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Re: ALTER TABLE TODO items - Mailing list pgsql-hackers

From Tom Lane
Subject Re: ALTER TABLE TODO items
Date
Msg-id 8274.1083779944@sss.pgh.pa.us
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In response to ALTER TABLE TODO items  (Bruce Momjian <pgman@candle.pha.pa.us>)
Responses Re: ALTER TABLE TODO items
Re: ALTER TABLE TODO items
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Bruce Momjian <pgman@candle.pha.pa.us> writes:
> Wow, you can reference different column as part of the alter column.

Yeah, the USING is actually any arbitrary expression over the old table
row.  (Getting that to work was a tad tricky...)  So you can view this
as a full-table UPDATE operation that folds in possible column type changes.
        regards, tom lane

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