using FreeSql.Internal;
using Newtonsoft.Json.Linq;
using System;
using System.Collections;
using System.Collections.Generic;
using System.Linq;
using System.Linq.Expressions;
using System.Text;
using System.Text.RegularExpressions;
namespace FreeSql.Xugu
{
class XuguExpression : CommonExpression
{
public XuguExpression(CommonUtils common) : base(common) { }
public override string ExpressionLambdaToSqlOther(Expression exp, ExpTSC tsc)
{
Func<Expression, string> getExp = exparg => ExpressionLambdaToSql(exparg, tsc);
switch (exp.NodeType)
{
case ExpressionType.ArrayLength:
var arrOper = (exp as UnaryExpression)?.Operand;
var arrOperExp = getExp(arrOper);
if (arrOperExp.StartsWith("(") || arrOperExp.EndsWith(")")) return $"array_length(array[{arrOperExp.TrimStart('(').TrimEnd(')')}],1)";
if (arrOper.Type == typeof(byte[])) return $"octet_length({getExp(arrOper)})";
return $"case when {arrOperExp} is null then 0 else array_length({arrOperExp},1) end";
case ExpressionType.Convert:
var operandExp = (exp as UnaryExpression)?.Operand;
var gentype = exp.Type.NullableTypeOrThis();
if (gentype != operandExp.Type.NullableTypeOrThis())
{
switch (exp.Type.NullableTypeOrThis().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 varchar),1,1)";
case "System.DateTime": return ExpressionConstDateTime(operandExp) ?? $"cast({getExp(operandExp)} as datetime)";
case "System.Decimal": return $"cast({getExp(operandExp)} as numeric(36,18))";
case "System.Double": return $"cast({getExp(operandExp)} as numeric(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 numeric(14,7))";
case "System.String":
return gentype == typeof(Guid) ?
$"cast({getExp(operandExp)} as char(36))" :
$"cast({getExp(operandExp)} as {(gentype.IsNumberType() || gentype.IsEnum ? "varchar(100)" : "text")})";
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 numeric(20,0))";
case "System.Guid": return $"cast({getExp(operandExp)} as char(36))";
}
}
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 varchar),1,1)";
case "System.DateTime": return ExpressionConstDateTime(callExp.Arguments[0]) ?? $"cast({getExp(callExp.Arguments[0])} as datetime)";
case "System.Decimal": return $"cast({getExp(callExp.Arguments[0])} as numeric(36,18))";
case "System.Double": return $"cast({getExp(callExp.Arguments[0])} as numeric(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 numeric(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 numeric(20,0))";
case "System.Guid": return $"cast({getExp(callExp.Arguments[0])} as char(36))";
}
break;
case "NewGuid":
return null;
case "Next":
if (callExp.Object?.Type == typeof(Random)) return "cast(random()*1000000000 as int)";
return null;
case "NextDouble":
if (callExp.Object?.Type == typeof(Random)) return "random()";
return null;
case "Random":
if (callExp.Method.DeclaringType.IsNumberType()) return "random()";
return null;
case "ToString":
if (callExp.Object != null)
{
if (callExp.Object.Type.NullableTypeOrThis().IsEnum)
{
tsc.SetMapColumnTmp(null);
var oldMapType = tsc.SetMapTypeReturnOld(typeof(string));
var enumStr = ExpressionLambdaToSql(callExp.Object, tsc);
tsc.SetMapColumnTmp(null).SetMapTypeReturnOld(oldMapType);
return enumStr;
}
var value = ExpressionGetValue(callExp.Object, out var success);
if (success) return formatSql(value, typeof(string), null, null);
return callExp.Arguments.Count == 0 ? $"cast({getExp(callExp.Object)} as text)" : null;
}
return null;
}
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 == typeof(string))
{
switch (callExp.Method.Name)
{
case "First":
case "FirstOrDefault":
return $"substr({getExp(callExp.Arguments[0])}, 1, 1)";
}
}
}
if (objType == null) objType = callExp.Method.DeclaringType;
if (objType != null || objType.IsArrayOrList())
{
if (argIndex >= callExp.Arguments.Count) break;
tsc.SetMapColumnTmp(null);
var args1 = getExp(callExp.Arguments[argIndex]);
var oldMapType = tsc.SetMapTypeReturnOld(tsc.mapTypeTmp);
var oldDbParams = objExp?.NodeType == ExpressionType.MemberAccess ? tsc.SetDbParamsReturnOld(null) : null; //#900 UseGenerateCommandParameterWithLambda(true) 子查询 bug、以及 #1173 参数化 bug
