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Re: Nested Loop "Killer" on 8.1

From: Mark Mielke <mark(at)mark(dot)mielke(dot)cc>
To: Greg Stark <gsstark(at)mit(dot)edu>
Cc: Dave North <DNorth(at)signiant(dot)com>, pgsql-performance(at)postgresql(dot)org
Subject: Re: Nested Loop "Killer" on 8.1
Date: 2009-06-25 20:57:42
Message-ID: (view raw, whole thread or download thread mbox)
Lists: pgsql-performance
On 06/25/2009 04:36 PM, Greg Stark wrote:
>> AND
>>     web_user_property_directory_outbox.prop_key like
>> 'location_node_directory_outbox'
> Why use "like" for a constant string with no % or _ characters? If you
> used = the planner might be able to come up with a better estimate

Any reason why "like" with a constant string without % or _ is not 
optimized to = today?


Mark Mielke<mark(at)mielke(dot)cc>

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Subject: Re: Nested Loop "Killer" on 8.1
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