Looking into a bug report on the -general list about grouping sets,
which turns out to be an issue of collation assignment: if the query has
CASE GROUPING(expr) WHEN 1 ...
then the expression is rejected as not matching the one in the GROUP BY
clause, because CASE already assigned collations to the expression (as a
special case in its transform function) while the rest of the query
hasn't yet had them assigned, because parseCheckAggregates gets run
before assign_query_collations.
I'll be looking into this in detail later, but right now, cam anyone
think of any reason why parseCheckAggregates couldn't be moved to after
assign_query_collations?
--
Andrew (irc:RhodiumToad)
