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FreeSql/FreeSql/SqlServer/SqlServerExpression.cs
28810 96a944c534 in/not in
2018-12-29 11:53:39 +08:00

292 lines
23 KiB
C#
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using FreeSql.Internal;
using FreeSql.Internal.Model;
using System;
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) { }
internal override string ExpressionLambdaToSqlOther(Expression exp, List<SelectTableInfo> _tables, List<SelectColumnInfo> _selectColumnMap, Func<Expression[], string> getSelectGroupingMapString, SelectTableInfoType tbtype, bool isQuoteName) {
switch (exp.NodeType) {
case ExpressionType.Call:
var callExp = exp as MethodCallExpression;
var objExp = callExp.Object;
var objType = objExp?.Type;
if (objType?.FullName == "System.Byte[]") return null;
var argIndex = 0;
if (objType == null && callExp.Method.DeclaringType.FullName == typeof(Enumerable).FullName) {
objExp = callExp.Arguments.FirstOrDefault();
objType = objExp?.Type;
argIndex++;
}
if (objType == null) objType = callExp.Method.DeclaringType;
if (objType != null) {
var left = objExp == null ? null : ExpressionLambdaToSql(objExp, _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName);
if (objType.IsArray == true) {
switch (callExp.Method.Name) {
case "Contains":
//判断 in
return $"({ExpressionLambdaToSql(callExp.Arguments[argIndex], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)}) 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(ExpressionLambdaToSql(arrExp.Expressions[a], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName));
}
return arrSb.Append(")").ToString();
}
return null;
}
internal override string ExpressionLambdaToSqlMemberAccessString(MemberExpression exp, List<SelectTableInfo> _tables, List<SelectColumnInfo> _selectColumnMap, Func<Expression[], string> getSelectGroupingMapString, SelectTableInfoType tbtype, bool isQuoteName) {
if (exp.Expression == null) {
switch (exp.Member.Name) {
case "Empty": return "''";
}
return null;
}
var left = ExpressionLambdaToSql(exp.Expression, _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName);
switch (exp.Member.Name) {
case "Length": return $"len({left})";
}
return null;
}
internal override string ExpressionLambdaToSqlMemberAccessDateTime(MemberExpression exp, List<SelectTableInfo> _tables, List<SelectColumnInfo> _selectColumnMap, Func<Expression[], string> getSelectGroupingMapString, SelectTableInfoType tbtype, bool isQuoteName) {
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, _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName);
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;
}
internal override string ExpressionLambdaToSqlMemberAccessTimeSpan(MemberExpression exp, List<SelectTableInfo> _tables, List<SelectColumnInfo> _selectColumnMap, Func<Expression[], string> getSelectGroupingMapString, 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, getSelectGroupingMapString, tbtype, isQuoteName);
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;
}
internal override string ExpressionLambdaToSqlCallString(MethodCallExpression exp, List<SelectTableInfo> _tables, List<SelectColumnInfo> _selectColumnMap, Func<Expression[], string> getSelectGroupingMapString, SelectTableInfoType tbtype, bool isQuoteName) {
if (exp.Object == null) {
switch (exp.Method.Name) {
case "IsNullOrEmpty":
var arg1 = ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName);
return $"({arg1} is null or {arg1} = '')";
}
} else {
var left = ExpressionLambdaToSql(exp.Object, _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName);
switch (exp.Method.Name) {
case "StartsWith":
case "EndsWith":
case "Contains":
var args0Value = ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName);
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 = ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName);
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}, {ExpressionLambdaToSql(exp.Arguments[1], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)})";
case "IndexOf":
var indexOfFindStr = ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName);
if (exp.Arguments.Count > 1 && exp.Arguments[1].Type.FullName == "System.Int32") {
var locateArgs1 = ExpressionLambdaToSql(exp.Arguments[1], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName);
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}, {ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)})";
return $"lpad({left}, {ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)}, {ExpressionLambdaToSql(exp.Arguments[1], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)})";
case "PadRight":
if (exp.Arguments.Count == 1) return $"rpad({left}, {ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)})";
return $"rpad({left}, {ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)}, {ExpressionLambdaToSql(exp.Arguments[1], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)})";
case "Trim": return $"ltrim(rtrim({left}))";
case "TrimStart": return $"ltrim({left})";
case "TrimEnd": return $"rtrim({left})";
case "Replace": return $"replace({left}, {ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)}, {ExpressionLambdaToSql(exp.Arguments[1], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)})";
case "CompareTo": return $"({left} - {ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)})";
case "Equals": return $"({left} = {ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)})";
}
}
throw new Exception($"SqlServerExpression 未现实函数表达式 {exp} 解析");
}
internal override string ExpressionLambdaToSqlCallMath(MethodCallExpression exp, List<SelectTableInfo> _tables, List<SelectColumnInfo> _selectColumnMap, Func<Expression[], string> getSelectGroupingMapString, SelectTableInfoType tbtype, bool isQuoteName) {
switch (exp.Method.Name) {
case "Abs": return $"abs({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)})";
case "Sign": return $"sign({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)})";
case "Floor": return $"floor({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)})";
case "Ceiling": return $"ceiling({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)})";
case "Round":
if (exp.Arguments.Count > 1 && exp.Arguments[1].Type.FullName == "System.Int32") return $"round({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)}, {ExpressionLambdaToSql(exp.Arguments[1], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)})";
return $"round({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)}, 0)";
case "Exp": return $"exp({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)})";
case "Log": return $"log({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)})";
case "Log10": return $"log10({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)})";
case "Pow": return $"power({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)}, {ExpressionLambdaToSql(exp.Arguments[1], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)})";
case "Sqrt": return $"sqrt({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)})";
case "Cos": return $"cos({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)})";
