Re: ALTER command reworks

Excerpts from Kohei KaiGai's message of lun sep 10 08:08:32 -0300 2012:

> As attached, I split off the original one into three portions; for set-schema,
> set-owner and rename-to. Please apply them in order of patch filename.
> Regarding to the error message, RenameErrorMsgAlreadyExists() was added
> to handle per object type messages in case when aclcheck_error() is not
> available to utilize.

I have pushed the regression tests and parts 1 and 2.  Only part 3 is
missing from this series, but I'm not as sure about that one as the
other two.  Not really a fan of RenameErrorMsgAlreadyExists() as coded,
but I'll think more about it.

--
Álvaro Herrera                http://www.2ndQuadrant.com/
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