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EXP Analytic optimization

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This commit is contained in:
sunkaixuan
2017-07-11 13:27:41 +08:00
parent d3de52b89f
commit 8324841fab
4 changed files with 31 additions and 4 deletions
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17
Src/Asp.Net/SqlSugar/ExpressionsToSql/ExpressionContext.cs
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@@ -16,10 +16,25 @@ namespace SqlSugar
{ {
#region Fields #region Fields
private bool _IsSingle = true; private bool _IsSingle = true;
private IDbMethods _DbMehtods { get; set; }
#endregion #endregion
#region properties #region properties
public IDbMethods DbMehtods { get; set; } public IDbMethods DbMehtods
{
get
{
if (_DbMehtods == null)
{
_DbMehtods = new DefaultDbMethod();
}
return _DbMehtods;
}
set
{
_DbMehtods = value;
}
}
public int Index { get; set; } public int Index { get; set; }
public int ParameterIndex { get; set; } public int ParameterIndex { get; set; }
public MappingColumnList MappingColumns { get; set; } public MappingColumnList MappingColumns { get; set; }

12
Src/Asp.Net/SqlSugar/ExpressionsToSql/Method/DefaultDbMethod.cs
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@@ -6,7 +6,7 @@ using System.Text;
using System.Threading.Tasks; using System.Threading.Tasks;
namespace SqlSugar namespace SqlSugar
{ {
public abstract partial class DefaultDbMethod : IDbMethods public partial class DefaultDbMethod : IDbMethods
{ {
public virtual string IIF(MethodCallExpressionModel model) public virtual string IIF(MethodCallExpressionModel model)
{ {
@@ -260,5 +260,15 @@ namespace SqlSugar
var parameter1 = model.Args[1]; var parameter1 = model.Args[1];
return string.Format("{0}", parameter1.MemberValue); return string.Format("{0}", parameter1.MemberValue);
} }
public virtual string True()
{
return "( 1 = 1 ) ";
}
public virtual string False()
{
return "( 1 = 2 ) ";
}
} }
} }

2
Src/Asp.Net/SqlSugar/ExpressionsToSql/Method/IDbMethods.cs
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@@ -47,5 +47,7 @@ namespace SqlSugar
string AggregateMax(MethodCallExpressionModel model); string AggregateMax(MethodCallExpressionModel model);
string AggregateCount(MethodCallExpressionModel model); string AggregateCount(MethodCallExpressionModel model);
string MappingColumn(MethodCallExpressionModel model); string MappingColumn(MethodCallExpressionModel model);
string True();
string False();
} }
} }

4
Src/Asp.Net/SqlSugar/ExpressionsToSql/ResolveItems/ConstantExpressionResolve.cs
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@@ -35,7 +35,7 @@ namespace SqlSugar
var parentIsRoot = parameter.BaseParameter.CurrentExpression is LambdaExpression; var parentIsRoot = parameter.BaseParameter.CurrentExpression is LambdaExpression;
if (parentIsRoot && value != null && value.GetType() == PubConst.BoolType) if (parentIsRoot && value != null && value.GetType() == PubConst.BoolType)
{ {
this.Context.Result.Append(value.ObjToBool() ? "( 1 = 1 ) " : "( 1 = 2 ) "); this.Context.Result.Append(value.ObjToBool() ? this.Context.DbMehtods.True() :this.Context.DbMehtods.False());
break; break;
} }
if (parentIsBinary && value != null && value.GetType() == PubConst.BoolType && parameter.BaseExpression != null) if (parentIsBinary && value != null && value.GetType() == PubConst.BoolType && parameter.BaseExpression != null)
@@ -47,7 +47,7 @@ namespace SqlSugar
parameter.BaseExpression.NodeType == ExpressionType.OrElse; parameter.BaseExpression.NodeType == ExpressionType.OrElse;
if (isLogicOperator) if (isLogicOperator)
{ {
AppendMember(parameter, isLeft, (value.ObjToBool() ? "( 1 = 1 ) " : "( 1 = 2 ) ")); AppendMember(parameter, isLeft, (value.ObjToBool() ? this.Context.DbMehtods.True(): this.Context.DbMehtods.False()));
break; break;
} }
} }