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.MySql { class MySqlExpression : CommonExpression { public MySqlExpression(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 $"({getExp(operandExp)} not in ('0','false'))"; case "System.Byte": return $"cast({getExp(operandExp)} as unsigned)"; case "System.Char": return $"substr(cast({getExp(operandExp)} as char), 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": case "System.Int32": case "System.Int64": case "System.SByte": return $"cast({getExp(operandExp)} as signed)"; case "System.Single": return $"cast({getExp(operandExp)} as decimal(14,7))"; case "System.String": return $"cast({getExp(operandExp)} as char)"; case "System.UInt16": case "System.UInt32": case "System.UInt64": return $"cast({getExp(operandExp)} as unsigned)"; case "System.Guid": return $"substr(cast({getExp(operandExp)} as char), 1, 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 $"({getExp(callExp.Arguments[0])} not in ('0','false'))"; case "System.Byte": return $"cast({getExp(callExp.Arguments[0])} as unsigned)"; case "System.Char": return $"substr(cast({getExp(callExp.Arguments[0])} as char), 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": case "System.Int32": case "System.Int64": case "System.SByte": return $"cast({getExp(callExp.Arguments[0])} as signed)"; case "System.Single": return $"cast({getExp(callExp.Arguments[0])} as decimal(14,7))"; case "System.UInt16": case "System.UInt32": case "System.UInt64": return $"cast({getExp(callExp.Arguments[0])} as unsigned)"; case "System.Guid": return $"substr(cast({getExp(callExp.Arguments[0])} as char), 1, 36)"; } return null; case "NewGuid": return null; case "Next": if (callExp.Object?.Type == typeof(Random)) return "cast(rand()*1000000000 as signed)"; return null; case "NextDouble": if (callExp.Object?.Type == typeof(Random)) return "rand()"; return null; case "Random": if (callExp.Method.DeclaringType.IsNumberType()) return "rand()"; return null; case "ToString": if (callExp.Object != null) return callExp.Arguments.Count == 0 ? $"cast({getExp(callExp.Object)} as char)" : 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 == null) objType = callExp.Method.DeclaringType; if (objType != null || objType.IsArrayOrList()) { tsc.SetMapColumnTmp(null); var args1 = getExp(callExp.Arguments[argIndex]); var oldMapType = tsc.SetMapTypeReturnOld(tsc.mapTypeTmp); var oldDbParams = tsc.SetDbParamsReturnOld(null); var left = objExp == null ? null : getExp(objExp); tsc.SetMapColumnTmp(null).SetMapTypeReturnOld(oldMapType); 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.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 $"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 "curdate()"; case "MinValue": return "cast('0001/1/1 0:00:00' as datetime)"; case "MaxValue": return "cast('9999/12/31 23:59:59' as datetime)"; } 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 $"timestampdiff(microsecond, date_format({left},'%Y-%m-%d'), {left})"; case "DayOfWeek": return $"(dayofweek({left})-1)"; case "Day": return $"dayofmonth({left})"; case "DayOfYear": return $"dayofyear({left})"; case "Month": return $"month({left})"; case "Year": return $"year({left})"; case "Hour": return $"hour({left})"; case "Minute": return $"minute({left})"; case "Second": return $"second({left})"; case "Millisecond": return $"floor(microsecond({left})/1000)"; case "Ticks": return $"(timestampdiff(microsecond, '0001-1-1', {left})*10)"; } 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 $"(({left}) div {(long)1000000 * 60 * 60 * 24})"; case "Hours": return $"(({left}) div {(long)1000000 * 60 * 60} mod 24)"; case "Milliseconds": return $"(({left}) div 1000 mod 1000)"; case "Minutes": return $"(({left}) div {(long)1000000 * 60} mod 60)"; case "Seconds": return $"(({left}) div 1000000 mod 60)"; case "Ticks": return $"(({left}) * 10)"; case "TotalDays": return $"(({left}) / {(long)1000000 * 60 * 60 * 24})"; case "TotalHours": return $"(({left}) / {(long)1000000 * 60 * 60})"; case "TotalMilliseconds": return $"(({left}) / 1000)"; case "TotalMinutes": return $"(({left}) / {(long)1000000 * 60})"; case "TotalSeconds": return $"(({left}) / 1000000)"; } 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(), null); } } 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, "%") : $"concat({args0Value}, '%')")}"; if (exp.Method.Name == "EndsWith") return $"({left}) LIKE {(args0Value.StartsWith("'") ? args0Value.Insert(1, "%") : $"concat('%', {args0Value})")}"; if (args0Value.StartsWith("'") && args0Value.EndsWith("'")) return $"({left}) LIKE {args0Value.Insert(1, "%").Insert(args0Value.Length, "%")}"; return $"({left}) LIKE concat('%', {args0Value}, '%')"; 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": 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 $"(locate({left}, {indexOfFindStr}, {locateArgs1})-1)"; } return $"(locate({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": 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})"; } 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) { if (exp.Method.Name == "Trim") left = $"trim({getExp(argsTrim01)} from {left})"; if (exp.Method.Name == "TrimStart") left = $"trim(leading {getExp(argsTrim01)} from {left})"; if (exp.Method.Name == "TrimEnd") left = $"trim(trailing {getExp(argsTrim01)} from {left})"; } } return left; case "Replace": return $"replace({left}, {getExp(exp.Arguments[0])}, {getExp(exp.Arguments[1])})"; case "CompareTo": return $"strcmp({left}, {getExp(exp.Arguments[0])})"; case "Equals": return $"({left} = {getExp(exp.Arguments[0])})"; } } return null; } 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])})"; 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 $"truncate({getExp(exp.Arguments[0])}, 0)"; } return null; } 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 $"dayofmonth(last_day(concat({getExp(exp.Arguments[0])}, '-', {getExp(exp.Arguments[1])}, '-01')))"; 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 $"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 $"timestampdiff(microsecond, {args1}, {left})"; case "System.TimeSpan": return $"date_sub({left}, interval ({args1}) microsecond)"; } break; case "Equals": return $"({left} = {args1})"; case "CompareTo": return $"timestampdiff(microsecond,{args1},{left})"; case "ToString": return exp.Arguments.Count == 0 ? $"date_format({left}, '%Y-%m-%d %H:%i:%s.%f')" : null; } } return null; } 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])})*{(long)1000000 * 60 * 60 * 24})"; case "FromHours": return $"(({getExp(exp.Arguments[0])})*{(long)1000000 * 60 * 60})"; case "FromMilliseconds": return $"(({getExp(exp.Arguments[0])})*1000)"; case "FromMinutes": return $"(({getExp(exp.Arguments[0])})*{(long)1000000 * 60})"; case "FromSeconds": return $"(({getExp(exp.Arguments[0])})*1000000)"; case "FromTicks": return $"(({getExp(exp.Arguments[0])})/10)"; case "Parse": return $"cast({getExp(exp.Arguments[0])} as signed)"; case "ParseExact": case "TryParse": case "TryParseExact": return $"cast({getExp(exp.Arguments[0])} as signed)"; } } 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 char)"; } } return null; } 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 $"({getExp(exp.Arguments[0])} not in ('0','false'))"; case "ToByte": return $"cast({getExp(exp.Arguments[0])} as unsigned)"; case "ToChar": return $"substr(cast({getExp(exp.Arguments[0])} as char), 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": case "ToInt32": case "ToInt64": case "ToSByte": return $"cast({getExp(exp.Arguments[0])} as signed)"; case "ToSingle": return $"cast({getExp(exp.Arguments[0])} as decimal(14,7))"; case "ToString": return $"cast({getExp(exp.Arguments[0])} as char)"; case "ToUInt16": case "ToUInt32": case "ToUInt64": return $"cast({getExp(exp.Arguments[0])} as unsigned)"; } } return null; } } }