S IAstVisitor <T, S> .VisitQueryGroupClause(QueryGroupClause queryGroupClause, T data)
{
var handler = QueryGroupClauseVisited;
if (handler != null)
{
handler(queryGroupClause, data);
}
return(VisitChildren(queryGroupClause, data));
}
public override AstNode VisitQueryGroupClause(QueryGroupClause queryGroupClause)
{
var param = CreateParameterForCurrentRangeVariable();
var keyLambda = CreateLambda(new[] { param }, VisitNested(queryGroupClause.Key, param));
if (IsSingleRangeVariable(queryGroupClause.Projection))
{
// We are grouping by the single active range variable, so we can use the single argument form of GroupBy
return(currentResult.Invoke("GroupBy", keyLambda));
}
else
{
var projectionParam = CreateParameterForCurrentRangeVariable();
var projectionLambda = CreateLambda(new[] { projectionParam }, VisitNested(queryGroupClause.Projection, projectionParam));
return(currentResult.Invoke("GroupBy", keyLambda, projectionLambda));
}
}
void IAstVisitor.VisitQueryGroupClause(QueryGroupClause queryGroupClause)
{
Visit(EnterQueryGroupClause, LeaveQueryGroupClause, queryGroupClause);
}
protected internal override bool DoMatch(AstNode other, PatternMatching.Match match)
{
QueryGroupClause o = other as QueryGroupClause;
return(o != null && this.Projection.DoMatch(o.Projection, match) && this.Key.DoMatch(o.Key, match));
}