Re: Using max() MUCH slower in v7.1

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От Tom Lane
Тема Re: Using max() MUCH slower in v7.1
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Msg-id 1270.979802047@sss.pgh.pa.us
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Ответ на Re: Using max() MUCH slower in v7.1  (Tom Lane <tgl@sss.pgh.pa.us>)
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>> CREATE VIEW LastDate AS
>> SELECT        Company,
>> max(Date) AS Date
>> FROM            PastInvoices
>> GROUP BY    Company;

>> And then call it like
>> SELECT Date FROM LastDate ORDER BY Date WHERE Company = 'SomeCompany';

>> It takes ABSOLUTELY forever. The table has about 25-30M records.

> The problem is that 7.1 isn't pushing the WHERE restriction down into
> the view.

OK, I did something about this ...

            regards, tom lane

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