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- 增加 DuckDB 数据库支持；
This commit is contained in:
2881099
560
Providers/FreeSql.Provider.Duckdb/DuckdbExpression.cs
Normal file
560
Providers/FreeSql.Provider.Duckdb/DuckdbExpression.cs
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@ -0,0 +1,560 @@
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using FreeSql.Internal;
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using System;
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using System.Collections;
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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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using System.Text;
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using System.Text.RegularExpressions;
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namespace FreeSql.Duckdb
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{
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class DuckdbExpression : CommonExpression
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{
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public DuckdbExpression(CommonUtils common) : base(common) { }
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public override string ExpressionLambdaToSqlOther(Expression exp, ExpTSC tsc)
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{
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Func<Expression, string> getExp = exparg => ExpressionLambdaToSql(exparg, tsc);
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switch (exp.NodeType)
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{
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case ExpressionType.ArrayLength:
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var arrOper = (exp as UnaryExpression)?.Operand;
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var arrOperExp = getExp(arrOper);
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if (arrOperExp.StartsWith("(") || arrOperExp.EndsWith(")")) return $"len([{arrOperExp.TrimStart('(').TrimEnd(')')}])";
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if (arrOper.Type == typeof(byte[])) return $"octet_length({getExp(arrOper)})";
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return $"case when {arrOperExp} is null then 0 else len({arrOperExp}) end";
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case ExpressionType.Convert:
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var operandExp = (exp as UnaryExpression)?.Operand;
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var gentype = exp.Type.NullableTypeOrThis();
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if (gentype != operandExp.Type.NullableTypeOrThis())
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{
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switch (exp.Type.NullableTypeOrThis().ToString())
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{
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case "System.Boolean": return $"({getExp(operandExp)} not in ('0','false'))";
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case "System.Byte": return $"cast({getExp(operandExp)} as utinyint)";
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case "System.Char": return $"substr(cast({getExp(operandExp)} as char), 1, 1)";
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case "System.DateTime": return ExpressionConstDateTime(operandExp) ?? $"cast({getExp(operandExp)} as timestamp)";
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case "System.Decimal": return $"cast({getExp(operandExp)} as decimal(36,18))";
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case "System.Double": return $"cast({getExp(operandExp)} as double)";
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case "System.Int16": return $"cast({getExp(operandExp)} as smallint)";
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case "System.Int32": return $"cast({getExp(operandExp)} as integer)";
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case "System.Int64": return $"cast({getExp(operandExp)} as bigint)";
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case "System.SByte": return $"cast({getExp(operandExp)} as tinyint)";
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case "System.Single": return $"cast({getExp(operandExp)} as float)";
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case "System.String": return $"cast({getExp(operandExp)} as text)";
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case "System.UInt16": return $"cast({getExp(operandExp)} as usmallint)";
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case "System.UInt32": return $"cast({getExp(operandExp)} as uinteger)";
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case "System.UInt64": return $"cast({getExp(operandExp)} as ubigint)";
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case "System.Guid": return $"cast({getExp(operandExp)} as uuid)";
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}
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}
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break;
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case ExpressionType.Call:
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var callExp = exp as MethodCallExpression;
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switch (callExp.Method.Name)
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{
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case "Parse":
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case "TryParse":
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switch (callExp.Method.DeclaringType.NullableTypeOrThis().ToString())
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{
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case "System.Boolean": return $"({getExp(callExp.Arguments[0])} not in ('0','false'))";
