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574 lines
37 KiB
C#
574 lines
37 KiB
C#
using FreeSql.Internal;
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using System;
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using System.Collections;
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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.Custom.SqlServer
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{
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class CustomSqlServerExpression : CommonExpression
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{
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public CustomSqlServerExpression(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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if (arrOper.Type == typeof(byte[])) return $"datalength({getExp(arrOper)})";
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break;
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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 (gentype.ToString())
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{
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case "System.Boolean": return $"(cast({getExp(operandExp)} as varchar) not in ('0','false'))";
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case "System.Byte": return $"cast({getExp(operandExp)} as tinyint)";
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case "System.Char": return $"substring(cast({getExp(operandExp)} as nvarchar),1,1)";
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case "System.DateTime": return ExpressionConstDateTime(operandExp) ?? $"cast({getExp(operandExp)} as datetime)";
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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 decimal(32,16))";
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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 int)";
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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 $"cast({getExp(operandExp)} as decimal(14,7))";
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case "System.String":
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return gentype == typeof(Guid) ?
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$"cast({getExp(operandExp)} as varchar(36))" :
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$"cast({getExp(operandExp)} as nvarchar{(gentype.IsNumberType() || gentype.IsEnum ? "(100)" : "(max)")})";
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case "System.UInt16": return $"cast({getExp(operandExp)} as smallint)";
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case "System.UInt32": return $"cast({getExp(operandExp)} as int)";
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case "System.UInt64": return $"cast({getExp(operandExp)} as bigint)";
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case "System.Guid": return $"cast({getExp(operandExp)} as uniqueidentifier)";
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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 $"(cast({getExp(callExp.Arguments[0])} as varchar) not in ('0','false'))";
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case "System.Byte": return $"cast({getExp(callExp.Arguments[0])} as tinyint)";
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case "System.Char": return $"substring(cast({getExp(callExp.Arguments[0])} as nvarchar),1,1)";
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case "System.DateTime": return ExpressionConstDateTime(callExp.Arguments[0]) ?? $"cast({getExp(callExp.Arguments[0])} as datetime)";
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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 decimal(32,16))";
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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 int)";
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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 decimal(14,7))";
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case "System.UInt16": return $"cast({getExp(callExp.Arguments[0])} as smallint)";
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case "System.UInt32": return $"cast({getExp(callExp.Arguments[0])} as int)";
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case "System.UInt64": return $"cast({getExp(callExp.Arguments[0])} as bigint)";
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case "System.Guid": return $"cast({getExp(callExp.Arguments[0])} as uniqueidentifier)";
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}
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return null;
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case "NewGuid":
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switch (callExp.Method.DeclaringType.NullableTypeOrThis().ToString())
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{
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case "System.Guid": return $"newid()";
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}
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return null;
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case "Next":
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if (callExp.Object?.Type == typeof(Random)) return "cast(rand()*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 "rand()";
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return null;
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case "Random":
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if (callExp.Method.DeclaringType.IsNumberType()) return "rand()";
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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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var gentype2 = callExp.Object.Type.NullableTypeOrThis();
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if (gentype2.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 ? (gentype2 == typeof(Guid) ?
