> Bruce Momjian wrote:
>
> > > Well I see that pg_class has columns like "relhasindex". If we added a
> > > "relhassubclass", the overhead should be unmeasureable.
> >
> > Yes, but how do you keep that accurate? If I add indexes, then drop
> > them, does relhasindex go to false.
>
> I don't know. Does it?
Oops:test=> create table test(x int);CREATEtest=> create index i_test on test(x);CREATEtest=> select relhasindex from
pg_classwhere relname = 'test'; relhasindex ------------- t(1 row)
test=> drop index i_test;DROPtest=> select relhasindex from pg_class where relname = 'test'; relhasindex -------------
t(1row)
Let me add that to the TODO list.
>
> >Could you do that for relhassubclass?
>
> If we made it relnumsubclasses and incremented/decremented on
> CREATE/DROP, it seems easy in theory.
Yes, that would work. Seems hasindex has problems.
-- Bruce Momjian | http://www.op.net/~candle pgman@candle.pha.pa.us | (610)
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