Hi all,
argList is a List<Integer> in AggregationCall. Is there any way to know
that the argument in the argList is actually a constant (or a literal)? For
example, in the following operator tree, I would like to know that $1 in
the aggregation call of "percentile_approx" is actually a constant of
"5E-1" or 0.5.
HiveAggregate(group=[{}], agg#0=[percentile_approx($0, $1)]):
HiveProject($f0=[$0], $f1=[5E-1]):
HiveTableScan(table=[[default.s]], qbid:alias=[s]):
I have tried inputRel.getChildExps(). It works in the above example
because HiveProject.getChildExps() will give me RexLiteral. But for some
other cases it does not work. For example, when there are other operators
in between the Aggregate and the Project, which has an empty ChildExps.
Thanks!
Best
Pengcheng