tsc.isNotSetMapColumnTmp = true;
var left = objExp == null ? null : getExp(objExp);
tsc.isNotSetMapColumnTmp = false;
tsc.SetMapColumnTmp(null).SetMapTypeReturnOld(oldMapType);
if (oldDbParams != null) tsc.SetDbParamsReturnOld(oldDbParams);
switch (callExp.Method.Name)
{
case "Contains":
//判断 in //在各大 Provider AdoProvider 中已约定，500元素分割, 3空格\r\n4空格
return $"(({args1}) in {left.Replace(", \r\n \r\n", $") \r\n OR ({args1}) in (")})";
}
}
break;
case ExpressionType.MemberAccess:
var memExp = exp as MemberExpression;
var memParentExp = memExp.Expression?.Type;
if (memParentExp?.FullName == "System.Byte[]") return null;
if (memParentExp != null)
{
if (memParentExp.IsArray == true)
{
var left = getExp(memExp.Expression);
if (left.StartsWith("(") || left.EndsWith(")")) left = $"array[{left.TrimStart('(').TrimEnd(')')}]";
switch (memExp.Member.Name)
{
case "Length":
case "Count": return $"case when {left} is null then 0 else array_length({left},1) end";
}
}
switch (memParentExp.FullName)
{
case "Newtonsoft.Json.Linq.JToken":
case "Newtonsoft.Json.Linq.JObject":
case "Newtonsoft.Json.Linq.JArray":
var left = getExp(memExp.Expression);
switch (memExp.Member.Name)
{
case "Count": return $"jsonb_array_length(coalesce({left},'[]'))";
}
break;
}
if (memParentExp == typeof(Dictionary<string, string>))
{
var left = getExp(memExp.Expression);
switch (memExp.Member.Name)
{
case "Count": return $"case when {left} is null then 0 else array_length(akeys({left}),1) end";
case "Keys": return $"akeys({left})";
case "Values": return $"avals({left})";
}
}
}
break;
case ExpressionType.NewArrayInit:
var arrExp = exp as NewArrayExpression;
var arrSb = new StringBuilder();
arrSb.Append("array[");
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 $"char_length({left})";
}
return null;
}
public override string ExpressionLambdaToSqlMemberAccessDateTime(MemberExpression exp, ExpTSC tsc)
{
if (exp.Expression == null)
{
switch (exp.Member.Name)
{
case "Now": return _common.Now;
case "UtcNow": return _common.NowUtc;
case "Today": return $"cast(date_format({_common.Now},'%Y-%m-%d') as datetime)";
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 $"cast(date_format({left},'%Y-%m-%d') as datetime)";
case "TimeOfDay": return $"datediff(second, date_format({left},'%Y-%m-%d'), {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<Expression, string> 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(), null);
case "Format":
if (exp.Arguments[0].NodeType != ExpressionType.Constant) throw new Exception(CoreStrings.Not_Implemented_Expression_ParameterUseConstant(exp,exp.Arguments[0]));
var expArgsHack = exp.Arguments.Count == 2 && exp.Arguments[1].NodeType == ExpressionType.NewArrayInit ?
(exp.Arguments[1] as NewArrayExpression).Expressions : exp.Arguments.Where((a, z) => z > 0);
//3个 {} 时，Arguments 解析出来是分开的
//4个 {} 时，Arguments[1] 只能解析这个出来，然后里面是 NewArray []
var expArgs = expArgsHack.Select(a =>
{
var atype = (a as UnaryExpression)?.Operand.Type.NullableTypeOrThis() ?? a.Type.NullableTypeOrThis();
if (atype == typeof(string)) return $"'||{_common.IsNull(ExpressionLambdaToSql(a, tsc), "''")}||'";
return $"'||{_common.IsNull($"cast({ExpressionLambdaToSql(a, tsc)} text)", "''")}||'";
}).ToArray();
return string.Format(ExpressionLambdaToSql(exp.Arguments[0], tsc), expArgs);
case "Join":
if (exp.IsStringJoin(out var tolistObjectExp, out var toListMethod, out var toListArgs1))
{
var newToListArgs0 = Expression.Call(tolistObjectExp, toListMethod,
Expression.Lambda(
Expression.Call(
typeof(SqlExtExtensions).GetMethod("StringJoinPgsqlGroupConcat"),
Expression.Convert(toListArgs1.Body, typeof(object)),
Expression.Convert(exp.Arguments[0], typeof(object))),
toListArgs1.Parameters));
var newToListSql = getExp(newToListArgs0);
return newToListSql;
}
break;
}
}
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 (args0Value.Contains("%"))
{
if (exp.Method.Name == "StartsWith") return $"strpos({args0Value}, {left}) = 1";
