On Thu, Jan 31, 2008 at 10:22:42AM +0000, Gregory Stark wrote: > > "Decibel!" <[EMAIL PROTECTED]> writes: > > > CLUSTER isn't DDL. Most forms of ALTER TABLE are. And CREATE blah, > > etc. > > Fwiw I would call CLUSTER DDL. Note that it does make a change > that's visible in the table definition afterwards. > > There are plenty of DDL commands which modify data (CREATE INDEX, > ATLER TABLE ALTER COLUMN TYPE). The defining characteristic of DDL > is not that it doesn't modify the data but that it does modify the > table definition.
Counter-example: ALTER TABLE ALTER COLUMN USING will almost certainly modify data, but it's DDL nonetheless. > By that definition CLUSTER is DDL and TRUNCATE is DDL if you look at > the implementation rather than the user-visible effects. I agree that both are more DDL-like than DML-like. Cheers, David. -- David Fetter <[EMAIL PROTECTED]> http://fetter.org/ Phone: +1 415 235 3778 AIM: dfetter666 Yahoo!: dfetter Skype: davidfetter XMPP: [EMAIL PROTECTED] Remember to vote! Consider donating to Postgres: http://www.postgresql.org/about/donate ---------------------------(end of broadcast)--------------------------- TIP 6: explain analyze is your friend
