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Re: "ORDER BY" clause prevents "UPDATE WHERE CURRENT OF" - Mailing list pgsql-hackers

From Tom Lane
Subject Re: "ORDER BY" clause prevents "UPDATE WHERE CURRENT OF"
Date
Msg-id 21885.1226700364@sss.pgh.pa.us
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In response to "ORDER BY" clause prevents "UPDATE WHERE CURRENT OF"  ("Robert Haas" <robertmhaas@gmail.com>)
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"Robert Haas" <robertmhaas@gmail.com> writes:
> I found the following behavior surprising.  Is there a reason for it?

Yes.
        regards, tom lane

(Oh, you wanted to know what the reason is?  It's because a sort step
is not going to pass through any tuple identity information.)

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