Github user hornn commented on the issue:
https://github.com/apache/incubator-hawq/pull/1002
@sansanichfb - did you compare performance before and after the change?
IIRC this function is used internally every time an hcatalog object is created,
so it should be fast.
After this change we'll have 1 + [number of tables with oids] queries,
where before we had 2 queries (one with [number of tables with oids] joins), so
it is probably good to check that the new approach is not slower.
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