using FreeSql.Internal; using System; using System.Collections; using System.Linq; using System.Linq.Expressions; using System.Text; using System.Text.RegularExpressions; namespace FreeSql.GBase { class GBaseExpression : CommonExpression { public GBaseExpression(CommonUtils common) : base(common) { } public override string ExpressionLambdaToSqlOther(Expression exp, ExpTSC tsc) { Func getExp = exparg => ExpressionLambdaToSql(exparg, tsc); switch (exp.NodeType) { case ExpressionType.ArrayLength: var arrOper = (exp as UnaryExpression)?.Operand; if (arrOper.Type == typeof(byte[])) return $"octet_length({getExp(arrOper)})"; break; 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','F','f'))"; case "System.Byte": return $"cast({getExp(operandExp)} as smallint)"; case "System.Char": return $"substring(cast({getExp(operandExp)} as varchar(10)) from 1 for 1)"; case "System.DateTime": return $"to_date({getExp(operandExp)})"; case "System.Decimal": return $"cast({getExp(operandExp)} as decimal(18,6))"; case "System.Double": return $"cast({getExp(operandExp)} as decimal(18,10))"; case "System.Int16": return $"cast({getExp(operandExp)} as smallint)"; case "System.Int32": return $"cast({getExp(operandExp)} as integer)"; case "System.Int64": return $"cast({getExp(operandExp)} as bigint)"; case "System.SByte": return $"cast({getExp(operandExp)} as smallint)"; case "System.Single": return $"cast({getExp(operandExp)} as decimal(14,7))"; case "System.String": return $"cast({getExp(operandExp)} as varchar(8000))"; case "System.UInt16": return $"cast({getExp(operandExp)} as integer)"; case "System.UInt32": return $"cast({getExp(operandExp)} as bigint)"; case "System.UInt64": return $"cast({getExp(operandExp)} as decimal(21,0))"; case "System.Guid": return $"substring(cast({getExp(operandExp)} as char(36)) from 1 for 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','F','f'))"; case "System.Byte": return $"cast({getExp(callExp.Arguments[0])} as smallint)"; case "System.Char": return $"substring(cast({getExp(callExp.Arguments[0])} as varchar(10)) from 1 for 1)"; case "System.DateTime": return $"to_date({getExp(callExp.Arguments[0])})"; case "System.Decimal": return $"cast({getExp(callExp.Arguments[0])} as decimal(18,6))"; case "System.Double": return $"cast({getExp(callExp.Arguments[0])} as decimal(18,10))"; case "System.Int16": return $"cast({getExp(callExp.Arguments[0])} as smallint)"; case "System.Int32": return $"cast({getExp(callExp.Arguments[0])} as integer)"; case "System.Int64": return $"cast({getExp(callExp.Arguments[0])} as bigint)"; case "System.SByte": return $"cast({getExp(callExp.Arguments[0])} as smallint)"; case "System.Single": return $"cast({getExp(callExp.Arguments[0])} as decimal(14,7))"; case "System.String": return $"cast({getExp(callExp.Arguments[0])} as varchar(8000))"; case "System.UInt16": return $"cast({getExp(callExp.Arguments[0])} as integer)"; case "System.UInt32": return $"cast({getExp(callExp.Arguments[0])} as bigint)"; case "System.UInt64": return $"cast({getExp(callExp.Arguments[0])} as decimal(18,0))"; case "System.Guid": return $"substring(cast({getExp(callExp.Arguments[0])} as char(36)) from 1 for 36)"; } return null; case "NewGuid": return null; case "Next": if (callExp.Object?.Type == typeof(Random)) return "random()"; return null; case "NextDouble": if (callExp.Object?.Type == typeof(Random)) return "cast(random() as float)"; 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 varchar(8000))" : 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()) { 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.