp.Arguments[0])} as tinyint)"; case "ToSingle": return $"cast({getExp(exp.Arguments[0])} as decimal(14,7))"; case "ToString": return exp.Arguments[0].Type.NullableTypeOrThis() == typeof(Guid) ? $"cast({getExp(exp.Arguments[0])} as varchar(36))" : $"cast({getExp(exp.Arguments[0])} as nvarchar)"; case "ToUInt16": return $"cast({getExp(exp.Arguments[0])} as smallint)"; case "ToUInt32": return $"cast({getExp(exp.Arguments[0])} as int)"; case "ToUInt64": return $"cast({getExp(exp.Arguments[0])} as bigint)"; } } throw new Exception($"SqlServerExpression 未实现函数表达式 {exp} 解析"); } } }