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$"cast({getExp(callExp.Object)} as varchar(36))" :
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$"cast({getExp(callExp.Object)} as nvarchar{(gentype2.IsNumberType() || gentype2.IsEnum ? "(100)" : "(max)")})") : 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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if (argIndex >= callExp.Arguments.Count) break;
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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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var 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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switch (callExp.Method.Name)
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{
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case "Contains":
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//判断 in //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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}
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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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if (a % 500 == 499) arrSb.Append(" \r\n \r\n"); //500元素分割, 3空格\r\n4空格
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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 $"len({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 "convert(char(10),getdate(),120)";
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case "MinValue": return "'1753/1/1 0:00:00'";
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case "MaxValue": return "'9999/12/31 23:59:59'";
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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 $"convert(char(10),{left},120)";
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case "TimeOfDay": return $"datediff(second, convert(char(10),{left},120), {left})";
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case "DayOfWeek": return $"(datepart(weekday, {left})-1)";
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case "Day": return $"datepart(day, {left})";
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case "DayOfYear": return $"datepart(dayofyear, {left})";
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case "Month": return $"datepart(month, {left})";
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case "Year": return $"datepart(year, {left})";
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case "Hour": return $"datepart(hour, {left})";
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case "Minute": return $"datepart(minute, {left})";
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case "Second": return $"datepart(second, {left})";
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case "Millisecond": return $"(datepart(millisecond, {left})/1000)";
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case "Ticks": return $"(cast(datediff(second, '1970-1-1', {left}) as bigint)*10000000+621355968000000000)";
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}
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return null;
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}
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public override string ExpressionLambdaToSqlMemberAccessTimeSpan(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 "Zero": return "0";
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case "MinValue": return "-922337203685477580"; //微秒 Ticks / 10
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case "MaxValue": return "922337203685477580";
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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 "Days": return $"floor(({left})/{60 * 60 * 24})";
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case "Hours": return $"floor(({left})/{60 * 60}%24)";
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case "Milliseconds": return $"(cast({left} as bigint)*1000)";
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case "Minutes": return $"floor(({left})/60%60)";
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case "Seconds": return $"(({left})%60)";
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case "Ticks": return $"(cast({left} as bigint)*10000000)";
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case "TotalDays": return $"(({left})/{60 * 60 * 24})";
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case "TotalHours": return $"(({left})/{60 * 60})";
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case "TotalMilliseconds": return $"(cast({left} as bigint)*1000)";
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case "TotalMinutes": return $"(({left})/60)";
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case "TotalSeconds": return $"({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(), concatNewArrExp.Expressions.Select(a => a.Type).ToArray());
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return _common.StringConcat(exp.Arguments.Select(a => getExp(a)).ToArray(), exp.Arguments.Select(a => a.Type).ToArray());
