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266 lines
22 KiB
C#
266 lines
22 KiB
C#
using FreeSql.Internal;
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using FreeSql.Internal.Model;
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using System;
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using System.Collections.Generic;
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using System.Linq;
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using System.Linq.Expressions;
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namespace FreeSql.MySql {
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class MySqlExpression : CommonExpression {
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public MySqlExpression(CommonUtils common) : base(common) { }
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internal override string ExpressionLambdaToSqlOther(Expression exp, List<SelectTableInfo> _tables, List<SelectColumnInfo> _selectColumnMap, Func<Expression[], string> getSelectGroupingMapString, SelectTableInfoType tbtype, bool isQuoteName) {
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return null;
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}
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internal override string ExpressionLambdaToSqlMemberAccessString(MemberExpression exp, List<SelectTableInfo> _tables, List<SelectColumnInfo> _selectColumnMap, Func<Expression[], string> getSelectGroupingMapString, SelectTableInfoType tbtype, bool isQuoteName) {
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if (exp.Expression == null) {
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switch (exp.Member.Name) {
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case "Empty": return "''";
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}
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return null;
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}
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var left = ExpressionLambdaToSql(exp.Expression, _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName);
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switch (exp.Member.Name) {
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case "Length": return $"char_length({left})";
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}
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return null;
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}
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internal override string ExpressionLambdaToSqlMemberAccessDateTime(MemberExpression exp, List<SelectTableInfo> _tables, List<SelectColumnInfo> _selectColumnMap, Func<Expression[], string> getSelectGroupingMapString, SelectTableInfoType tbtype, bool isQuoteName) {
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if (exp.Expression == null) {
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switch (exp.Member.Name) {
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case "Now": return "now()";
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case "UtcNow": return "utc_timestamp()";
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case "Today": return "curdate()";
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case "MinValue": return "cast('0001/1/1 0:00:00' as datetime)";
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case "MaxValue": return "cast('9999/12/31 23:59:59' as datetime)";
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}
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return null;
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}
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var left = ExpressionLambdaToSql(exp.Expression, _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName);
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switch (exp.Member.Name) {
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case "Date": return $"cast(date_format({left},'%Y-%m-%d') as datetime)";
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case "TimeOfDay": return $"timestampdiff(microsecond, date_format({left},'%Y-%m-%d'), {left})";
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case "DayOfWeek": return $"(dayofweek({left})-1)";
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case "Day": return $"dayofmonth({left})";
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case "DayOfYear": return $"dayofyear({left})";
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case "Month": return $"month({left})";
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case "Year": return $"year({left})";
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case "Hour": return $"hour({left})";
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case "Minute": return $"minute({left})";
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case "Second": return $"second({left})";
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case "Millisecond": return $"floor(microsecond({left})/1000)";
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case "Ticks": return $"(timestampdiff(microsecond, '0001-1-1', {left})*10)";
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}
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return null;
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}
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internal override string ExpressionLambdaToSqlMemberAccessTimeSpan(MemberExpression exp, List<SelectTableInfo> _tables, List<SelectColumnInfo> _selectColumnMap, Func<Expression[], string> getSelectGroupingMapString, SelectTableInfoType tbtype, bool isQuoteName) {
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if (exp.Expression == null) {
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switch (exp.Member.Name) {
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case "Zero": return "0";
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case "MinValue": return "-922337203685477580"; //微秒 Ticks / 10
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case "MaxValue": return "922337203685477580";
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}
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return null;
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}
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var left = ExpressionLambdaToSql(exp.Expression, _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName);
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switch (exp.Member.Name) {
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case "Days": return $"(({left}) div {(long)1000000 * 60 * 60 * 24})";
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case "Hours": return $"(({left}) div {(long)1000000 * 60 * 60} mod 24)";
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case "Milliseconds": return $"(({left}) div 1000 mod 1000)";
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case "Minutes": return $"(({left}) div {(long)1000000 * 60} mod 60)";
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case "Seconds": return $"(({left}) div 1000000 mod 60)";
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case "Ticks": return $"(({left}) * 10)";
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case "TotalDays": return $"(({left}) / {(long)1000000 * 60 * 60 * 24})";
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case "TotalHours": return $"(({left}) / {(long)1000000 * 60 * 60})";
