mirror of
https://github.com/nsnail/FreeSql.git
synced 2025-04-15 23:42:51 +08:00
581 lines
34 KiB
C#
581 lines
34 KiB
C#
using FreeSql.Internal;
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using FreeSql.Internal.Model;
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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.MySql
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{
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class MySqlExpression : CommonExpression
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{
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public MySqlExpression(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 $"octet_length({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 $"({getExp(operandExp)} not in ('0','false'))";
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case "System.Byte": return $"cast({getExp(operandExp)} as unsigned)";
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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 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":
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case "System.Int32":
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case "System.Int64":
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case "System.SByte": return $"cast({getExp(operandExp)} as signed)";
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case "System.Single": return $"cast({getExp(operandExp)} as decimal(14,7))";
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case "System.String": return $"cast({getExp(operandExp)} as char)";
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case "System.UInt16":
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case "System.UInt32":
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case "System.UInt64": return $"cast({getExp(operandExp)} as unsigned)";
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case "System.Guid": return $"substr(cast({getExp(operandExp)} as char), 1, 36)";
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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 unsigned)";
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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 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":
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case "System.Int32":
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case "System.Int64":
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case "System.SByte": return $"cast({getExp(callExp.Arguments[0])} as signed)";
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case "System.Single": return $"cast({getExp(callExp.Arguments[0])} as decimal(14,7))";
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case "System.UInt16":
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case "System.UInt32":
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case "System.UInt64": return $"cast({getExp(callExp.Arguments[0])} as unsigned)";
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case "System.Guid": return $"substr(cast({getExp(callExp.Arguments[0])} as char), 1, 36)";
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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(rand()*1000000000 as signed)";
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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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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 ? $"cast({getExp(callExp.Object)} as char)" : 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 $"substr({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 $"char_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 "curdate()";
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case "MinValue": return "cast('0001/1/1 0:00:00' as datetime)";
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case "MaxValue": return "cast('9999/12/31 23:59:59' as datetime)";
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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 $"cast(date_format({left},'%Y-%m-%d') as datetime)";
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case "TimeOfDay": return $"timestampdiff(microsecond, date_format({left},'%Y-%m-%d'), {left})";
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case "DayOfWeek": return $"(dayofweek({left})-1)";
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case "Day": return $"dayofmonth({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 $"floor(microsecond({left})/1000)";
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case "Ticks": return $"(timestampdiff(microsecond, '0001-1-1', {left})*10)";
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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 $"(({left}) div {(long)1000000 * 60 * 60 * 24})";
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case "Hours": return $"(({left}) div {(long)1000000 * 60 * 60} mod 24)";
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case "Milliseconds": return $"(({left}) div 1000 mod 1000)";
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case "Minutes": return $"(({left}) div {(long)1000000 * 60} mod 60)";
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case "Seconds": return $"(({left}) div 1000000 mod 60)";
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case "Ticks": return $"(({left}) * 10)";
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case "TotalDays": return $"(({left}) / {(long)1000000 * 60 * 60 * 24})";
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case "TotalHours": return $"(({left}) / {(long)1000000 * 60 * 60})";
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case "TotalMilliseconds": return $"(({left}) / 1000)";
