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From: George Pavlov <[email protected]>
To: Joshua D. Drake <[email protected]>
Cc: Tom Lane <[email protected]>
Cc: [email protected]
Subject: Re: index vs. seq scan choice?
Date: Thu, 7 Jun 2007 15:21:14 -0700
Message-ID: <8C5B026B51B6854CBE88121DBF097A86DEA6C5@ehost010-33.exch010.intermedia.net> (raw)
In-Reply-To: <[email protected]>
References: <8C5B026B51B6854CBE88121DBF097A86C3A30D@ehost010-33.exch010.intermedia.net>
	<[email protected]>
	<8C5B026B51B6854CBE88121DBF097A86DEA6B4@ehost010-33.exch010.intermedia.net>
	<[email protected]>

> From: Joshua D. Drake [mailto:[email protected]]
> 
> In those rare cases wouldn't it make more sense to just set 
> enable_seqscan to off; run query; set enable_seqscan to on;

1. these cases are not that rare (to me);

2. setting enable_seqscan (in JDBC, say) from the application makes the
whole thing quite a mess (need to do a batch of statements: each query
wrapped in its enable/disable seq scan?) -- ideally, one would like to
issue mostly SQL statements, not config parameters from the application;

3. if this is the recommended suggestion on how to run queries then why
don't we just add HINTS to the system and be done with it...

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