if (exp.Method.Name == "EndsWith") return $"strpos({args0Value}, {left}) = char_length({args0Value})";
return $"strpos({args0Value}, {left}) > 0";
}
var likeOpt = "LIKE";
if (exp.Arguments.Count > 1)
{
if (exp.Arguments[1].Type == typeof(bool) ||
exp.Arguments[1].Type == typeof(StringComparison)) likeOpt = "ILIKE";
}
if (exp.Method.Name == "StartsWith") return $"({left}) {likeOpt} {(args0Value.EndsWith("'") ? args0Value.Insert(args0Value.Length - 1, "%") : $"(cast({args0Value} as text) || '%')")}";
if (exp.Method.Name == "EndsWith") return $"({left}) {likeOpt} {(args0Value.StartsWith("'") ? args0Value.Insert(1, "%") : $"('%' || cast({args0Value} as text))")}";
if (args0Value.StartsWith("'") && args0Value.EndsWith("'")) return $"({left}) {likeOpt} {args0Value.Insert(1, "%").Insert(args0Value.Length, "%")}";
return $"({left}) {likeOpt} ('%' || cast({args0Value} as text) || '%')";
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 $"substr({left}, {substrArgs1})";
return $"substr({left}, {substrArgs1}, {getExp(exp.Arguments[1])})";
case "IndexOf": return $"(strpos({left}, {getExp(exp.Arguments[0])})-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":
case "TrimStart":
case "TrimEnd":
if (exp.Arguments.Count == 0)
{
if (exp.Method.Name == "Trim") return $"trim({left})";
if (exp.Method.Name == "TrimStart") return $"ltrim({left})";
if (exp.Method.Name == "TrimEnd") return $"rtrim({left})";
}
var trimArg1 = "";
var trimArg2 = "";
foreach (var argsTrim02 in exp.Arguments)
{
var argsTrim01s = new[] { argsTrim02 };
if (argsTrim02.NodeType == ExpressionType.NewArrayInit)
{
var arritem = argsTrim02 as NewArrayExpression;
argsTrim01s = arritem.Expressions.ToArray();
}
foreach (var argsTrim01 in argsTrim01s)
{
var trimChr = getExp(argsTrim01).Trim('\'');
if (trimChr.Length == 1) trimArg1 += trimChr;
else trimArg2 += $" || ({trimChr})";
}
}
if (exp.Method.Name == "Trim") left = $"trim({left}, {_common.FormatSql("{0}", trimArg1)}{trimArg2})";
if (exp.Method.Name == "TrimStart") left = $"ltrim({left}, {_common.FormatSql("{0}", trimArg1)}{trimArg2})";
if (exp.Method.Name == "TrimEnd") left = $"rtrim({left}, {_common.FormatSql("{0}", trimArg1)}{trimArg2})";
return left;
case "Replace": return $"replace({left}, {getExp(exp.Arguments[0])}, {getExp(exp.Arguments[1])})";
case "CompareTo": return $"case when {left} = {getExp(exp.Arguments[0])} then 0 when {left} > {getExp(exp.Arguments[0])} then 1 else -1 end";
case "Equals": return $"({left} = cast({getExp(exp.Arguments[0])} text))";
}
}
return null;
}
public override string ExpressionLambdaToSqlCallMath(MethodCallExpression exp, ExpTSC tsc)
{
Func<Expression, string> 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])})";
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 $"pow({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 $"trunc({getExp(exp.Arguments[0])}, 0)";
}
return null;
}
public override string ExpressionLambdaToSqlCallDateTime(MethodCallExpression exp, ExpTSC tsc)
{
Func<Expression, string> 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(100)) + '-' + cast({getExp(exp.Arguments[1])} as varchar(100)) + '-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 ExpressionConstDateTime(exp.Arguments[0]) ?? $"cast({getExp(exp.Arguments[0])} as datetime)";
case "ParseExact":
case "TryParse":
case "TryParseExact": return ExpressionConstDateTime(exp.Arguments[0]) ?? $"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 $"date_add({left}, interval '{args1}' microsecond)";
case "AddDays": return $"date_add({left}, interval '{args1}' day)";
case "AddHours": return $"date_add({left}, interval '{args1}' hour)";
case "AddMilliseconds": return $"date_add({left}, interval '{args1}'*1000 microsecond)";
case "AddMinutes": return $"date_add({left}, interval '{args1}' minute)";
case "AddMonths": return $"date_add({left}, interval '{args1}' month)";
case "AddSeconds": return $"date_add({left}, interval '{args1}' second)";
case "AddTicks": return $"date_add({left}, interval '{args1}'/10 microsecond)";
