protected virtual JoinQuery CreateJoinQuery(IExecutionContext context, [NotNull] IMultiPartQuery query)
{
var filter = query.GetFilter(context);
var leftFilter = filter.RemoveAllPartsThatAreNotInSource(this.Left);
var rightFilter = filter.RemoveAllPartsThatAreNotInSource(this.Right);
var resultFilter = filter.SplitByAndExpressions()
.Except(leftFilter.SplitByAndExpressions(), JoinSourceBase.ExpressionComparer)
.Except(rightFilter.SplitByAndExpressions(), JoinSourceBase.ExpressionComparer)
.DefaultIfEmpty()
.Aggregate(Expression.AndAlso);
var leftQuery = new MultiPartQuery
{
Fields = query.GetUsedFields(this.Left, resultFilter),
FilterExpression = leftFilter,
};
var rightQuery = new MultiPartQuery
{
Fields = query.GetUsedFields(this.Right, resultFilter),
FilterExpression = leftFilter,
};
return(new JoinQuery(leftQuery, rightQuery, resultFilter, query.OrderByExpressions));
}
protected override JoinQuery CreateJoinQuery(IExecutionContext context, [NotNull] IMultiPartQuery query)
{
var resultFilter = query.GetFilter(context);
var leftQuery = new MultiPartQuery
{
Fields = query.GetUsedFields(this.Left, resultFilter),
};
var rightQuery = new MultiPartQuery
{
Fields = query.GetUsedFields(this.Right, resultFilter),
};
return(new JoinQuery(leftQuery, rightQuery, resultFilter, query.OrderByExpressions));
}