From: | Bruce Momjian <pgman(at)candle(dot)pha(dot)pa(dot)us> |
---|---|
To: | Chris <chris(at)bitmead(dot)com> |
Cc: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us>, pgsql-hackers(at)postgreSQL(dot)org, pgsql-sql(at)postgreSQL(dot)org |
Subject: | Re: [HACKERS] Re: [SQL] Proposed Changes to PostgreSQL |
Date: | 2000-02-03 12:13:36 |
Message-ID: | 200002031213.HAA20196@candle.pha.pa.us |
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Lists: | pgsql-general pgsql-hackers pgsql-sql |
> Tom Lane wrote:
>
> > I'll comment on the other issues later ... but I will say that I don't
> > think it's acceptable to add *any* overhead to standard-SQL queries
> > in order to support inheritance better. The vast majority of our users
> > want SQL performance and don't give a damn about inheritance. We have
> > to pay attention to that.
>
> 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. Could you do that for relhassubclass?
--
Bruce Momjian | http://www.op.net/~candle
pgman(at)candle(dot)pha(dot)pa(dot)us | (610) 853-3000
+ If your life is a hard drive, | 830 Blythe Avenue
+ Christ can be your backup. | Drexel Hill, Pennsylvania 19026
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