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case "TotalMilliseconds": return $"(({left}) / 1000)";
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case "TotalMinutes": return $"(({left}) / {(long)1000000 * 60})";
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case "TotalSeconds": return $"(({left}) / 1000000)";
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}
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return null;
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}
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internal override string ExpressionLambdaToSqlCallString(MethodCallExpression exp, List<SelectTableInfo> _tables, List<SelectColumnInfo> _selectColumnMap, Func<Expression[], string> getSelectGroupingMapString, SelectTableInfoType tbtype, bool isQuoteName) {
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var left = ExpressionLambdaToSql(exp.Object, _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName);
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switch (exp.Method.Name) {
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case "StartsWith":
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case "EndsWith":
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case "Contains":
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var args0Value = ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName);
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if (args0Value == "NULL") return $"({left}) IS NULL";
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if (exp.Method.Name == "StartsWith") return $"({left}) LIKE {(args0Value.EndsWith("'") ? args0Value.Insert(args0Value.Length - 1, "%") : $"concat({args0Value}, '%')")}";
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if (exp.Method.Name == "EndsWith") return $"({left}) LIKE {(args0Value.StartsWith("'") ? args0Value.Insert(1, "%") : $"concat('%', {args0Value})")}";
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if (args0Value.StartsWith("'") && args0Value.EndsWith("'")) return $"({left}) LIKE {args0Value.Insert(1, "%").Insert(args0Value.Length, "%")}";
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return $"({left}) LIKE concat('%', {args0Value}, '%')";
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case "ToLower": return $"lower({left})";
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case "ToUpper": return $"upper({left})";
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case "Substring":
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var substrArgs1 = ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName);
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if (long.TryParse(substrArgs1, out var testtrylng1)) substrArgs1 = (testtrylng1 + 1).ToString();
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else substrArgs1 += "+1";
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if (exp.Arguments.Count == 1) return $"substr({left}, {substrArgs1})";
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return $"substr({left}, {substrArgs1}, {ExpressionLambdaToSql(exp.Arguments[1], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)})";
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case "IndexOf":
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var indexOfFindStr = ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName);
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if (exp.Arguments.Count > 1 && exp.Arguments[1].Type.FullName == "System.Int32") {
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var locateArgs1 = ExpressionLambdaToSql(exp.Arguments[1], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName);
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if (long.TryParse(locateArgs1, out var testtrylng2)) locateArgs1 = (testtrylng2 + 1).ToString();
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else locateArgs1 += "+1";
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return $"(locate({left}, {indexOfFindStr}, {locateArgs1})-1)";
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}
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return $"(locate({left}, {indexOfFindStr})-1)";
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case "PadLeft":
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if (exp.Arguments.Count == 1) return $"lpad({left}, {ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)})";
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return $"lpad({left}, {ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)}, {ExpressionLambdaToSql(exp.Arguments[1], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)})";
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case "PadRight":
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if (exp.Arguments.Count == 1) return $"rpad({left}, {ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)})";
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return $"rpad({left}, {ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)}, {ExpressionLambdaToSql(exp.Arguments[1], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)})";
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case "Trim":
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case "TrimStart":
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case "TrimEnd":
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if (exp.Arguments.Count == 0) {
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if (exp.Method.Name == "Trim") return $"trim({left})";
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if (exp.Method.Name == "TrimStart") return $"ltrim({left})";
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if (exp.Method.Name == "TrimEnd") return $"rtrim({left})";
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}
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foreach (var argsTrim02 in exp.Arguments) {
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var argsTrim01s = new[] { argsTrim02 };
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if (argsTrim02.NodeType == ExpressionType.NewArrayInit) {
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var arritem = argsTrim02 as NewArrayExpression;
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argsTrim01s = arritem.Expressions.ToArray();
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}
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foreach (var argsTrim01 in argsTrim01s) {
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if (exp.Method.Name == "Trim") left = $"trim({ExpressionLambdaToSql(argsTrim01, _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)} from {left})";
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if (exp.Method.Name == "TrimStart") left = $"trim(leading {ExpressionLambdaToSql(argsTrim01, _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)} from {left})";
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if (exp.Method.Name == "TrimEnd") left = $"trim(trailing {ExpressionLambdaToSql(argsTrim01, _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)} from {left})";
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}
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}
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return left;
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case "Replace": return $"replace({left}, {ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)}, {ExpressionLambdaToSql(exp.Arguments[1], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)})";
