using FreeSql.Internal; using System; using System.Collections; using System.Linq; using System.Linq.Expressions; using System.Text; using System.Text.RegularExpressions; namespace FreeSql.Firebird { class FirebirdExpression : CommonExpression { public FirebirdExpression(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','false'))"; 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 ExpressionConstDateTime(operandExp) ?? $"cast({getExp(operandExp)} as timestamp)"; 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 blob sub_type 1)"; 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','false'))"; 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 ExpressionConstDateTime(callExp.Arguments[0]) ?? $"cast({getExp(callExp.Arguments[0])} as timestamp)"; 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 blob sub_type 1)"; 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 "cast(rand()*1000000000 as integer)"; 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) { 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 blob sub_type 1)" : 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 "timestamp '0001/1/1 0:00:00'"; case "MaxValue": return "timestamp'9999/12/31 23:59:59'"; } return null; } var left = ExpressionLambdaToSql(exp.Expression, tsc); switch (exp.Member.Name) { case "Date": return $"cast(extract(year from {left}) || '-' || extract(month from {left}) || '-' || extract(day from {left}) as timestamp)"; case "TimeOfDay": return $"datediff(second from cast(extract(year from {left}) || '-' || extract(month from {left}) || '-' || extract(day from {left}) as timestamp) to {left})"; case "DayOfWeek": return $"extract(weekday from {left})"; case "Day": return $"extract(day from {left})"; case "DayOfYear": return $"datediff(day from {left} to cast(extract(year from {left}) || '-' || extract(month from {left}) || '-' || extract(day from {left}) as timestamp))"; case "Month": return $"extract(month from {left})"; case "Year": return $"extract(year from {left})"; case "Hour": return $"extract(hour from {left})"; case "Minute": return $"extract(minute from {left})"; case "Second": return $"extract(second from {left})"; case "Millisecond": return $"extract(millisecond from {left})"; case "Ticks": return $"(extract(second from {left})*10000000+621355968000000000)"; } return null; } public override string ExpressionLambdaToSqlMemberAccessTimeSpan(MemberExpression exp, ExpTSC tsc) { if (exp.Expression == null) { switch (exp.Member.Name) { case "Zero": return "0"; case "MinValue": return "-922337203685.477580"; //秒 Ticks / 1000,000,0 case "MaxValue": return "922337203685.477580"; } return null; } var left = ExpressionLambdaToSql(exp.Expression, tsc); switch (exp.Member.Name) { case "Days": return $"floor(({left})/{60 * 60 * 24})"; case "Hours": return $"mod(({left})/{60 * 60},24)"; case "Milliseconds": return $"(cast({left} as bigint)*1000)"; case "Minutes": return $"mod(({left})/60,60)"; case "Seconds": return $"mod({left},60)"; case "Ticks": return $"(cast({left} as bigint)*10000000)"; case "TotalDays": return $"(({left})/{60 * 60 * 24})"; case "TotalHours": return $"(({left})/{60 * 60})"; case "TotalMilliseconds": return $"(cast({left} as bigint)*1000)"; case "TotalMinutes": return $"(({left})/60)"; case "TotalSeconds": return $"({left})"; } return null; } public override string ExpressionLambdaToSqlCallString(MethodCallExpression exp, ExpTSC tsc) { Func 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("StringJoinFirebirdList"), 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 $"position({args0Value}, {left}) = 1"; if (exp.Method.Name == "EndsWith") return $"position({args0Value}, {left}) = char_length({left})-char_length({args0Value})+1"; return $"position({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}) CONTAINING {args0Value}"; return $"({left}) CONTAINING ({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 $"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 $"(position({indexOfFindStr}, {left}, {locateArgs1})-1)"; } return $"(position({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 $"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])}, {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 $"extract(day from dateadd(-1 day to dateadd(1 month to cast({getExp(exp.Arguments[0])}||'-'||{getExp(exp.Arguments[1])}||'-01' as date))))"; 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 ExpressionConstDateTime(exp.Arguments[0]) ?? $"cast({getExp(exp.Arguments[0])} as timestamp)"; case "ParseExact": case "TryParse": case "TryParseExact": return ExpressionConstDateTime(exp.Arguments[0]) ?? $"cast({getExp(exp.Arguments[0])} as timestamp)"; } } else { var left = getExp(exp.Object); var args1 = exp.Arguments.Count == 0 ? null : getExp(exp.Arguments[0]); switch (exp.Method.Name) { case "Add": return $"dateadd({args1} second to {left})"; case "AddDays": return $"dateadd({args1} day to {left})"; case "AddHours": return $"dateadd({args1} hour to {left})"; case "AddMilliseconds": return $"dateadd(({args1})/1000 second to {left})"; case "AddMinutes": return $"dateadd({args1} minute to {left})"; case "AddMonths": return $"dateadd({args1} month to {left})"; case "AddSeconds": return $"dateadd({args1} second to {left})"; case "AddTicks": return $"dateadd(({args1})/10000000 second to {left})"; case "AddYears": return $"dateadd({args1} year to {left})"; case "Subtract": switch ((exp.Arguments[0].Type.IsNullableType() ? exp.Arguments[0].Type.GetGenericArguments().FirstOrDefault() : exp.Arguments[0].Type).FullName) { case "System.DateTime": return $"datediff(second from {left} to {args1})"; case "System.TimeSpan": return $"dateadd(({args1})*-1 second to {left})"; } break; case "Equals": return $"({left} = {args1})"; case "CompareTo": return $"datediff(second from {left} to {args1})"; case "ToString": if (left.EndsWith(" as timestamp)") == false && left.StartsWith("timestamp") == false) left = $"cast({left} as timestamp)"; if (exp.Arguments.Count == 0) return $"lpad(extract(year from {left}),4,'0')||'-'||lpad(extract(month from {left}),2,'0')||'-'||lpad(extract(day from {left}),2,'0')||' '||lpad(extract(hour from {left}),2,'0')||':'||lpad(extract(minute from {left}),2,'0')||':'||lpad(trunc(extract(second from {left})),2,'0')"; switch (args1.TrimStart('N')) { case "'yyyyMMdd'": return $"lpad(extract(year from {left}),4,'0')||lpad(extract(month from {left}),2,'0')||lpad(extract(day from {left}),2,'0')"; case "'yyyyMM'": return $"lpad(extract(year from {left}),4,'0')||lpad(extract(month from {left}),2,'0')"; case "'yyyy'": return $"lpad(extract(year from {left}),4,'0')"; } var isMatched = false; args1 = Regex.Replace(args1, "(yyyy|yy|MM|M|dd|d|HH|H|hh|h|mm|m|ss|s|tt|t)", m => { isMatched = true; switch (m.Groups[1].Value) { case "yyyy": return $"'||lpad(extract(year from {left}),4,'0')||'"; case "yy": return $"'||substring(lpad(extract(year from {left}),4,'0') from 3 for 2)||'"; case "MM": return $"'||lpad(extract(month from {left}),2,'0')||'"; case "M": return $"'||extract(month from {left})||'"; case "dd": return $"'||lpad(extract(day from {left}),2,'0')||'"; case "d": return $"'||extract(day from {left})||'"; case "HH": return $"'||lpad(extract(hour from {left}),2,'0')||'"; case "H": return $"'||extract(hour from {left})||'"; case "hh": return $"'||case when mod(extract(hour from {left}),12) = 0 then '12' else lpad(mod(extract(hour from {left}),12),2,'0') end||'"; case "h": return $"'||trim(case when mod(extract(hour from {left}),12) = 0 then '12' else mod(extract(hour from {left}),12) end)||'"; case "mm": return $"'||lpad(extract(minute from {left}),2,'0')||'"; case "m": return $"'||extract(minute from {left})||'"; case "ss": return $"'||lpad(trunc(extract(second from {left})),2,'0')||'"; case "s": return $"'||trunc(extract(second from {left}))||'"; case "tt": return $"'||case when extract(hour from {left}) >= 12 then 'PM' else 'AM' end||'"; case "t": return $"'||case when extract(hour from {left}) >= 12 then 'P' else 'A' end||'"; } return m.Groups[0].Value; }); return isMatched == false ? args1 : $"({args1})"; } } 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])})*{60 * 60 * 24})"; case "FromHours": return $"(({getExp(exp.Arguments[0])})*{60 * 60})"; case "FromMilliseconds": return $"(({getExp(exp.Arguments[0])})/1000)"; case "FromMinutes": return $"(({getExp(exp.Arguments[0])})*60)"; case "FromSeconds": return $"(({getExp(exp.Arguments[0])}))"; case "FromTicks": return $"(({getExp(exp.Arguments[0])})/10000000)"; case "Parse": return $"cast({getExp(exp.Arguments[0])} as bigint)"; case "ParseExact": case "TryParse": case "TryParseExact": return $"cast({getExp(exp.Arguments[0])} as bigint)"; } } else { var left = getExp(exp.Object); var args1 = exp.Arguments.Count == 0 ? null : getExp(exp.Arguments[0]); switch (exp.Method.Name) { case "Add": return $"({left}+{args1})"; case "Subtract": return $"({left}-({args1}))"; case "Equals": return $"({left} = {args1})"; case "CompareTo": return $"({left}-({args1}))"; case "ToString": return $"cast({left} as varchar(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 ExpressionConstDateTime(exp.Arguments[0]) ?? $"cast({getExp(exp.Arguments[0])} as timestamp)"; 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 blob sub_type 1)"; 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; } } }