| From: | Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> |
|---|---|
| To: | darcy(at)druid(dot)net ("D'Arcy" "J(dot)M(dot)" Cain) |
| Cc: | pgsql-hackers(at)postgreSQL(dot)org |
| Subject: | Re: [HACKERS] Empty system tables |
| Date: | 1999-05-21 15:07:02 |
| Message-ID: | 5484.927299222@sss.pgh.pa.us |
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| Lists: | pgsql-hackers |
darcy(at)druid(dot)net ("D'Arcy" "J.M." Cain) writes:
> perhaps we can update the docs to describe them.
> pg_listener
pg_listener records which backends are actively listening for NOTIFY
conditions, and is used to transmit NOTIFY signals from one backend to
another. It will be empty if you do not have any active LISTEN
commands.
> pg_shadow
Shadow user table, with the real passwords. (pg_user is actually
only a view of pg_shadow.)
> pg_statistic
Per-column stats collected by VACUUM ANALYZE and used by the query
optimizer.
Dunno about the rest.
regards, tom lane
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