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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 expArgs0 = ExpressionLambdaToSql(exp.Arguments[0], tsc);
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if (exp.Arguments.Count == 1) return expArgs0;
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var nchar = expArgs0.StartsWith("N'") ? "N" : "";
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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), "''")}+{nchar}'";
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if (atype == typeof(Guid)) return $"'+{_common.IsNull($"cast({ExpressionLambdaToSql(a, tsc)} as char(36))", "''")}+{nchar}'";
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if (atype.IsNumberType()) return $"'+{_common.IsNull($"cast({ExpressionLambdaToSql(a, tsc)} as varchar)", "''")}+{nchar}'";
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return $"'+{_common.IsNull($"cast({ExpressionLambdaToSql(a, tsc)} as nvarchar(max))", "''")}+{nchar}'";
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}).ToArray();
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return string.Format(expArgs0, 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(string).GetMethod("Concat", new[] { typeof(object), typeof(object) }),
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Expression.Convert(exp.Arguments[0], typeof(object)),
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Expression.Convert(toListArgs1.Body, typeof(object))),
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toListArgs1.Parameters));
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var newToListSql = getExp(newToListArgs0);
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if (string.IsNullOrEmpty(newToListSql) == false && newToListSql.StartsWith("(") && newToListSql.EndsWith(")"))
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{
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newToListSql = $"stuff({newToListSql.Substring(0, newToListSql.Length - 1)} FOR XML PATH('')),1,len({getExp(exp.Arguments[0])}),'')";
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return newToListSql;
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}
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}
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break;
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}
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}
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else
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{
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var left = getExp(exp.Object);
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switch (exp.Method.Name)
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{
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case "StartsWith":
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case "EndsWith":
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case "Contains":
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var args0Value = getExp(exp.Arguments[0]);
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if (args0Value == "NULL") return $"({left}) IS NULL";
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if (args0Value.Contains("%"))
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{
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if (exp.Method.Name == "StartsWith") return $"charindex({args0Value}, {left}) = 1";
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if (exp.Method.Name == "EndsWith") return $"charindex({args0Value}, {left}) = len({left})-len({args0Value})+1";
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return $"charindex({args0Value}, {left}) > 0";
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}
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if (exp.Method.Name == "StartsWith") return $"({left}) LIKE {(args0Value.EndsWith("'") ? args0Value.Insert(args0Value.Length - 1, "%") : $"(cast({args0Value} as nvarchar(max))+'%')")}";
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if (exp.Method.Name == "EndsWith") return $"({left}) LIKE {(args0Value.StartsWith("'") ? args0Value.Insert(1, "%") : $"('%'+cast({args0Value} as nvarchar(max)))")}";
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if (args0Value.StartsWith("'") && args0Value.EndsWith("'")) return $"({left}) LIKE {args0Value.Insert(1, "%").Insert(args0Value.Length, "%")}";
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return $"({left}) LIKE ('%'+cast({args0Value} as nvarchar(max))+'%')";
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case "ToLower": return $"lower({left})";
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case "ToUpper": return $"upper({left})";
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case "Substring":
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var substrArgs1 = getExp(exp.Arguments[0]);
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if (long.TryParse(substrArgs1, out var testtrylng1)) substrArgs1 = (testtrylng1 + 1).ToString();