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(","); if (a % 500 == 499) arrSb.Append(" \r\n \r\n"); //500元素分割, 3空格\r\n4空格 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 "current_date"; case "MinValue": return "to_date('0001-1-1', 'YYYY-MM-DD')"; case "MaxValue": return "to_date('9999-12-31 23:59:59', 'YYYY-MM-DD HH24:MI:SS')"; } return null; } var left = ExpressionLambdaToSql(exp.Expression, tsc); switch (exp.Member.Name) { case "Date": return $"to_date(to_char({left}, 'YYYY-MM-DD'), 'YYYY-MM-DD')"; case "TimeOfDay": return $"('0 '||to_char({left}, 'HH24:MI:SS.FF3'))::interval day(9) to fraction"; case "DayOfWeek": return $"weekday({left})"; case "Day": return $"day({left})"; case "DayOfYear": return $"cast(to_char({left},'DDD') as int)"; case "Month": return $"month({left})"; case "Year": return $"year({left})"; case "Hour": return $"cast(to_char({left},'HH24') as int)"; case "Minute": return $"cast(to_char({left},'MI') as int)"; case "Second": return $"cast(to_char({left},'SS') as int)"; case "Millisecond": return $"cast(to_char({left},'FF3') as int)"; //case "Ticks": return $"cast(to_char({left},'FF7') as bigint)"; } 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 "interval(0) day(9) to fraction"; //秒 Ticks / 1000,000,0 case "MaxValue": return "interval(99 23:59:59.999) day(9) to fraction"; } return null; } var left = ExpressionLambdaToSql(exp.Expression, tsc); switch (exp.Member.Name) { case "Days": return $"({left})::interval day(9) to day::varchar(40)::int8"; case "Hours": return $"substr(substring_index(({left})::varchar(40),' ',-1),1,2)::int8"; case "Milliseconds": return $"substring_index(({left})::varchar(40),'.',-1)::int8"; case "Minutes": return $"substr(substring_index(({left})::varchar(40),' ',-1),4,2)::int8"; case "Seconds": return $"substr(substring_index(({left})::varchar(40),' ',-1),7,2)::int8"; case "Ticks": return $"(({left})::interval day(9) to day::varchar(40)::int8 *24*60*60*1000 + substr(substring_index(({left})::varchar(40),' ',-1),1,2)::int8 *60*60*1000 + substr(substring_index(({left})::varchar(40),' ',-1),4,2)::int8 *60*1000 + substr(substring_index(({left})::varchar(40),' ',-1),7,2)::int8 *1000 + substring_index(({left})::varchar(40),'.',-1)::int8) * 10000"; case "TotalDays": return $"(({left})::interval day(9) to day::varchar(40)::int8 *24 + substr(substring_index(({left})::varchar(40),' ',-1),1,2)::int8) /24.0"; case "TotalHours": return $"(({left})::interval day(9) to day::varchar(40)::int8 *24*60 + substr(substring_index(({left})::varchar(40),' ',-1),1,2)::int8 *60 + substr(substring_index(({left})::varchar(40),' ',-1),4,2)::int8) /60.0"; case "TotalMilliseconds": return $"(({left})::interval day(9) to day::varchar(40)::int8 *24*60*60*1000 + substr(substring_index(({left})::varchar(40),' ',-1),1,2)::int8 *60*60*1000 + substr(substring_index(({left})::varchar(40),' ',-1),4,2)::int8 *60*1000 + substr(substring_index(({left})::varchar(40),' ',-1),7,2)::int8 *1000 + substring_index(({left})::varchar(40),'.',-1)::int8)"; case "TotalMinutes": return $"(({left})::interval day(9) to