Re: Get table catalog from pg_indexes

On 11/27/22 13:31, Ron wrote:
> On 11/27/22 11:22, Igor Korot wrote:
>> Hi, ALL,
>> Table pg_indexes does not contain a field for a catalog.
>>
>> So how do I get that?
>>
>> SELECT 1 FROM pg_indexes WHERE indexname = $1 AND tablename = $2 AND
>> schemaname = $3
>
> You did not look hard enough, or Google "postgresql pg_indexes".
>
> test=# \d pg_indexes
>             View "pg_catalog.pg_indexes"
>    Column   | Type | Collation | Nullable | Default
> ------------+------+-----------+----------+---------
> *schemaname* | name | |          |
> *tablename*  | name | |          |
> *indexname*  | name | |          |
>  tablespace | name |           |          |
>  indexdef   | text |           |          |
>
> https://www.postgresql.org/docs/current/view-pg-indexes.html

What the OP was looking for a field in the above that was catalogname or
datname per:

https://www.postgresql.org/docs/current/catalog-pg-database.html

Table "pg_catalog.pg_database"
Column | Type | Collation | Nullable | Default
---------------+-----------+-----------+----------+---------
oid | oid | | not null |
datname | name | | not null |
...

In other words to filter the pg_index results by database/catalog name.
Since pg_index is scoped to the database you are in when you do the
query that is not going to happen.

>
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> --
> Angular momentum makes the world go 'round.

--
Adrian Klaver
adrian(dot)klaver(at)aklaver(dot)com