varchar_pattern_ops in 7.3.4?
I'd like to be able to do queries like "select count(*), fromline from
message where subject like 'Couldn%'" quickly. I see that, in current
Postgres, I can do this with an index like "create index message_subject
on message using btree(subject varchar_pattern_ops)". But I'm using
Postgres 7.3.4, and it doesn't seem to have varchar_pattern_ops in its
pg_opclass.opcname. Is there an easier way to do these queries than
upgrading?
On Wed, 21 Jan 2004, Kragen Sitaker wrote:
I'd like to be able to do queries like "select count(*), fromline from
message where subject like 'Couldn%'" quickly. I see that, in current
Postgres, I can do this with an index like "create index message_subject
on message using btree(subject varchar_pattern_ops)". But I'm using
Postgres 7.3.4, and it doesn't seem to have varchar_pattern_ops in its
pg_opclass.opcname. Is there an easier way to do these queries than
upgrading?
The only way to make that version work well here is to dump your database,
reinitdb with --locate=C and reimport your data. Then the indexes can be
used without having to have varchar_pattern_ops.
On Wed, Jan 21, 2004 at 04:54:26PM -0700, scott.marlowe wrote:
On Wed, 21 Jan 2004, Kragen Sitaker wrote:
... subject like 'Couldn%'" ... But I'm using Postgres 7.3.4, and
it doesn't seem to have varchar_pattern_ops in its pg_opclass.opcname. ...The only way to make that version work well here is to dump your database,
reinitdb with --locate=C and reimport your data. Then the indexes can be
used without having to have varchar_pattern_ops.
Thank you very much! (I assume you mean --locale=C, not --locate.)