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case "CompareTo": return $"strcmp({left}, {ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)})";
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case "Equals": return $"({left} = {ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)})";
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}
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throw new Exception($"MySqlExpression 未现实函数表达式 {exp} 解析");
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}
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internal override string ExpressionLambdaToSqlCallMath(MethodCallExpression exp, List<SelectTableInfo> _tables, List<SelectColumnInfo> _selectColumnMap, Func<Expression[], string> getSelectGroupingMapString, SelectTableInfoType tbtype, bool isQuoteName) {
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switch (exp.Method.Name) {
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case "Abs": return $"abs({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)})";
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case "Sign": return $"sign({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)})";
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case "Floor": return $"floor({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)})";
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case "Ceiling": return $"ceiling({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)})";
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case "Round":
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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)})";
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return $"round({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)})";
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case "Exp": return $"exp({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)})";
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case "Log": return $"log({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)})";
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case "Log10": return $"log10({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)})";
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case "Pow": return $"pow({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)}, {ExpressionLambdaToSql(exp.Arguments[1], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)})";
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case "Sqrt": return $"sqrt({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)})";
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case "Cos": return $"cos({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)})";
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case "Sin": return $"sin({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)})";
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case "Tan": return $"tan({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)})";
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case "Acos": return $"acos({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)})";
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case "Asin": return $"asin({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)})";
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case "Atan": return $"atan({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)})";
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case "Atan2": return $"atan2({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)}, {ExpressionLambdaToSql(exp.Arguments[1], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)})";
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case "Truncate": return $"truncate({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)}, 0)";
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}
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throw new Exception($"MySqlExpression 未现实函数表达式 {exp} 解析");
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}
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internal override string ExpressionLambdaToSqlCallDateTime(MethodCallExpression exp, List<SelectTableInfo> _tables, List<SelectColumnInfo> _selectColumnMap, Func<Expression[], string> getSelectGroupingMapString, SelectTableInfoType tbtype, bool isQuoteName) {
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if (exp.Object == null) {
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switch (exp.Method.Name) {
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case "Compare": return $"({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)} - ({ExpressionLambdaToSql(exp.Arguments[1], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)}))";
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case "DaysInMonth": return $"dayofmonth(last_day(concat({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)}, '-', {ExpressionLambdaToSql(exp.Arguments[1], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)}, '-01')))";
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case "Equals": return $"({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)} = {ExpressionLambdaToSql(exp.Arguments[1], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)})";
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case "IsLeapYear":
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var isLeapYearArgs1 = ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName);
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return $"(({isLeapYearArgs1})%4=0 AND ({isLeapYearArgs1})%100<>0 OR ({isLeapYearArgs1})%400=0)";
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case "Parse": return $"cast({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)} as datetime)";
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case "ParseExact":
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case "TryParse":
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case "TryParseExact": return $"cast({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)} as datetime)";
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}
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} else {
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var left = ExpressionLambdaToSql(exp.Object, _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName);
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var args1 = exp.Arguments.Count == 0 ? null : ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName);
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switch (exp.Method.Name) {
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case "Add": return $"date_add({left}, interval ({args1}) microsecond)";
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case "AddDays": return $"date_add({left}, interval ({args1}) day)";
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case "AddHours": return $"date_add({left}, interval ({args1}) hour)";
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case "AddMilliseconds": return $"date_add({left}, interval ({args1})*1000 microsecond)";
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case "AddMinutes": return $"date_add({left}, interval ({args1}) minute)";
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case "AddMonths": return $"date_add({left}, interval ({args1}) month)";
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case "AddSeconds": return $"date_add({left}, interval ({args1}) second)";
