On Thu, 2008-01-31 at 10:22 +0000, Gregory Stark wrote:
> "Decibel!" <decibel@decibel.org> 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.
Is it really ?
What change does TRUNCATE make in table definition ?
>
> 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.
>
> By that definition CLUSTER is DDL and TRUNCATE is DDL if you look at the
> implementation rather than the user-visible effects.
>