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

[Gnanam]

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



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[Achilleas Mantzios]

Στις Wednesday 12 October 2011 15:46:45 ο/η Gnanakumar έγραψε:

> 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?

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.

>
> Regards,
> Gnanam
>
>
>



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Achilleas Mantzios

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[Tom Lane-2]

"Gnanakumar" <[hidden email]> writes:
> 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

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[Kevin Grittner]

"Gnanakumar" <[hidden email]> wrote:
 
> 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

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[Dimitri Fontaine-7]

"Gnanakumar" <[hidden email]> writes:
> 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 might find this article useful:

  http://tapoueh.org/blog/2010/08/05-querying-the-catalog-to-plan-an-upgrade.html

Regards,
--
Dimitri Fontaine
http://2ndQuadrant.fr     PostgreSQL : Expertise, Formation et Support

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