private LeftJoinExpression VisitLeftJoinExpression(LeftJoinExpression leftJoinExpression)
{
var newTable = (TableExpressionBase)Visit(leftJoinExpression.Table);
var newJoinPredicate = VisitJoinPredicate((SqlBinaryExpression)leftJoinExpression.JoinPredicate);
return(leftJoinExpression.Update(newTable, newJoinPredicate));
}
protected override Expression VisitLeftJoin(LeftJoinExpression leftJoinExpression)
{
_relationalCommandBuilder.Append("LEFT JOIN ");
Visit(leftJoinExpression.Table);
_relationalCommandBuilder.Append(" ON ");
Visit(leftJoinExpression.JoinPredicate);
return(leftJoinExpression);
}
protected override Expression VisitLeftJoin(LeftJoinExpression leftJoinExpression)
{
var canOptimize = _canOptimize;
_canOptimize = false;
var newTable = (TableExpressionBase)Visit(leftJoinExpression.Table);
var newJoinPredicate = VisitJoinPredicate((SqlBinaryExpression)leftJoinExpression.JoinPredicate);
_canOptimize = canOptimize;
return(leftJoinExpression.Update(newTable, newJoinPredicate));
}
protected override Expression VisitExtension(Expression extensionExpression)
{
Check.NotNull(extensionExpression, nameof(extensionExpression));
return(extensionExpression switch
{
ShapedQueryExpression shapedQueryExpression => VisitShapedQueryExpression(shapedQueryExpression),
CaseExpression caseExpression => VisitCase(caseExpression),
SelectExpression selectExpression => VisitSelect(selectExpression),
InnerJoinExpression innerJoinExpression => VisitInnerJoin(innerJoinExpression),
LeftJoinExpression leftJoinExpression => VisitLeftJoin(leftJoinExpression),
_ => base.VisitExtension(extensionExpression),
});
protected override Expression VisitLeftJoin(LeftJoinExpression leftJoinExpression)
{
var parentSearchCondition = _isSearchCondition;
_isSearchCondition = false;
var table = (TableExpressionBase)Visit(leftJoinExpression.Table);
_isSearchCondition = true;
var joinPredicate = (SqlExpression)Visit(leftJoinExpression.JoinPredicate);
_isSearchCondition = parentSearchCondition;
return(leftJoinExpression.Update(table, joinPredicate));
}
/// <summary> /// Visits the children of the left join expression. /// </summary> /// <param name="leftJoinExpression"> The expression to visit. </param> /// <returns> The modified expression, if it or any subexpression was modified; otherwise, returns the original expression. </returns> protected abstract Expression VisitLeftJoin([NotNull] LeftJoinExpression leftJoinExpression);
protected abstract Expression VisitLeftJoin(LeftJoinExpression leftJoinExpression);
protected override Expression VisitLeftJoin(LeftJoinExpression leftJoinExpression)
{
Visit(leftJoinExpression.Table);
Visit(leftJoinExpression.JoinPredicate);
return(leftJoinExpression);
}
protected override Expression VisitLeftJoin(LeftJoinExpression x)
{
return(x?.Update(x.Table.VisitNode(this), x.JoinPredicate.VisitNode(this)));
}
protected override Expression VisitLeftJoin(LeftJoinExpression leftJoinExpression)
{
return(base.VisitLeftJoin(leftJoinExpression));
}
