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Re: Why is UseDeclareFetch so slow?

From: Rainer Bauer <usenet(at)munnin(dot)com>
To: pgsql-odbc(at)postgresql(dot)org
Subject: Re: Why is UseDeclareFetch so slow?
Date: 2007-06-27 14:40:45
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgsql-odbc
Hello Hiroshi,

>> So my questions are
>> 1) Is there any chance the driver itself could be enhanced like Dimitri
>> suggested here:
>> <>?
>You can specify the fetch count in UseDeclareFetch mode using the
>  Cache Size option or FETCH=N connection string.

Yes, but the real question is why is the query 4 times slower when
UseDeclareFetch is enabled (FETCH was set to 100)?

I would have expected that the ODBC driver is fetching 100 rows in advance and
thus the query should execute in less than a second instead of 30 seconds.


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Subject: Re: Why is UseDeclareFetch so slow?
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