protected override Expression VisitSelect(SelectExpression select)
{
if (select.DefaultFieldNames != null) {
this.defaultFieldNames = select.DefaultFieldNames;
}
if (select.From != null) {
this.VisitSource(select.From);
}
if (select.Where != null) {
this.Visit(select.Where);
}
return select;
}
internal ProjectionExpression(SelectExpression source, Expression projector)
: base((ExpressionType)LuceneExpressionType.Projection, source.Type)
{
this._source = source;
this._projector = projector;
}
protected virtual Expression VisitSelect(SelectExpression select)
{
Expression from = this.VisitSource(select.From);
Expression where = this.Visit(select.Where);
ReadOnlyCollection<FieldDeclaration> fields = this.VisitFieldDeclarations(select.Fields);
if (from != select.From || where != select.Where || fields != select.Fields)
{
return new SelectExpression(select.Type, select.Alias, fields, select.DefaultFieldNames, from, where);
}
return select;
}