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else substrArgs1 += "+1";
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if (exp.Arguments.Count == 1) return $"left({left}, {substrArgs1})";
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return $"substring({left}, {substrArgs1}, {getExp(exp.Arguments[1])})";
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case "IndexOf":
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var indexOfFindStr = getExp(exp.Arguments[0]);
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if (exp.Arguments.Count > 1 && exp.Arguments[1].Type.FullName == "System.Int32")
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{
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var locateArgs1 = getExp(exp.Arguments[1]);
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if (long.TryParse(locateArgs1, out var testtrylng2)) locateArgs1 = (testtrylng2 + 1).ToString();
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else locateArgs1 += "+1";
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return $"(charindex({indexOfFindStr}, {left}, {locateArgs1})-1)";
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}
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return $"(charindex({indexOfFindStr}, {left})-1)";
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case "PadLeft":
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if (exp.Arguments.Count == 1) return $"lpad({left}, {getExp(exp.Arguments[0])})";
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return $"lpad({left}, {getExp(exp.Arguments[0])}, {getExp(exp.Arguments[1])})";
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case "PadRight":
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if (exp.Arguments.Count == 1) return $"rpad({left}, {getExp(exp.Arguments[0])})";
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return $"rpad({left}, {getExp(exp.Arguments[0])}, {getExp(exp.Arguments[1])})";
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case "Trim": return $"ltrim(rtrim({left}))";
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case "TrimStart": return $"ltrim({left})";
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case "TrimEnd": return $"rtrim({left})";
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case "Replace": return $"replace({left}, {getExp(exp.Arguments[0])}, {getExp(exp.Arguments[1])})";
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case "CompareTo": return $"({left} - {getExp(exp.Arguments[0])})";
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||
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])}, 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 $"floor({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 $"({getExp(exp.Arguments[0])} - ({getExp(exp.Arguments[1])}))";
|
||
case "DaysInMonth": return $"datepart(day, dateadd(day, -1, dateadd(month, 1, cast({getExp(exp.Arguments[0])} as varchar(100)) + '-' + cast({getExp(exp.Arguments[1])} as varchar(100)) + '-1')))";
|
||
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 datetime)";
|
||
case "ParseExact":
|
||
case "TryParse":
|
||
case "TryParseExact": return ExpressionConstDateTime(exp.Arguments[0]) ?? $"cast({getExp(exp.Arguments[0])} as datetime)";
|
||
}
|
||
}
|
||
else
|
||
{
|
||
var left = getExp(exp.Object);
|
||
var args1 = exp.Arguments.Count == 0 ? null : getExp(exp.Arguments[0]);
|
||
switch (exp.Method.Name)
|
||
{
|
||
case "Add": return $"dateadd(second, {args1}, {left})";
|
||
case "AddDays": return $"dateadd(day, {args1}, {left})";
|
||
case "AddHours": return $"dateadd(hour, {args1}, {left})";
|
||
case "AddMilliseconds": return $"dateadd(second, ({args1})/1000, {left})";
|
||
case "AddMinutes": return $"dateadd(minute, {args1}, {left})";
|
||
case "AddMonths": return $"dateadd(month, {args1}, {left})";
|
||
case "AddSeconds": return $"dateadd(second, {args1}, {left})";
|
||
case "AddTicks": return $"dateadd(second, ({args1})/10000000, {left})";
|
||
case "AddYears": return $"dateadd(year, {args1}, {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, {args1}, {left})";
|
||
case "System.TimeSpan": return $"dateadd(second, ({args1})*-1, {left})";
|
||
}
|
||
break;
|
||
case "Equals": return $"({left} = {args1})";
|
||
case "CompareTo": return $"datediff(second,{args1},{left})";
|
||
case "ToString":
|
||
if (left.EndsWith(" as datetime)") == false) left = $"cast({left} as datetime)";
|
||
if (exp.Arguments.Count == 0) return $"convert(varchar, {left}, 121)";
|
||
switch (args1.TrimStart('N'))
|
||
{
|
||
case "'yyyy-MM-dd HH:mm:ss'": return $"convert(char(19), {left}, 120)";
|
||
case "'yyyy-MM-dd HH:mm'": return $"substring(convert(char(19), {left}, 120), 1, 16)";
|
||
case "'yyyy-MM-dd HH'": return $"substring(convert(char(19), {left}, 120), 1, 13)";
|
||
case "'yyyy-MM-dd'": return $"convert(char(10), {left}, 23)";
|
||
case "'yyyy-MM'": return $"substring(convert(char(10), {left}, 23), 1, 7)";
|
||
case "'yyyyMMdd'": return $"convert(char(8), {left}, 112)";
|
||
case "'yyyyMM'": return $"substring(convert(char(8), {left}, 112), 1, 6)";
|
||
