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.Sqlite { class SqliteExpression : CommonExpression { public SqliteExpression(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 (exp.Type.NullableTypeOrThis().ToString()) { case "System.Boolean": return $"({getExp(operandExp)} not in ('0','false'))"; case "System.Byte": return $"cast({getExp(operandExp)} as int2)"; case "System.Char": return $"substr(cast({getExp(operandExp)} as character), 1, 1)"; case "System.DateTime": return $"datetime({getExp(operandExp)})"; case "System.Decimal": return $"cast({getExp(operandExp)} as decimal(36,18))"; case "System.Double": return $"cast({getExp(operandExp)} as double)"; case "System.Int16": case "System.Int32": case "System.Int64": case "System.SByte": return $"cast({getExp(operandExp)} as smallint)"; case "System.Single": return $"cast({getExp(operandExp)} as float)"; case "System.String": return $"cast({getExp(operandExp)} as character)"; case "System.UInt16": return $"cast({getExp(operandExp)} as unsigned)"; case "System.UInt32": return $"cast({getExp(operandExp)} as decimal(10,0))"; case "System.UInt64": return $"cast({getExp(operandExp)} as decimal(21,0))"; case "System.Guid": return $"substr(cast({getExp(operandExp)} as character), 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 int2)"; case "System.Char": return $"substr(cast({getExp(callExp.Arguments[0])} as character), 1, 1)"; case "System.DateTime": return $"datetime({getExp(callExp.Arguments[0])})"; case "System.Decimal": return $"cast({getExp(callExp.Arguments[0])} as decimal(36,18))"; case "System.Double": return $"cast({getExp(callExp.Arguments[0])} as double)"; case "System.Int16": case "System.Int32": case "System.Int64": case "System.SByte": return $"cast({getExp(callExp.Arguments[0])} as smallint)"; case "System.Single": return $"cast({getExp(callExp.Arguments[0])} as float)"; case "System.UInt16": return $"cast({getExp(callExp.Arguments[0])} as unsigned)"; case "System.UInt32": return $"cast({getExp(callExp.Arguments[0])} as decimal(10,0))"; case "System.UInt64": return $"cast({getExp(callExp.Arguments[0])} as decimal(21,0))"; case "System.Guid": return $"substr(cast({getExp(callExp.Arguments[0])} as character), 1, 36)"; } break; case "NewGuid": break; case "Next": if (callExp.Object?.Type == typeof(Random)) return "cast(random()*1000000000 as int)"; break; case "NextDouble": if (callExp.Object?.Type == typeof(Random)) return "random()"; break; case "Random": if (callExp.Method.DeclaringType.IsNumberType()) return "random()"; break; case "ToString": if (callExp.Object != null) return callExp.Arguments.Count == 0 ? $"cast({getExp(callExp.Object)} as character)" : null; break; } 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.IsArray || typeof(IList).IsAssignableFrom(callExp.Method.DeclaringType)) { var left = objExp == null ? null : getExp(objExp); switch (callExp.Method.Name) { case "Contains": //判断 in return $"({getExp(callExp.Arguments[argIndex])}) in {left}"; } } break; case ExpressionType.NewArrayInit: var arrExp = exp as NewArrayExpression; var arrSb = new StringBuilder(); arrSb.Append("("); for (var a = 0; a < arrExp.Expressions.Count; a++) { if (a > 0) arrSb.Append(","); arrSb.Append(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 $"length({left})"; } return null; } public override string ExpressionLambdaToSqlMemberAccessDateTime(MemberExpression exp, ExpTSC tsc) { if (exp.Expression == null) { switch (exp.Member.Name) { case "Now": return "datetime(current_timestamp,'localtime')"; case "UtcNow": return "current_timestamp"; case "Today": return "date(current_timestamp,'localtime')"; case "MinValue": return "datetime('0001-01-01 00:00:00.000')"; case "MaxValue": return "datetime('9999-12-31 23:59:59.999')"; } return null; } var left = ExpressionLambdaToSql(exp.Expression, tsc); switch (exp.Member.Name) { case "Date": return $"date({left})"; case "TimeOfDay": return $"strftime('%s',{left})"; case "DayOfWeek": return $"strftime('%w',{left})"; case "Day": return $"strftime('%d',{left})"; case "DayOfYear": return $"strftime('%j',{left})"; case "Month": return $"strftime('%m',{left})"; case "Year": return $"strftime('%Y',{left})"; case "Hour": return $"strftime('%H',{left})"; case "Minute": return $"strftime('%M',{left})"; case "Second": return $"strftime('%S',{left})"; case "Millisecond": return $"(strftime('%f',{left})-strftime('%S',{left}))"; case "Ticks": return $"(strftime('%s',{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 $"floor(({left})/{60 * 60}%24)"; case "Milliseconds": return $"(cast({left} as bigint)*1000)"; case "Minutes": return $"floor(({left})/60%60)"; case "Seconds": return $"(({left})%60)"; case "Ticks": return $"(cast({left} as bigint)*10000000)"; case "TotalDays": return $"(({left})/{60 * 60 * 24})"; case "TotalHours": return $"(({left})/{60 * 60})"; case "TotalMilliseconds": return $"(cast({left} as bigint)*1000)"; case "TotalMinutes": return $"(({left})/60)"; case "TotalSeconds": return $"({left})"; } return null; } 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, "%") : $"({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 '%'||({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 $"(instr({left}, {indexOfFindStr}, {locateArgs1})-1)"; //} return $"(instr({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})"; } var trimArg1 = ""; var trimArg2 = ""; 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) { var trimChr = getExp(argsTrim01).Trim('\''); if (trimChr.Length == 1) trimArg1 += trimChr; else trimArg2 += $" || ({trimChr})"; } } if (exp.Method.Name == "Trim") left = $"trim({left}, {_common.FormatSql("{0}", trimArg1)}{trimArg2})"; if (exp.Method.Name == "TrimStart") left = $"ltrim({left}, {_common.FormatSql("{0}", trimArg1)}{trimArg2})"; if (exp.Method.Name == "TrimEnd") left = $"rtrim({left}, {_common.FormatSql("{0}", trimArg1)}{trimArg2})"; 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])})"; 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 $"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 $"(strftime('%s',{getExp(exp.Arguments[0])}) -strftime('%s',{getExp(exp.Arguments[1])}))"; case "DaysInMonth": return $"strftime('%d',date({getExp(exp.Arguments[0])}||'-01-01',{getExp(exp.Arguments[1])}||' months','-1 days'))"; 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 $"datetime({getExp(exp.Arguments[0])})"; case "ParseExact": case "TryParse": case "TryParseExact": return $"datetime({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 $"datetime({left},({args1})||' seconds')"; case "AddDays": return $"datetime({left},({args1})||' days')"; case "AddHours": return $"datetime({left},({args1})||' hours')"; case "AddMilliseconds": return $"datetime({left},(({args1})/1000)||' seconds')"; case "AddMinutes": return $"datetime({left},({args1})||' seconds')"; case "AddMonths": return $"datetime({left},({args1})||' months')"; case "AddSeconds": return $"datetime({left},({args1})||' seconds')"; case "AddTicks": return $"datetime({left},(({args1})/10000000)||' seconds')"; case "AddYears": return $"datetime({left},({args1})||' years')"; case "Subtract": switch ((exp.Arguments[0].Type.IsNullableType() ? exp.Arguments[0].Type.GenericTypeArguments.FirstOrDefault() : exp.Arguments[0].Type).FullName) { case "System.DateTime": return $"(strftime('%s',{left})-strftime('%s',{args1}))"; case "System.TimeSpan": return $"datetime({left},(({args1})*-1)||' seconds')"; } break; case "Equals": return $"({left} = {args1})"; case "CompareTo": return $"(strftime('%s',{left})-strftime('%s',{args1}))"; case "ToString": return exp.Arguments.Count == 0 ? $"strftime('%Y-%m-%d %H:%M.%f',{left})" : 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])})*{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 character)"; } } 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 int2)"; case "ToChar": return $"substr(cast({getExp(exp.Arguments[0])} as character), 1, 1)"; case "ToDateTime": return $"datetime({getExp(exp.Arguments[0])})"; case "ToDecimal": return $"cast({getExp(exp.Arguments[0])} as decimal(36,18))"; case "ToDouble": return $"cast({getExp(exp.Arguments[0])} as double)"; case "ToInt16": case "ToInt32": case "ToInt64": case "ToSByte": return $"cast({getExp(exp.Arguments[0])} as smallint)"; case "ToSingle": return $"cast({getExp(exp.Arguments[0])} as float)"; case "ToString": return $"cast({getExp(exp.Arguments[0])} as character)"; case "ToUInt16": return $"cast({getExp(exp.Arguments[0])} as unsigned)"; case "ToUInt32": return $"cast({getExp(exp.Arguments[0])} as decimal(10,0))"; case "ToUInt64": return $"cast({getExp(exp.Arguments[0])} as decimal(21,0))"; } } return null; } } }