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case "System.Byte": return $"cast({getExp(callExp.Arguments[0])} as utinyint)";
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case "System.Char": return $"substr(cast({getExp(callExp.Arguments[0])} as char), 1, 1)";
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case "System.DateTime": return ExpressionConstDateTime(callExp.Arguments[0]) ?? $"cast({getExp(callExp.Arguments[0])} as timestamp)";
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case "System.Decimal": return $"cast({getExp(callExp.Arguments[0])} as decimal(36,18))";
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case "System.Double": return $"cast({getExp(callExp.Arguments[0])} as double)";
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case "System.Int16": return $"cast({getExp(callExp.Arguments[0])} as smallint)";
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case "System.Int32": return $"cast({getExp(callExp.Arguments[0])} as integer)";
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case "System.Int64": return $"cast({getExp(callExp.Arguments[0])} as bigint)";
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case "System.SByte": return $"cast({getExp(callExp.Arguments[0])} as tinyint)";
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case "System.Single": return $"cast({getExp(callExp.Arguments[0])} as float)";
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case "System.UInt16": return $"cast({getExp(callExp.Arguments[0])} as usmallint)";
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case "System.UInt32": return $"cast({getExp(callExp.Arguments[0])} as uinteger)";
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case "System.UInt64": return $"cast({getExp(callExp.Arguments[0])} as ubigint)";
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case "System.Guid": return $"cast({getExp(callExp.Arguments[0])} as uuid)";
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}
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return null;
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case "NewGuid":
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return null;
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case "Next":
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if (callExp.Object?.Type == typeof(Random)) return "cast(random()*1000000000 as int)";
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return null;
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case "NextDouble":
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if (callExp.Object?.Type == typeof(Random)) return "random()";
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return null;
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case "Random":
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if (callExp.Method.DeclaringType.IsNumberType()) return "random()";
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return null;
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case "ToString":
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if (callExp.Object != null)
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{
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if (callExp.Object.Type.NullableTypeOrThis().IsEnum)
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{
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tsc.SetMapColumnTmp(null);
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var oldMapType = tsc.SetMapTypeReturnOld(typeof(string));
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var enumStr = ExpressionLambdaToSql(callExp.Object, tsc);
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tsc.SetMapColumnTmp(null).SetMapTypeReturnOld(oldMapType);
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return enumStr;
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}
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var value = ExpressionGetValue(callExp.Object, out var success);
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if (success) return formatSql(value, typeof(string), null, null);
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return callExp.Arguments.Count == 0 ? $"({getExp(callExp.Object)})::text" : null;
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}
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return null;
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}
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var objExp = callExp.Object;
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var objType = objExp?.Type;
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if (objType?.FullName == "System.Byte[]") return null;
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var argIndex = 0;
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if (objType == null && callExp.Method.DeclaringType == typeof(Enumerable))
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{
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objExp = callExp.Arguments.FirstOrDefault();
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objType = objExp?.Type;
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argIndex++;
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if (objType == typeof(string))
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{
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switch (callExp.Method.Name)
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{
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case "First":
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case "FirstOrDefault":
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return $"substring({getExp(callExp.Arguments[0])}, 1, 1)";
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}
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}
