| From: | Ernest E Vogelsinger <ernest(at)vogelsinger(dot)at> |
|---|---|
| To: | Jodi Kanter <jkanter(at)virginia(dot)edu> |
| Cc: | Postgres Admin List <pgsql-admin(at)postgresql(dot)org> |
| Subject: | Re: psql sequence question |
| Date: | 2003-06-16 18:26:37 |
| Message-ID: | 5.1.1.6.2.20030616202213.03ce7be0@mail.vogelsinger.at |
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| Lists: | pgsql-admin |
At 17:24 16.06.2003, Jodi Kanter said:
--------------------[snip]--------------------
>If I'm using transactions (not autocommit), are sequences atomic?
Yes
>In other words, after inserting a record to a table that
>uses sequence A, am I guaranteed that select last_value on
>sequence A is atomic, and cannot be interfered with by other
>transactions using that same sequence? Sequence A is used by
>several tables.
Yes. But you should use currval('seq_name') since this guarantees to return
the last value returned to the current connection. Check the recent posts -
there was a discussion on just this topic.
--
>O Ernest E. Vogelsinger
(\) ICQ #13394035
^ http://www.vogelsinger.at/
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