equal() needs a case for Aggref nodes, as shown by: regression=> select sum(q1) from int8_tbl group by q2 order by sum(q1); NOTICE:  equal: don't know whether nodes of type 107 are equal
equal() needs a case for Aggref nodes, as shown by:
regression=> select sum(q1) from int8_tbl group by q2 order by sum(q1);
NOTICE:  equal: don't know whether nodes of type 107 are equal

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