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}
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if (objType == null) objType = callExp.Method.DeclaringType;
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if (objType != null || objType.IsArrayOrList())
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{
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string left = null;
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switch (callExp.Method.Name)
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{
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case "Any":
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left = objExp == null ? null : getExp(objExp);
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if (left.StartsWith("(") || left.EndsWith(")")) left = $"[{left.TrimStart('(').TrimEnd(')')}]";
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return $"(case when {left} is null then 0 else len({left}) end > 0)";
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case "Contains":
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tsc.SetMapColumnTmp(null);
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var args1 = getExp(callExp.Arguments[argIndex]);
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var oldMapType = tsc.SetMapTypeReturnOld(tsc.mapTypeTmp);
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var oldDbParams = objExp?.NodeType == ExpressionType.MemberAccess ? tsc.SetDbParamsReturnOld(null) : null; //#900 UseGenerateCommandParameterWithLambda(true) 子查询 bug、以及 #1173 参数化 bug
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tsc.isNotSetMapColumnTmp = true;
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left = objExp == null ? null : getExp(objExp);
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tsc.isNotSetMapColumnTmp = false;
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tsc.SetMapColumnTmp(null).SetMapTypeReturnOld(oldMapType);
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if (oldDbParams != null) tsc.SetDbParamsReturnOld(oldDbParams);
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//判断 in 或 array @> array
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if (left.StartsWith("[") && left.EndsWith("]"))
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return $"({args1}) in ({left.TrimStart('[').TrimEnd(']')})";
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if (left.StartsWith("(") && left.EndsWith(")")) //在各大 Provider AdoProvider 中已约定，500元素分割, 3空格\r\n4空格
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return $"(({args1}) in {left.Replace(", \r\n \r\n", $") \r\n OR ({args1}) in (")})";
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return $"list_contains({left}, {args1})";
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case "Concat":
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left = objExp == null ? null : getExp(objExp);
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if (left.StartsWith("(") || left.EndsWith(")")) left = $"[{left.TrimStart('(').TrimEnd(')')}]";
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var right2 = getExp(callExp.Arguments[argIndex]);
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if (right2.StartsWith("(") || right2.EndsWith(")")) right2 = $"[{right2.TrimStart('(').TrimEnd(')')}]";
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return $"list_concat({left}, {right2})";
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case "GetLength":
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case "GetLongLength":
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case "Length":
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case "Count":
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left = objExp == null ? null : getExp(objExp);
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if (left.StartsWith("(") || left.EndsWith(")")) left = $"[{left.TrimStart('(').TrimEnd(')')}]";
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return $"case when {left} is null then 0 else len({left}) end";
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}
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}
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break;
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case ExpressionType.MemberAccess:
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var memExp = exp as MemberExpression;
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var memParentExp = memExp.Expression?.Type;
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if (memParentExp?.FullName == "System.Byte[]") return null;
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if (memParentExp != null)
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{
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if (memParentExp.IsArrayOrList())
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{
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var left = getExp(memExp.Expression);
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if (left.StartsWith("(") || left.EndsWith(")")) left = $"[{left.TrimStart('(').TrimEnd(')')}]";
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switch (memExp.Member.Name)
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{
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case "Length":
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case "Count": return $"case when {left} is null then 0 else len({left}) end";
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}
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}
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}
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break;
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case ExpressionType.NewArrayInit:
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var arrExp = exp as NewArrayExpression;