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case "AddTicks": return $"date_add({left}, interval ({args1})/10 microsecond)";
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case "AddYears": return $"date_add({left}, interval ({args1}) year)";
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case "Subtract":
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if (exp.Arguments[0].Type.FullName == "System.DateTime" || exp.Arguments[0].Type.GenericTypeArguments.FirstOrDefault()?.FullName == "System.DateTime")
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return $"timestampdiff(microsecond, {args1}, {left})";
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if (exp.Arguments[0].Type.FullName == "System.TimeSpan" || exp.Arguments[0].Type.GenericTypeArguments.FirstOrDefault()?.FullName == "System.TimeSpan")
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return $"date_sub({left}, interval ({args1}) microsecond)";
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break;
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case "Equals": return $"({left} = {ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)})";
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case "CompareTo": return $"(({left}) - ({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)}))";
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case "ToString": return $"date_format({left}, '%Y-%m-%d %H:%i:%s.%f')";
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}
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}
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throw new Exception($"MySqlExpression 未现实函数表达式 {exp} 解析");
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}
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internal override string ExpressionLambdaToSqlCallTimeSpan(MethodCallExpression exp, List<SelectTableInfo> _tables, List<SelectColumnInfo> _selectColumnMap, Func<Expression[], string> getSelectGroupingMapString, SelectTableInfoType tbtype, bool isQuoteName) {
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if (exp.Object == null) {
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switch (exp.Method.Name) {
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case "Compare": return $"({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)}-({ExpressionLambdaToSql(exp.Arguments[1], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)}))";
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case "Equals": return $"({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)} = {ExpressionLambdaToSql(exp.Arguments[1], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)})";
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case "FromDays": return $"(({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)})*{(long)1000000 * 60 * 60 * 24})";
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case "FromHours": return $"(({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)})*{(long)1000000 * 60 * 60})";
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case "FromMilliseconds": return $"(({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)})*1000)";
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case "FromMinutes": return $"(({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)})*{(long)1000000 * 60})";
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case "FromSeconds": return $"(({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)})*1000000)";
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case "FromTicks": return $"(({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)})/10)";
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case "Parse": return $"cast({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)} as signed)";
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case "ParseExact":
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case "TryParse":
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case "TryParseExact": return $"cast({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)} as signed)";
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}
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} else {
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var left = ExpressionLambdaToSql(exp.Object, _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName);
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var args1 = exp.Arguments.Count == 0 ? null : ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName);
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switch (exp.Method.Name) {
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case "Add": return $"({left}+{args1})";
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case "Subtract": return $"({left}-({args1}))";
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case "Equals": return $"({left} = {ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)})";
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case "CompareTo": return $"({left}-({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)}))";
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case "ToString": return $"cast({left} as char)";
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}
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}
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throw new Exception($"MySqlExpression 未现实函数表达式 {exp} 解析");
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}
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internal override string ExpressionLambdaToSqlCallConvert(MethodCallExpression exp, List<SelectTableInfo> _tables, List<SelectColumnInfo> _selectColumnMap, Func<Expression[], string> getSelectGroupingMapString, SelectTableInfoType tbtype, bool isQuoteName) {
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if (exp.Object == null) {
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switch (exp.Method.Name) {
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case "ToBoolean": return $"({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)} not in ('0','false'))";
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case "ToByte": return $"cast({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)} as unsigned)";
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case "ToChar": return $"substr(cast({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)} as char), 1, 1)";
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case "ToDateTime": return $"cast({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)} as datetime)";
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case "ToDecimal": return $"cast({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)} as decimal(36,18))";
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case "ToDouble": return $"cast({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)} as decimal(32,16))";
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case "ToInt16":
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case "ToInt32":
|
|
case "ToInt64":
|
|
case "ToSByte": return $"cast({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)} as signed)";
|
|
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 char)";
|
|
case "ToUInt16":
|
|
case "ToUInt32":
|
|
case "ToUInt64": return $"cast({ExpressionLambdaToSql(exp.Arguments[0], _tables, _selectColumnMap, getSelectGroupingMapString, tbtype, isQuoteName)} as unsigned)";
|
|
}
|
|
}
|
|
throw new Exception($"MySqlExpression 未现实函数表达式 {exp} 解析");
|
|
}
|
|
}
|
|
}
|