[ADMIN] How to find and/or REINDEX only GiST indexes in the database?

[Gnanakumar]

Hi,

We're planning to upgrade our Production server from PostgreSQL v8.2.3 to
the latest version in 8.2 series, that is v8.2.22.

In 8.2.11 Release Notes here
http://www.postgresql.org/docs/current/interactive/release-8-2-11.html, it's
been mentioned that:
"Also, if you were running a previous 8.2.X release, it is recommended to
REINDEX all GiST indexes after the upgrade."

My question is, how do I find out or REINDEX *only* GiST indexes in the
database? Is there a single syntax/command that does this?

Regards,
Gnanam

[Achilleas Mantzios]

Post by Gnanakumar
Hi,
We're planning to upgrade our Production server from PostgreSQL v8.2.3 to
the latest version in 8.2 series, that is v8.2.22.
In 8.2.11 Release Notes here
http://www.postgresql.org/docs/current/interactive/release-8-2-11.html, it's
"Also, if you were running a previous 8.2.X release, it is recommended to
REINDEX all GiST indexes after the upgrade."
My question is, how do I find out or REINDEX *only* GiST indexes in the
database? Is there a single syntax/command that does this?

I guess not, one way is to take an ascii schema-only dump and parse it,
looking for GIST indexes.

Anotherway is to look in those tables:
SELECT oid,* from pg_opclass ; -- to find the GIST class
SELECT c.relname,indclass from pg_catalog.pg_index i,pg_catalog.pg_class c where indexrelid=c.oid;
^^ to find those indexes which have this gist class oid in the indclass field.

Note tho, that indclass is oidvector, and i dont know how you could iterate on those (by SQL),
without writing a C (or other) program.

Post by Gnanakumar
Regards,
Gnanam

[Tom Lane]

Post by Gnanakumar
My question is, how do I find out or REINDEX *only* GiST indexes in the
database? Is there a single syntax/command that does this?

You could do something like

select relname from pg_class where relam = (select oid from pg_am where amname = 'gist');


regards, tom lane

[Kevin Grittner]

Post by Gnanakumar
how do I find out or REINDEX *only* GiST indexes in the
database? Is there a single syntax/command that does this?

I would probably capture the output from:

SELECT indexdef || ';'
FROM pg_indexes
WHERE indexdef ~ ' USING gist ';

-Kevin