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var arrSb = new StringBuilder();
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arrSb.Append("[");
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for (var a = 0; a < arrExp.Expressions.Count; a++)
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{
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if (a > 0) arrSb.Append(",");
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arrSb.Append(getExp(arrExp.Expressions[a]));
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}
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if (arrSb.Length == 1) arrSb.Append("NULL");
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return arrSb.Append("]").ToString();
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case ExpressionType.ListInit:
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var listExp = exp as ListInitExpression;
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var listSb = new StringBuilder();
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listSb.Append("(");
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for (var a = 0; a < listExp.Initializers.Count; a++)
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{
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if (listExp.Initializers[a].Arguments.Any() == false) continue;
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if (a > 0) listSb.Append(",");
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listSb.Append(getExp(listExp.Initializers[a].Arguments.FirstOrDefault()));
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}
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if (listSb.Length == 1) listSb.Append("NULL");
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return listSb.Append(")").ToString();
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case ExpressionType.New:
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var newExp = exp as NewExpression;
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if (typeof(IList).IsAssignableFrom(newExp.Type))
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{
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if (newExp.Arguments.Count == 0) return "(NULL)";
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if (typeof(IEnumerable).IsAssignableFrom(newExp.Arguments[0].Type) == false) return "(NULL)";
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return getExp(newExp.Arguments[0]);
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}
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return null;
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}
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return null;
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}
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public override string ExpressionLambdaToSqlMemberAccessString(MemberExpression exp, ExpTSC tsc)
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{
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if (exp.Expression == null)
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{
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switch (exp.Member.Name)
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{
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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, tsc);
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switch (exp.Member.Name)
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{
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case "Length": return $"length({left})";
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}
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return null;
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}
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public override string ExpressionLambdaToSqlMemberAccessDateTime(MemberExpression exp, ExpTSC tsc)
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{
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if (exp.Expression == null)
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{
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switch (exp.Member.Name)
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{
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case "Now": return _common.Now;
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case "UtcNow": return _common.NowUtc;
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case "Today": return "current_date";
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case "MinValue": return "timestamp '0001-01-01 00:00:00.000'";
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case "MaxValue": return "timestamp '9999-12-31 23:59:59.999'";
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}
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return null;
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}
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var left = ExpressionLambdaToSql(exp.Expression, tsc);
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switch (exp.Member.Name)
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{
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case "Date": return $"({left})::date";
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case "TimeOfDay": return $"strftime({left},'%H:%M:%S')::time";
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case "DayOfWeek": return $"dayofweek({left})";
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case "Day": return $"day({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 $"millisecond({left})";
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}
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return null;
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}
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public override string ExpressionLambdaToSqlCallString(MethodCallExpression exp, ExpTSC tsc)
