C# (CSharp) ExistsExpression.Update示例

示例#1

        protected override Expression VisitExists(ExistsExpression existsExpression)
        {
            var parentSearchCondition = _isSearchCondition;

            _isSearchCondition = false;
            var subquery = (SelectExpression)Visit(existsExpression.Subquery);

            _isSearchCondition = parentSearchCondition;

            return(ApplyConversion(existsExpression.Update(subquery), condition: true));
        }

示例#2

文件： MySqlBoolOptimizingExpressionVisitor.cs 项目： wilari932/Pomelo.EntityFrameworkCore.MySql

        protected override Expression VisitExists(ExistsExpression existsExpression)
        {
            var parentOptimize = _optimize;

            _optimize = false;
            var subquery = (SelectExpression)Visit(existsExpression.Subquery);

            _optimize = parentOptimize;

            return(ApplyConversion(existsExpression.Update(subquery), condition: true));
        }

示例#3

文件： NullSemanticsRewritingExpressionVisitor.cs 项目： zhaoqiyuan123/EntityFrameworkCore

        protected override Expression VisitExists(ExistsExpression existsExpression)
        {
            var canOptimize = _canOptimize;

            _canOptimize = false;
            var newSubquery = (SelectExpression)Visit(existsExpression.Subquery);

            _canOptimize = canOptimize;

            return(existsExpression.Update(newSubquery));
        }

示例#4

文件： FixCastErrorExpressionVisitor.cs 项目： myrp-alexandre/asp-net-core-extensions

 protected override Expression VisitExists(ExistsExpression x)
 {
     return(x?.Update(x.Subquery.VisitNode(this)));
 }