day::varchar(40)::int8 *24*60*60 + substr(substring_index(({left})::varchar(40),' ',-1),1,2)::int8 *60*60 + substr(substring_index(({left})::varchar(40),' ',-1),4,2)::int8 *60 + substr(substring_index(({left})::varchar(40),' ',-1),7,2)::int8) /60.0"; case "TotalSeconds": return $"(({left})::interval day(9) to day::varchar(40)::int8 *24*60*60*1000 + substr(substring_index(({left})::varchar(40),' ',-1),1,2)::int8 *60*60*1000 + substr(substring_index(({left})::varchar(40),' ',-1),4,2)::int8 *60*1000 + substr(substring_index(({left})::varchar(40),' ',-1),7,2)::int8 *1000 + substring_index(({left})::varchar(40),'.',-1)::int8) /1000.0"; } 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 trim({arg2}) = '')"; case "Concat": if (exp.Arguments.Count == 1 && exp.Arguments[0].NodeType == ExpressionType.NewArrayInit && exp.Arguments[0] is NewArrayExpression concatNewArrExp) return _common.StringConcat(concatNewArrExp.Expressions.Select(a => getExp(a)).ToArray(), null); 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 => $"'||{_common.IsNull(ExpressionLambdaToSql(a, tsc), "''")}||'").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("StringJoinGBaseWmConcatText"), 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 $"instr({args0Value}, {left}) = 1"; if (exp.Method.Name == "EndsWith") return $"instr({args0Value}, {left}) = char_length({left})-char_length({args0Value})+1"; return $"instr({args0Value}, {left}) > 0"; } if (exp.Method.Name == "StartsWith") return $"({left}) LIKE {(args0Value.EndsWith("'") ? args0Value.Insert(args0Value.Length - 1, "%") : $"({args0Value})||'%'")}"; if (exp.Method.Name == "EndsWith") return $"({left}) LIKE {(args0Value.StartsWith("'") ? args0Value.Insert(1, "%") : $"'%'||({args0Value})")}"; if (args0Value.StartsWith("'") && args0Value.EndsWith("'")) return $"({left}) LIKE {args0Value.Insert(1, "%").Insert(args0Value.Length, "%")}"; return $"({left}) LIKE ('%'||cast({args0Value} as varchar(8000))||'%')"; 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 $"substring({left} from {substrArgs1})"; return $"substring({left} from {substrArgs1} for {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 $"(instr({indexOfFindStr}, {left}, {locateArgs1})-1)"; } return $"(instr({indexOfFindStr}, {left})-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 $"trim(leading from {left})"; if (exp.Method.Name == "TrimEnd") return $"trim(trailing from {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 $"case when {left} = {getExp(exp.Arguments[0])} then 0 when {left} > {getExp(exp.Arguments[0])} then 1 else -1 end"; 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 $"ceil({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])}, {getExp(exp.Arguments[1])})"; case "Log10": return $"log10({getExp(exp.Arguments[0])})"; case "Pow": return $"power({getExp(exp.Arguments[0])}, {getExp(exp.Arguments[1])})"; case "Sqrt": return $"sqrt({getExp(exp.Arguments[0])})"; case "Cos": return $"cos({getExp(exp.Arguments[0])})"; case "Sin": return $"sin({getExp(exp.Arguments[0])})"; case "Tan": return $"tan({getExp(exp.Arguments[0])})"; case "Acos": return $"acos({getExp(exp.Arguments[0])})"; case "Asin": return $"asin({getExp(exp.Arguments[0])})"; case "Atan": return $"atan({getExp(exp.Arguments[0])})"; case "Atan2": return $"atan2({getExp(exp.Arguments[0])}, {getExp(exp.Arguments[1])})"; case "Truncate": return $"trunc({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 $"cast(to_char(last_day(to_date(({getExp(exp.Arguments[0])})||'-'||({getExp(exp.Arguments[1])})||'-01','yyyy-mm-dd')),'DD') as int)"; case "Equals": return $"({getExp(exp.Arguments[0])} = {getExp(exp.Arguments[1])})"; case "IsLeapYear": var isLeapYearArgs1 = getExp(exp.Arguments[0]); return $"mod({isLeapYearArgs1},4)=0 AND mod({isLeapYearArgs1},100)<>0 OR mod({isLeapYearArgs1},400)=0"; case "Parse": return $"to_date({getExp(exp.Arguments[0])})"; case "ParseExact": case "TryParse": case "TryParseExact": return $"to_date({getExp(exp.Arguments[0])})"; } } 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 "AddDays": return $"({left} + ({args1}) units day)"; case "AddHours": return $"({left} + ({args1}) units hour)"; case "AddMilliseconds": return $"({left} + ({args1})/1000 units fraction)"; case "AddMinutes": return $"({left} + ({args1}) units minute)"; case "AddMonths": return $"({left} + ({args1}) units month)"; case "AddSeconds": return $"({left} + ({args1}) units second)"; case "AddTicks": return $"({left} + ({args1})/10000000 units fraction)"; case "AddYears": return $"({left} + ({args1}) units year)"; case "Subtract": switch ((exp.Arguments[0].Type.IsNullableType() ? exp.Arguments[0].Type.GetGenericArguments().FirstOrDefault() : exp.Arguments[0].Type).FullName) { case "System.DateTime": return $"({left} - {args1})"; case "System.TimeSpan": return $"({left} - {args1})"; } break; case "Equals": return $"({left} = {args1})"; case "CompareTo": return $"({left} - {args1})"; case "ToString": var defaultFmt = "'YYYY-MM-DD HH24:MI:SS'"; if (left.StartsWith("'") || left.EndsWith("'")) { var precision = left.LastIndexOf('.'); if (precision != -1) { precision = left.Substring(precision).Length - 2; if (precision > 0) defaultFmt = $"'YYYY-MM-DD HH24:MI:SS.FF{precision}'"; } left = $"to_date({left},{defaultFmt})"; } if (exp.Arguments.Count == 0) return $"to_char({left},{defaultFmt})"; switch (args1) { case "'yyyy-MM-dd HH:mm:ss'": return $"to_char({left},'YYYY-MM-DD HH24:MI:SS')"; case "'yyyy-MM-dd HH:mm'": return $"to_char({left},'YYYY-MM-DD HH24:MI')"; case "'yyyy-MM-dd HH'": return $"to_char({left},'YYYY-MM-DD HH24')"; case "'yyyy-MM-dd'": return $"to_char({left},'YYYY-MM-DD')"; case "'yyyy-MM'": return $"to_char({left},'YYYY-MM')"; case "'yyyyMMddHHmmss'": return $"to_char({left},'YYYYMMDDHH24MISS')"; case "'yyyyMMddHHmm'": return $"to_char({left},'YYYYMMDDHH24MI')"; case "'yyyyMMddHH'": return $"to_char({left},'YYYYMMDDHH24')"; case "'yyyyMMdd'": return $"to_char({left},'YYYYMMDD')"; case "'yyyyMM'": return $"to_char({left},'YYYYMM')"; case "'yyyy'": return $"to_char({left},'YYYY')"; case "'HH:mm:ss'": return $"to_char({left},'HH24:MI:SS')"; } args1 = Regex.Replace(args1, "(yyyy|yy|MM|dd|HH|hh|mm|ss|tt)", m => { switch (m.Groups[1].Value) { case "yyyy": return $"YYYY"; case "yy": return $"YY"; case "MM": return $"%_a1"; case "dd": return $"%_a2"; case "HH": return $"%_a3"; case "hh": return $"%_a4"; case "mm": return $"%_a5"; case "ss": return $"SS"; case "tt": return $"%_a6"; } return m.Groups[0].Value; }); var argsFinds = new[] { "YYYY", "YY", "%_a1", "%_a2", "%_a3", "%_a4", "%_a5", "SS", "%_a6" }; var argsSpts = Regex.Split(args1, "(M|d|H|h|m|s|t)"); for (var a = 0; a < argsSpts.Length; a++) { switch (argsSpts[a]) { case "M": argsSpts[a] = $"ltrim(to_char({left},'MM'),'0')"; break; case "d": argsSpts[a] = $"case when substr(to_char({left},'DD'),1,1) = '0' then substr(to_char({left},'DD'),2,1) else to_char({left},'DD') end"; break; case "H": argsSpts[a] = $"case when substr(to_char({left},'HH24'),1,1) = '0' then substr(to_char({left},'HH24'),2,1) else to_char({left},'HH24') end"; break; case "h": argsSpts[a] = $"case when substr(to_char({left},'HH12'),1,1) = '0' then substr(to_char({left},'HH12'),2,1) else to_char({left},'HH12') end"; break; case "m": argsSpts[a] = $"case when substr(to_char({left},'MI'),1,1) = '0' then substr(to_char({left},'MI'),2,1) else to_char({left},'MI') end"; break; case "s": argsSpts[a] = $"case when substr(to_char({left},'SS'),1,1) = '0' then substr(to_char({left},'SS'),2,1) else to_char({left},'SS') end"; break; case "t": argsSpts[a] = $"rtrim(to_char({left},'AM'),'M')"; 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)) ? $"to_char({left},'{argsSptsA}')" : $"'{argsSptsA}'"; break; } } if (argsSpts.Length > 0) args1 = $"({string.Join(" || ", argsSpts.Where(a => a != "''"))})"; return args1.Replace("%_a1", "MM").Replace("%_a2", "DD").Replace("%_a3", "HH24").Replace("%_a4", "HH12").Replace("%_a5", "MI").Replace("%_a6", "AM"); } } 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 $"(interval(0) day(9) to fraction + ({getExp(exp.Arguments[0])}) units day)"; case "FromHours": return $"(interval(0) day(9) to fraction + ({getExp(exp.Arguments[0])}) units hour)"; case "FromMilliseconds": return $"(interval(0) day(9) to fraction + ({getExp(exp.Arguments[0])})/1000 units fraction)"; case "FromMinutes": return $"(interval(0) day(9) to fraction + ({getExp(exp.Arguments[0])}) units minute)"; case "FromSeconds": return $"(interval(0) day(9) to fraction + ({getExp(exp.Arguments[0])}) units second)"; case "FromTicks": return $"(interval(0) day(9) to fraction + ({getExp(exp.Arguments[0])})/10000000 units fraction)"; case "Parse": return $"cast({getExp(exp.Arguments[0])} as interval day(9) to fraction)"; case "ParseExact": case "TryParse": case "TryParseExact": return $"cast({getExp(exp.Arguments[0])} as interval day(9) to fraction)"; } } 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(50))"; } } 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 smallint)"; case "ToChar": return $"substring(cast({getExp(exp.Arguments[0])} as varchar(10)) from 1 for 1)"; case "ToDateTime": return $"to_date({getExp(exp.Arguments[0])})"; case "ToDecimal": return $"cast({getExp(exp.Arguments[0])} as decimal(18,6))"; case "ToDouble": return $"cast({getExp(exp.Arguments[0])} as decimal(18,10))"; case "ToInt16": return $"cast({getExp(exp.Arguments[0])} as smallint)"; case "ToInt32": return $"cast({getExp(exp.Arguments[0])} as integer)"; case "ToInt64": return $"cast({getExp(exp.Arguments[0])} as bigint)"; case "ToSByte": return $"cast({getExp(exp.Arguments[0])} as smallint)"; case "ToSingle": return $"cast({getExp(exp.Arguments[0])} as decimal(14,7))"; case "ToString": return $"cast({getExp(exp.Arguments[0])} as varchar(8000))"; case "ToUInt16": return $"cast({getExp(exp.Arguments[0])} as integer)"; case "ToUInt32": return $"cast({getExp(exp.Arguments[0])} as bigint)"; case "ToUInt64": return $"cast({getExp(exp.Arguments[0])} as decimal(18,0))"; } } return null; } } }