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{
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Func<Expression, string> getExp = exparg => ExpressionLambdaToSql(exparg, tsc);
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if (exp.Object == null)
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{
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switch (exp.Method.Name)
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{
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case "IsNullOrEmpty":
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var arg1 = getExp(exp.Arguments[0]);
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return $"({arg1} is null or {arg1} = '')";
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case "IsNullOrWhiteSpace":
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var arg2 = getExp(exp.Arguments[0]);
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return $"({arg2} is null or {arg2} = '' or ltrim({arg2}) = '')";
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case "Concat":
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if (exp.Arguments.Count == 1 && exp.Arguments[0].NodeType == ExpressionType.NewArrayInit && exp.Arguments[0] is NewArrayExpression concatNewArrExp)
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return _common.StringConcat(concatNewArrExp.Expressions.Select(a => getExp(a)).ToArray(), null);
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return _common.StringConcat(exp.Arguments.Select(a => getExp(a)).ToArray(), null);
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case "Format":
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if (exp.Arguments[0].NodeType != ExpressionType.Constant) throw new Exception(CoreStrings.Not_Implemented_Expression_ParameterUseConstant(exp, exp.Arguments[0]));
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var expArgsHack = exp.Arguments.Count == 2 && exp.Arguments[1].NodeType == ExpressionType.NewArrayInit ?
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(exp.Arguments[1] as NewArrayExpression).Expressions : exp.Arguments.Where((a, z) => z > 0);
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//3个 {} 时，Arguments 解析出来是分开的
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//4个 {} 时，Arguments[1] 只能解析这个出来，然后里面是 NewArray []
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var expArgs = expArgsHack.Select(a =>
|
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{
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var atype = (a as UnaryExpression)?.Operand.Type.NullableTypeOrThis() ?? a.Type.NullableTypeOrThis();
|
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if (atype == typeof(string)) return $"'||{_common.IsNull(ExpressionLambdaToSql(a, tsc), "''")}||'";
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return $"'||{_common.IsNull($"({ExpressionLambdaToSql(a, tsc)})::text", "''")}||'";
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}).ToArray();
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return string.Format(ExpressionLambdaToSql(exp.Arguments[0], tsc), expArgs);
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case "Join":
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if (exp.IsStringJoin(out var tolistObjectExp, out var toListMethod, out var toListArgs1))
|
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{
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var newToListArgs0 = Expression.Call(tolistObjectExp, toListMethod,
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Expression.Lambda(
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Expression.Call(
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typeof(SqlExtExtensions).GetMethod("StringJoinPgsqlGroupConcat"),
|
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Expression.Convert(toListArgs1.Body, typeof(object)),
|
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Expression.Convert(exp.Arguments[0], typeof(object))),
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toListArgs1.Parameters));
|
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var newToListSql = getExp(newToListArgs0);
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return newToListSql;
|
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}
|
||||
break;
|
||||
}
|
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}
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else
|
||||
{
|
||||
var left = getExp(exp.Object);
|
||||
switch (exp.Method.Name)
|
||||
{
|
||||
case "StartsWith":
|
||||
case "EndsWith":
|
||||
case "Contains":
|
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var leftLike = exp.Object.NodeType == ExpressionType.MemberAccess ? left : $"({left})";
|
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var args0Value = getExp(exp.Arguments[0]);
|
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if (args0Value == "NULL") return $"{leftLike} IS NULL";
|
||||
if (exp.Method.Name == "StartsWith") return $"{left} ^@ ({args0Value})";
|
||||
if (args0Value.Contains("%"))
|
||||
{
|
||||
if (exp.Method.Name == "EndsWith") return $"strpos({left}, {args0Value}) = length({left})-length({args0Value})+1";
|
||||
return $"strpos({left}, {args0Value}) > 0";
|
||||
}
|
||||
if (exp.Method.Name == "EndsWith") return $"{leftLike} LIKE {(args0Value.StartsWith("'") ? args0Value.Insert(1, "%") : $"('%' || ({args0Value})::text)")}";
|
||||
if (args0Value.StartsWith("'") && args0Value.EndsWith("'")) return $"{leftLike} LIKE {args0Value.Insert(1, "%").Insert(args0Value.Length, "%")}";
|
||||
return $"{leftLike} LIKE ('%' || ({args0Value})::text || '%')";
|
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case "ToLower": return $"lower({left})";
|
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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}, {substrArgs1})";