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case "TotalMinutes": return $"(({left}) / {(long)1000000 * 60})";
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case "TotalSeconds": return $"(({left}) / 1000000)";
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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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if (exp.Arguments.Count == 1) return ExpressionLambdaToSql(exp.Arguments[0], tsc);
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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 => $"',{_common.IsNull(ExpressionLambdaToSql(a, tsc), "''")},'").ToArray();
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return $"concat({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("StringJoinMySqlGroupConcat"),
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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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}
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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 $"locate({args0Value}, {left}) = 1";
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if (exp.Method.Name == "EndsWith") return $"locate({args0Value}, {left}) = char_length({left})-char_length({args0Value})+1";
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return $"locate({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, "%") : $"concat({args0Value}, '%')")}";
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if (exp.Method.Name == "EndsWith") return $"({left}) LIKE {(args0Value.StartsWith("'") ? args0Value.Insert(1, "%") : $"concat('%', {args0Value})")}";
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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 concat('%', {args0Value}, '%')";
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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 $"substr({left}, {substrArgs1})";
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return $"substr({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 $"(locate({indexOfFindStr}, {left}, {locateArgs1})-1)";
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}
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return $"(locate({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":
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case "TrimStart":
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case "TrimEnd":
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if (exp.Arguments.Count == 0)
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{
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if (exp.Method.Name == "Trim") return $"trim({left})";
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if (exp.Method.Name == "TrimStart") return $"ltrim({left})";
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if (exp.Method.Name == "TrimEnd") return $"rtrim({left})";
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}
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foreach (var argsTrim02 in exp.Arguments)
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{
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var argsTrim01s = new[] { argsTrim02 };
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if (argsTrim02.NodeType == ExpressionType.NewArrayInit)
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{
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var arritem = argsTrim02 as NewArrayExpression;
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argsTrim01s = arritem.Expressions.ToArray();
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}
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foreach (var argsTrim01 in argsTrim01s)
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{
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if (exp.Method.Name == "Trim") left = $"trim({getExp(argsTrim01)} from {left})";
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if (exp.Method.Name == "TrimStart") left = $"trim(leading {getExp(argsTrim01)} from {left})";
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if (exp.Method.Name == "TrimEnd") left = $"trim(trailing {getExp(argsTrim01)} from {left})";
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}
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}
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return 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 $"strcmp({left}, {getExp(exp.Arguments[0])})";
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case "Equals": return $"({left} = {getExp(exp.Arguments[0])})";
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}
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}
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return null;
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}
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public override string ExpressionLambdaToSqlCallMath(MethodCallExpression 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.Method.Name)
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{
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case "Abs": return $"abs({getExp(exp.Arguments[0])})";
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case "Sign": return $"sign({getExp(exp.Arguments[0])})";
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case "Floor": return $"floor({getExp(exp.Arguments[0])})";
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case "Ceiling": return $"ceiling({getExp(exp.Arguments[0])})";
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case "Round":
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if (exp.Arguments.Count > 1 && exp.Arguments[1].Type.FullName == "System.Int32") return $"round({getExp(exp.Arguments[0])}, {getExp(exp.Arguments[1])})";
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return $"round({getExp(exp.Arguments[0])})";