case "Sin": return $"sin({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)})";
case "Tan": return $"tan({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)})";
case "Acos": return $"acos({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)})";
case "Asin": return $"asin({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)})";
case "Atan": return $"atan({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)})";
case "Atan2": return $"atan2({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)}, {ExpressionLambdaToSql(exp.Arguments[1], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)})";
case "Truncate": return $"floor({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)})";
}
throw new Exception($"SqlServerExpression 未现实函数表达式 {exp} 解析");
}
internal override string ExpressionLambdaToSqlCallDateTime(MethodCallExpression exp, List<SelectTableInfo> _tables, List<SelectColumnInfo> _selectColumnMap, Func<Expression[], string> getSelectGroupingMapString, SelectTableInfoType tbtype, bool isQuoteName) {
if (exp.Object == null) {
switch (exp.Method.Name) {
case "Compare": return $"({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)} - ({ExpressionLambdaToSql(exp.Arguments[1], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)}))";
case "DaysInMonth": return $"datepart(day, dateadd(day, -1, dateadd(month, 1, cast({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)} as varchar) + '-' + cast({ExpressionLambdaToSql(exp.Arguments[1], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)} as varchar) + '-1')))";
case "Equals": return $"({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)} = {ExpressionLambdaToSql(exp.Arguments[1], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)})";
case "IsLeapYear":
var isLeapYearArgs1 = ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName);
return $"(({isLeapYearArgs1})%4=0 AND ({isLeapYearArgs1})%100<>0 OR ({isLeapYearArgs1})%400=0)";
case "Parse": return $"cast({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)} as datetime)";
case "ParseExact":
case "TryParse":
case "TryParseExact": return $"cast({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)} as datetime)";
}
} else {
var left = ExpressionLambdaToSql(exp.Object, _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName);
var args1 = exp.Arguments.Count == 0 ? null : ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName);
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":
if (exp.Arguments[0].Type.FullName == "System.DateTime" || exp.Arguments[0].Type.GenericTypeArguments.FirstOrDefault()?.FullName == "System.DateTime")
return $"datediff(second, {args1}, {left})";
if (exp.Arguments[0].Type.FullName == "System.TimeSpan" || exp.Arguments[0].Type.GenericTypeArguments.FirstOrDefault()?.FullName == "System.TimeSpan")
return $"dateadd(second, {args1}*-1, {left})";
break;
case "Equals": return $"({left} = {ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)})";
case "CompareTo": return $"(({left}) - ({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, 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, Func<Expression[], string> getSelectGroupingMapString, SelectTableInfoType tbtype, bool isQuoteName) {
if (exp.Object == null) {
switch (exp.Method.Name) {
case "Compare": return $"({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)}-({ExpressionLambdaToSql(exp.Arguments[1], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)}))";
case "Equals": return $"({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)} = {ExpressionLambdaToSql(exp.Arguments[1], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)})";
case "FromDays": return $"(({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)})*{60 * 60 * 24})";
case "FromHours": return $"(({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)})*{60 * 60})";
case "FromMilliseconds": return $"(({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)})/1000)";
case "FromMinutes": return $"(({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)})*60)";
case "FromSeconds": return $"({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)})";
case "FromTicks": return $"(({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)})/10000000)";
case "Parse": return $"cast({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)} as bigint)";
case "ParseExact":
case "TryParse":
case "TryParseExact": return $"cast({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)} as bigint)";
}
} else {
var left = ExpressionLambdaToSql(exp.Object, _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName);
var args1 = exp.Arguments.Count == 0 ? null : ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName);
switch (exp.Method.Name) {
case "Add": return $"({left}+{args1})";
case "Subtract": return $"({left}-({args1}))";
case "Equals": return $"({left} = {ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)})";
case "CompareTo": return $"({left}-({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)}))";
case "ToString": return $"cast({left} as varchar)";
}
}
throw new Exception($"SqlServerExpression 未现实函数表达式 {exp} 解析");
}
internal override string ExpressionLambdaToSqlCallConvert(MethodCallExpression exp, List<SelectTableInfo> _tables, List<SelectColumnInfo> _selectColumnMap, Func<Expression[], string> getSelectGroupingMapString, SelectTableInfoType tbtype, bool isQuoteName) {
if (exp.Object == null) {
switch (exp.Method.Name) {
case "ToBoolean": return $"({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)} not in ('0','false'))";
case "ToByte": return $"cast({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)} as tinyint)";
case "ToChar": return $"substring(cast({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)} as nvarchar), 1, 1)";
case "ToDateTime": return $"cast({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)} as datetime)";
case "ToDecimal": return $"cast({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)} as decimal(36,18))";
case "ToDouble": return $"cast({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)} as decimal(32,16))";
case "ToInt16": return $"cast({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)} as smallint)";
case "ToInt32": return $"cast({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)} as int)";
case "ToInt64": return $"cast({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)} as bigint)";
case "ToSByte": return $"cast({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)} as tinyint)";
case "ToSingle": return $"cast({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)} as decimal(14,7))";
case "ToString": return $"cast({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)} as nvarchar)";
case "ToUInt16": return $"cast({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)} as smallint)";
case "ToUInt32": return $"cast({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)} as int)";
case "ToUInt64": return $"cast({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)} as bigint)";
}
}
throw new Exception($"SqlServerExpression 未现实函数表达式 {exp} 解析");
}
}
}
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