case "AddYears": return $"date_add({left}, interval '{args1}' year)";
case "Subtract":
switch ((exp.Arguments[0].Type.IsNullableType() ? exp.Arguments[0].Type.GetGenericArguments().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} = {args1})";
case "CompareTo": return $"datediff(second,{args1},{left})";
case "ToString":
if (exp.Arguments.Count == 0) return $"date_format({left},'%Y-%m-%d %H:%i:%s.%f')";
switch (args1)
{
case "'yyyy-MM-dd HH:mm:ss'": return $"date_format({left},'%Y-%m-%d %H:%i:%s')";
case "'yyyy-MM-dd HH:mm'": return $"date_format({left},'%Y-%m-%d %H:%i')";
case "'yyyy-MM-dd HH'": return $"date_format({left},'%Y-%m-%d %H')";
case "'yyyy-MM-dd'": return $"date_format({left},'%Y-%m-%d')";
case "'yyyy-MM'": return $"date_format({left},'%Y-%m')";
case "'yyyyMMddHHmmss'": return $"date_format({left},'%Y%m%d%H%i%s')";
case "'yyyyMMddHHmm'": return $"date_format({left},'%Y%m%d%H%i')";
case "'yyyyMMddHH'": return $"date_format({left},'%Y%m%d%H')";
case "'yyyyMMdd'": return $"date_format({left},'%Y%m%d')";
case "'yyyyMM'": return $"date_format({left},'%Y%m')";
case "'yyyy'": return $"date_format({left},'%Y')";
case "'HH:mm:ss'": return $"date_format({left},'%H:%i:%s')";
}
args1 = Regex.Replace(args1, "(yyyy|yy|MM|M|dd|d|HH|H|hh|h|mm|ss|tt)", m =>
{
switch (m.Groups[1].Value)
{
case "yyyy": return $"%Y";
case "yy": return $"%y";
case "MM": return $"%_a1";
case "M": return $"%c";
case "dd": return $"%d";
case "d": return $"%e";
case "HH": return $"%H";
case "H": return $"%k";
case "hh": return $"%h";
case "h": return $"%l";
case "mm": return $"%i";
case "ss": return $"%_a2";
case "tt": return $"%p";
}
return m.Groups[0].Value;
});
var argsFinds = new[] { "%Y", "%y", "%_a1", "%c", "%d", "%e", "%H", "%k", "%h", "%l", "%i", "%_a2", "%p" };
var argsSpts = Regex.Split(args1, "(m|s|t)");
for (var a = 0; a < argsSpts.Length; a++)
{
switch (argsSpts[a])
{
case "m": argsSpts[a] = $"case when substr(date_format({left},'%i'),1,1) = '0' then substr(date_format({left},'%i'),2,1) else date_format({left},'%i') end"; break;
case "s": argsSpts[a] = $"case when substr(date_format({left},'%s'),1,1) = '0' then substr(date_format({left},'%s'),2,1) else date_format({left},'%s') end"; break;
case "t": argsSpts[a] = $"trim(trailing 'M' from date_format({left},'%p'))"; break;
default:
var argsSptsA = argsSpts[a];
if (argsSptsA.StartsWith("'")) argsSptsA = argsSptsA.Substring(1);
if (argsSptsA.EndsWith("'")) argsSptsA = argsSptsA.Remove(argsSptsA.Length - 1);
argsSpts[a] = argsFinds.Any(m => argsSptsA.Contains(m)) ? $"date_format({left},'{argsSptsA}')" : $"'{argsSptsA}'";
break;
}
}
if (argsSpts.Length > 0) args1 = $"concat({string.Join(", ", argsSpts.Where(a => a != "''"))})";
return args1.Replace("%_a1", "%m").Replace("%_a2", "%s");
}
}
return null;
}
public override string ExpressionLambdaToSqlCallTimeSpan(MethodCallExpression exp, ExpTSC tsc)
{
Func<Expression, string> 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} = {args1})";
case "CompareTo": return $"({left}-({args1}))";
case "ToString": return $"cast({left} as varchar(100))";
}
}
return null;
}
public override string ExpressionLambdaToSqlCallConvert(MethodCallExpression exp, ExpTSC tsc)
{
Func<Expression, string> 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 varchar),1,1)";
case "ToDateTime": return ExpressionConstDateTime(exp.Arguments[0]) ?? $"cast({getExp(exp.Arguments[0])} as datetime)";
case "ToDecimal": return $"cast({getExp(exp.Arguments[0])} as numeric(36,18))";
case "ToDouble": return $"cast({getExp(exp.Arguments[0])} as numeric(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 numeric(14,7))";
case "ToString":
var gentype = exp.Arguments[0].Type.NullableTypeOrThis();
return gentype == typeof(Guid) ?
$"cast({getExp(exp.Arguments[0])} as char(36))" :
$"cast({getExp(exp.Arguments[0])} as {(gentype.IsNumberType() || gentype.IsEnum ? "varchar(100)" : "text")})";
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 numeric(20,0))";
}
}
return null;
}
}
}