Re: Bad optimizer data for xml (WAS: xml data type implications of no =)

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От Robert Haas
Тема Re: Bad optimizer data for xml (WAS: xml data type implications of no =)
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Msg-id AANLkTikKCRt6sGM6lpJFr-TvhTJeGpOQYbcUx6nbbPPg@mail.gmail.com
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Ответ на Re: Bad optimizer data for xml (WAS: xml data type implications of no =)  (Tom Lane <tgl@sss.pgh.pa.us>)
Ответы Re: Bad optimizer data for xml (WAS: xml data type implications of no =)
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On Wed, Jun 9, 2010 at 1:14 AM, Tom Lane <tgl@sss.pgh.pa.us> wrote:
> Robert Haas <robertmhaas@gmail.com> writes:
>> It's possible. =A0I don't really see a reason not to add an =3D operator
>> for XML - does anyone else?
>
> Yes, that was considered and rejected, IIRC. =A0What is your definition
> of equality for xml?

I'd vote for !memcmp().

There can be (and probably already are) other ways to test for other
kinds of equality, too, of course.

--=20
Robert Haas
EnterpriseDB: http://www.enterprisedb.com
The Enterprise Postgres Company

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