RelationFlushRelation() or RelationClearRelation()

Hi,

I've almost got the ALTER TABLE RENAME fixed so it doesn't break
triggers referring to the renamed column. The final problem is that
after the pg_trigger.tgargs is updated, that change is not visible
in the current backend. I see that there are a couple of interesting
functions to refresh the RelationCache:

RelationClearRelation(Relation, bool);

RelationFlushRelation(Relation);

Which one of these should I use to have the new pg_trigger data visible
in the current backend? Or is there a better way than either of these?

I should be able to clean up this work and send a patch tomorrow
evening if I get this kink worked out.

Thanks,
Brent

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