case "'yyyy'": return $"substring(convert(char(8), {left}, 112), 1, 4)";
|
||
case "'HH:mm:ss'": return $"convert(char(8), {left}, 24)";
|
||
}
|
||
var isMatched = false;
|
||
var nchar = args1.StartsWith("N'") ? "N" : "";
|
||
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 $"' + substring(convert(char(8), {left}, 112), 1, 4) + {nchar}'";
|
||
case "yy": return $"' + substring(convert(char(6), {left}, 12), 1, 2) + {nchar}'";
|
||
case "MM": return $"' + substring(convert(char(6), {left}, 12), 3, 2) + {nchar}'";
|
||
case "M": return $"' + case when substring(convert(char(6), {left}, 12), 3, 1) = '0' then substring(convert(char(6), {left}, 12), 4, 1) else substring(convert(char(6), {left}, 12), 3, 2) end + {nchar}'";
|
||
case "dd": return $"' + substring(convert(char(6), {left}, 12), 5, 2) + {nchar}'";
|
||
case "d": return $"' + case when substring(convert(char(6), {left}, 12), 5, 1) = '0' then substring(convert(char(6), {left}, 12), 6, 1) else substring(convert(char(6), {left}, 12), 5, 2) end + {nchar}'";
|
||
case "HH": return $"' + substring(convert(char(8), {left}, 24), 1, 2) + {nchar}'";
|
||
case "H": return $"' + case when substring(convert(char(8), {left}, 24), 1, 1) = '0' then substring(convert(char(8), {left}, 24), 2, 1) else substring(convert(char(8), {left}, 24), 1, 2) end + {nchar}'";
|
||
case "hh":
|
||
return $"' + case cast(case when substring(convert(char(8), {left}, 24), 1, 1) = '0' then substring(convert(char(8), {left}, 24), 2, 1) else substring(convert(char(8), {left}, 24), 1, 2) end as int) % 12" +
|
||
$"when 0 then '12' when 1 then '01' when 2 then '02' when 3 then '03' when 4 then '04' when 5 then '05' when 6 then '06' when 7 then '07' when 8 then '08' when 9 then '09' when 10 then '10' when 11 then '11' end + {nchar}'";
|
||
case "h":
|
||
return $"' + case cast(case when substring(convert(char(8), {left}, 24), 1, 1) = '0' then substring(convert(char(8), {left}, 24), 2, 1) else substring(convert(char(8), {left}, 24), 1, 2) end as int) % 12" +
|
||
$"when 0 then '12' when 1 then '1' when 2 then '2' when 3 then '3' when 4 then '4' when 5 then '5' when 6 then '6' when 7 then '7' when 8 then '8' when 9 then '9' when 10 then '10' when 11 then '11' end + {nchar}'";
|
||
case "mm": return $"' + substring(convert(char(8), {left}, 24), 4, 2) + {nchar}'";
|
||
case "m": return $"' + case when substring(convert(char(8), {left}, 24), 4, 1) = '0' then substring(convert(char(8), {left}, 24), 5, 1) else substring(convert(char(8), {left}, 24), 4, 2) end + {nchar}'";
|
||
case "ss": return $"' + substring(convert(char(8), {left}, 24), 7, 2) + {nchar}'";
|
||
case "s": return $"' + case when substring(convert(char(8), {left}, 24), 7, 1) = '0' then substring(convert(char(8), {left}, 24), 8, 1) else substring(convert(char(8), {left}, 24), 7, 2) end + {nchar}'";
|
||
case "tt": return $"' + case when cast(case when substring(convert(char(8), {left}, 24), 1, 1) = '0' then substring(convert(char(8), {left}, 24), 2, 1) else substring(convert(char(8), {left}, 24), 1, 2) end as int) >= 12 then 'PM' else 'AM' end + {nchar}'";
|
||
case "t": return $"' + case when cast(case when substring(convert(char(8), {left}, 24), 1, 1) = '0' then substring(convert(char(8), {left}, 24), 2, 1) else substring(convert(char(8), {left}, 24), 1, 2) end as int) >= 12 then 'P' else 'A' end + {nchar}'";
|
||
}
|
||
return m.Groups[0].Value;
|
||
});
|
||
return isMatched == false ? args1 : $"({args1})";
|
||
}
|
||
}
|
||
return null;
|
||
}
|
||
public override string ExpressionLambdaToSqlCallTimeSpan(MethodCallExpression exp, ExpTSC tsc)
|
||
{
|
||
Func<Expression, string> 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(100))";
|
||
}
|
||
}
|
||
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 $"(cast({getExp(exp.Arguments[0])} as varchar) not in ('0','false'))";
|
||
case "ToByte": return $"cast({getExp(exp.Arguments[0])} as tinyint)";
|
||
case "ToChar": return $"substring(cast({getExp(exp.Arguments[0])} as nvarchar),1,1)";
|
||
case "ToDateTime": return ExpressionConstDateTime(exp.Arguments[0]) ?? $"cast({getExp(exp.Arguments[0])} as datetime)";
|
||
case "ToDecimal": return $"cast({getExp(exp.Arguments[0])} as decimal(36,18))";
|
||
case "ToDouble": return $"cast({getExp(exp.Arguments[0])} as decimal(32,16))";
|
||
case "ToInt16": return $"cast({getExp(exp.Arguments[0])} as smallint)";
|
||
case "ToInt32": return $"cast({getExp(exp.Arguments[0])} as int)";
|
||
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 decimal(14,7))";
|
||
case "ToString":
|
||
var gentype = exp.Arguments[0].Type.NullableTypeOrThis();
|
||
return gentype == typeof(Guid) ?
|
||
$"cast({getExp(exp.Arguments[0])} as varchar(36))" :
|
||
$"cast({getExp(exp.Arguments[0])} as nvarchar{(gentype.IsNumberType() || gentype.IsEnum ? "(100)" : "(max)")})";
|
||
case "ToUInt16": return $"cast({getExp(exp.Arguments[0])} as smallint)";
|
||
case "ToUInt32": return $"cast({getExp(exp.Arguments[0])} as int)";
|
||
case "ToUInt64": return $"cast({getExp(exp.Arguments[0])} as bigint)";
|
||
}
|
||
}
|
||
return null;
|
||
}
|
||
}
|
||
}
|