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case "Exp": return $"exp({getExp(exp.Arguments[0])})";
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case "Log": return $"log({getExp(exp.Arguments[0])})";
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case "Log10": return $"log10({getExp(exp.Arguments[0])})";
|
||
case "Pow": return $"pow({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<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 $"dayofmonth(last_day(concat({getExp(exp.Arguments[0])}, '-', {getExp(exp.Arguments[1])}, '-01')))";
|
||
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 $"date_add({left}, interval ({args1}) microsecond)";
|
||
case "AddDays": return $"date_add({left}, interval ({args1}) day)";
|
||
case "AddHours": return $"date_add({left}, interval ({args1}) hour)";
|
||
case "AddMilliseconds": return $"date_add({left}, interval ({args1})*1000 microsecond)";
|
||
case "AddMinutes": return $"date_add({left}, interval ({args1}) minute)";
|
||
case "AddMonths": return $"date_add({left}, interval ({args1}) month)";
|
||
case "AddSeconds": return $"date_add({left}, interval ({args1}) second)";
|
||
case "AddTicks": return $"date_add({left}, interval ({args1})/10 microsecond)";
|
||
case "AddYears": return $"date_add({left}, interval ({args1}) year)";
|
||
case "Subtract":
|
||
switch ((exp.Arguments[0].Type.IsNullableType() ? exp.Arguments[0].Type.GetGenericArguments().FirstOrDefault() : exp.Arguments[0].Type).FullName)
|
||
{
|
||
case "System.DateTime": return $"timestampdiff(microsecond, {args1}, {left})";
|
||
case "System.TimeSpan": return $"date_sub({left}, interval ({args1}) microsecond)";
|
||
}
|
||
break;
|
||
case "Equals": return $"({left} = {args1})";
|
||
case "CompareTo": return $"timestampdiff(microsecond,{args1},{left})";
|
||
case "ToString":
|
||
if (exp.Arguments.Count == 0) return $"date_format({left},'%Y-%m-%d %H:%i:%s.%f')";
|
||
switch (args1)
|
||
{
|
||
case "'yyyy-MM-dd HH:mm:ss'": return $"date_format({left},'%Y-%m-%d %H:%i:%s')";
|
||
case "'yyyy-MM-dd HH:mm'": return $"date_format({left},'%Y-%m-%d %H:%i')";
|
||
case "'yyyy-MM-dd HH'": return $"date_format({left},'%Y-%m-%d %H')";
|
||
case "'yyyy-MM-dd'": return $"date_format({left},'%Y-%m-%d')";
|
||
case "'yyyy-MM'": return $"date_format({left},'%Y-%m')";
|
||
case "'yyyyMMddHHmmss'": return $"date_format({left},'%Y%m%d%H%i%s')";
|
||
case "'yyyyMMddHHmm'": return $"date_format({left},'%Y%m%d%H%i')";
|
||
case "'yyyyMMddHH'": return $"date_format({left},'%Y%m%d%H')";
|
||
case "'yyyyMMdd'": return $"date_format({left},'%Y%m%d')";
|
||
case "'yyyyMM'": return $"date_format({left},'%Y%m')";
|
||
case "'yyyy'": return $"date_format({left},'%Y')";
|
||
case "'HH:mm:ss'": return $"date_format({left},'%H:%i:%s')";
|
||
}
|
||
args1 = Regex.Replace(args1, "(yyyy|yy|MM|M|dd|d|HH|H|hh|h|mm|ss|tt)", m =>
|
||
{
|
||
switch (m.Groups[1].Value)
|
||
{
|
||
case "yyyy": return $"%Y";
|
||
case "yy": return $"%y";
|
||
case "MM": return $"%_a1";
|
||
case "M": return $"%c";
|
||
case "dd": return $"%d";
|
||
case "d": return $"%e";
|
||
case "HH": return $"%H";
|
||
case "H": return $"%k";
|
||
case "hh": return $"%h";
|
||
case "h": return $"%l";
|
||
case "mm": return $"%i";
|
||
case "ss": return $"%_a2";
|
||
case "tt": return $"%p";
|
||
}
|
||
return m.Groups[0].Value;
|
||
});
|
||
var argsFinds = new[] { "%Y", "%y", "%_a1", "%c", "%d", "%e", "%H", "%k", "%h", "%l", "%i", "%_a2", "%p" };
|
||
var argsSpts = Regex.Split(args1, "(m|s|t)");
|
||
for (var a = 0; a < argsSpts.Length; a++)
|
||
{
|
||
switch (argsSpts[a])
|
||
{
|
||
case "m": argsSpts[a] = $"case when substr(date_format({left},'%i'),1,1) = '0' then substr(date_format({left},'%i'),2,1) else date_format({left},'%i') end"; break;
|
||
case "s": argsSpts[a] = $"case when substr(date_format({left},'%s'),1,1) = '0' then substr(date_format({left},'%s'),2,1) else date_format({left},'%s') end"; break;
|
||
case "t": argsSpts[a] = $"trim(trailing 'M' from date_format({left},'%p'))"; 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)) ? $"date_format({left},'{argsSptsA}')" : $"'{argsSptsA}'";
|
||
break;
|
||
}
|
||
}
|
||
if (argsSpts.Length > 0) args1 = $"concat({string.Join(", ", argsSpts.Where(a => a != "''"))})";
|
||
return args1.Replace("%_a1", "%m").Replace("%_a2", "%s");
|
||
}
|
||
}
|
||
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])})*{(long)1000000 * 60 * 60 * 24})";
|
||
case "FromHours": return $"(({getExp(exp.Arguments[0])})*{(long)1000000 * 60 * 60})";
|
||
case "FromMilliseconds": return $"(({getExp(exp.Arguments[0])})*1000)";
|
||
case "FromMinutes": return $"(({getExp(exp.Arguments[0])})*{(long)1000000 * 60})";
|
||
case "FromSeconds": return $"(({getExp(exp.Arguments[0])})*1000000)";
|
||
case "FromTicks": return $"(({getExp(exp.Arguments[0])})/10)";
|
||
case "Parse": return $"cast({getExp(exp.Arguments[0])} as signed)";
|
||
case "ParseExact":
|
||
case "TryParse":
|
||
case "TryParseExact": return $"cast({getExp(exp.Arguments[0])} as signed)";
|
||
}
|
||
}
|
||
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 char)";
|
||
}
|
||
}
|
||
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 unsigned)";
|
||
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 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":
|
||
case "ToInt32":
|
||
case "ToInt64":
|
||
case "ToSByte": return $"cast({getExp(exp.Arguments[0])} as signed)";
|
||
case "ToSingle": return $"cast({getExp(exp.Arguments[0])} as decimal(14,7))";
|
||
case "ToString": return $"cast({getExp(exp.Arguments[0])} as char)";
|
||
case "ToUInt16":
|
||
case "ToUInt32":
|
||
case "ToUInt64": return $"cast({getExp(exp.Arguments[0])} as unsigned)";
|
||
}
|
||
}
|
||
return null;
|
||
}
|
||
}
|
||
}
|