varchar_pattern_ops in 7.3.4?

[Kragen Sitaker]

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?

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[scott.marlowe]

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.
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[Kragen Sitaker]

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.)

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