|
||||
return $"substring({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 $"(strpos({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<Expression, string> 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])}, 2)";
|
||||
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 $"trunc({getExp(exp.Arguments[0])})";
|
||||
}
|
||||
return null;
|
||||
}
|
||||
public override string ExpressionLambdaToSqlCallDateTime(MethodCallExpression exp, ExpTSC tsc)
|
||||
{
|
||||
Func<Expression, string> getExp = exparg => ExpressionLambdaToSql(exparg, tsc);
|
||||
if (exp.Object == null)
|
||||
{
|
||||
switch (exp.Method.Name)
|
||||
{
|
||||
case "Compare": return $"(epoch({getExp(exp.Arguments[0])})-epoch({getExp(exp.Arguments[1])}))";
|
||||
case "DaysInMonth": return $"day(last_day(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 $"(({isLeapYearArgs1})%4=0 AND ({isLeapYearArgs1})%100<>0 OR ({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 "AddDays": return $"date_add({left},cast(({args1})||' days' as interval))";
|
||||
case "AddHours": return $"date_add({left},cast(({args1})||' hours' as interval))";
|
||||
case "AddMilliseconds": return $"date_add({left},cast(({args1})||' milliseconds' as interval))";
|
||||
case "AddMinutes": return $"date_add({left},cast(({args1})||' minutes' as interval))";
|
||||
case "AddMonths": return $"date_add({left},cast(({args1})||' months' as interval))";
|
||||
case "AddSeconds": return $"date_add({left},cast(({args1})||' seconds' as interval))";
|
||||
case "AddTicks": return $"date_add({left},cast((({args1})/10)||' microseconds' as interval))";
|
||||
case "AddYears": return $"date_add({left},cast(({args1})||' years' as interval))";
|
||||
case "Subtract":
|
||||
switch ((exp.Arguments[0].Type.IsNullableType() ? exp.Arguments[0].Type.GetGenericArguments().FirstOrDefault() : exp.Arguments[0].Type).FullName)
|
||||
{
|
||||
case "System.DateTime": return $"cast((epoch({left})-epoch({args1}))||' seconds' as interval)";
|
||||
case "System.TimeSpan": return $"date_add({left},{args1})";
|
||||
}
|
||||
break;
|
||||
case "Equals": return $"({left} = {args1})";
|
||||
case "CompareTo": return $"(epoch({left})-epoch({args1}))";
|
||||
case "ToString":
|
||||
if (exp.Arguments.Count == 0) return $"strftime({left},'%Y-%m-%d %H:%M:%S')";
|
||||
switch (args1)
|
||||
{
|
||||
case "'yyyy-MM-dd HH:mm:ss'": return $"strftime({left},'%Y-%m-%d %H:%M:%S')";
|
||||
case "'yyyy-MM-dd HH:mm'": return $"strftime({left},'%Y-%m-%d %H:%M')";
|
||||
case "'yyyy-MM-dd HH'": return $"strftime({left},'%Y-%m-%d %H')";
|
||||
case "'yyyy-MM-dd'": return $"strftime({left},'%Y-%m-%d')";
|
||||
case "'yyyy-MM'": return $"strftime({left},'%Y-%m')";
|
||||
case "'yyyyMMddHHmmss'": return $"strftime({left},'%Y%m%d%H%M%S')";
|
||||
case "'yyyyMMddHHmm'": return $"strftime({left},'%Y%m%d%H%M')";
|
||||
case "'yyyyMMddHH'": return $"strftime({left},'%Y%m%d%H')";
|
||||
case "'yyyyMMdd'": return $"strftime({left},'%Y%m%d')";
|
||||
case "'yyyyMM'": return $"strftime({left},'%Y%m')";
|
||||
case "'yyyy'": return $"strftime({left},'%Y')";
|
||||
case "'HH:mm:ss'": return $"strftime({left},'%H:%M:%S')";
|
||||
}
|
||||
args1 = Regex.Replace(args1, "(yyyy|MM|dd|HH|mm|ss)", m =>
|
||||
{
|
||||
switch (m.Groups[1].Value)
|
||||
{
|
||||
case "yyyy": return $"%Y";
|
||||
case "MM": return $"%_a1";
|
||||
case "dd": return $"%_a2";
|
||||
case "HH": return $"%_a3";
|
||||
case "mm": return $"%_a4";
|
||||
case "ss": return $"%S";
|
||||
}
|
||||
return m.Groups[0].Value;
|
||||
});
|
||||
var argsFinds = new[] { "%Y", "%_a1", "%_a2", "%_a3", "%_a4", "%S" };
|
||||
var argsSpts = Regex.Split(args1, "(yy|M|d|H|hh|h|m|s|tt|t)");
|
||||
for (var a = 0; a < argsSpts.Length; a++)
|
||||
{
|
||||
switch (argsSpts[a])
|
||||
{
|
||||
case "yy": argsSpts[a] = $"substr(strftime({left},'%Y'),3,2)"; break;
|
||||
case "M": argsSpts[a] = $"strftime({left},'%-m')"; break;
|
||||
case "d": argsSpts[a] = $"strftime({left},'%-d')"; break;
|
||||
case "H": argsSpts[a] = $"strftime({left},'%-H')"; break;
|
||||
case "hh": argsSpts[a] = $"strftime({left},'%I')"; break;
|
||||
case "h": argsSpts[a] = $"strftime({left},'%-I')"; break;
|
||||
case "m": argsSpts[a] = $"strftime({left},'%-M')"; break;
|
||||
case "s": argsSpts[a] = $"strftime({left},'%-S')"; break;
|
||||
case "tt": argsSpts[a] = $"strftime({left},'%p')"; break;
|
||||
case "t": argsSpts[a] = $"substr(strftime({left},'%p'),1,1)"; 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)) ? $"strftime({left},'{argsSptsA}')" : $"'{argsSptsA}'";
|
||||
break;
|
||||
}
|
||||
}
|
||||
if (argsSpts.Length > 0) args1 = $"({string.Join(" || ", argsSpts.Where(a => a != "''"))})";
|
||||
return args1.Replace("%_a1", "%m").Replace("%_a2", "%d").Replace("%_a3", "%H").Replace("%_a4", "%M");
|
||||
}
|
||||
}
|
||||
return null;
|
||||
}
|
||||
public override string ExpressionLambdaToSqlCallConvert(MethodCallExpression exp, ExpTSC tsc)
|
||||
{
|
||||
Func<Expression, string> 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 utinyint)";
|
||||
case "ToChar": return $"substr(cast({getExp(exp.Arguments[0])} as char), 1, 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(36,18))";
|
||||
case "ToDouble": return $"cast({getExp(exp.Arguments[0])} as double)";
|
||||
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 tinyint)";
|
||||
case "ToSingle": return $"cast({getExp(exp.Arguments[0])} as float)";
|
||||
case "ToString": return $"cast({getExp(exp.Arguments[0])} as text)";
|
||||
case "ToUInt16": return $"cast({getExp(exp.Arguments[0])} as usmallint)";
|
||||
case "ToUInt32": return $"cast({getExp(exp.Arguments[0])} as uinteger)";
|
||||
case "ToUInt64": return $"cast({getExp(exp.Arguments[0])} as ubigint)";
|
||||
}
|
||||
}
|
||||
return null;
|
||||
}
|
||||
}
|
||||
}
|
||||
Reference in New Issue
Block a user