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> A quick check for existance:
>
> SELECT * FROM pg_class WHERE relname = 'name_of_temp_table' and relkind = ?
>
> You'll want to look in the docs about the PG system tables to see what
> "relkind" you should test on for each type of object.
If you are using 7.3, you also need to to consider the namespace:
temporary relations live in their own schema.
To find out if the temporary table (relkind='r') named "neptune" exists:
SELECT COUNT(*) FROM pg_class WHERE LOWER(relname) = 'neptune' AND relkind = 'r' AND relnamespace IN (SELECT oid FROM
pg_namespaceWHERE nspname ~ '^pg_temp');
To find out about a sequence (relkind='S') named "saturn" exists:
SELECT COUNT(*) FROM pg_class WHERE LOWER(relname) = 'saturn' AND relkind = 'S' AND relnamespace IN (SELECT oid FROM
pg_namespaceWHERE nspname ~ '^pg_temp');
To find out if "jupiter" is used by any temp relations:
SELECT COUNT(*) FROM pg_class WHERE LOWER(relname) = 'jupiter' AND relnamespace IN (SELECT oid FROM pg_namespace WHERE
nspname~ '^pg_temp');
To use the above on a pre-7.3 system, just remove the last line that
mentions relnamespace.
- --
Greg Sabino Mullane greg@turnstep.com
PGP Key: 0x14964AC8 200302141327
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