From: Greg Caulton <caultonpos@gmail.com>
To: Kevin Grittner <Kevin.Grittner@wicourts.gov>
To: pgsql-performance@postgresql.org
Subject: Re: cant get an index scan with a LIKE
Date: Mon, 6 Oct 2008 20:15:50 -0400
Message-ID: <e44fb6470810061715j76ecf103h111e0e76f8bc23bb@mail.gmail.com> (raw)
In-Reply-To: <48EA6015.EE98.0025.0@wicourts.gov>
References: <e44fb6470810061647x6b09cee0q4c2e320e78aff97e@mail.gmail.com>
<48EA6015.EE98.0025.0@wicourts.gov>
That worked great - THANKS!
CREATE INDEX sct_descriptions_k2
ON sct_descriptions
USING btree
(term_index varchar_pattern_ops);
I noticed I had to keep the original index for the non-like operator
but that is not a big deal
CREATE INDEX sct_descriptions_k1
ON sct_descriptions
USING btree
(term_index );
thanks again
Greg
On Mon, Oct 6, 2008 at 7:59 PM, Kevin Grittner
<Kevin.Grittner@wicourts.gov> wrote:
>>>> "Greg Caulton" <caultonpos@gmail.com> wrote:
>
>> but I get a sequential scan when I do where term_index like
>>
>> select * from sct_descriptions where term_index like 'CHILLS AND
> FEVER
>> (FINDING)'
>
>> Is there anything else I can do? Settings below, this is PostgreSQL
> 8.3
>
>> "lc_collate";"English_United States.1252"
>> "lc_ctype";"English_United States.1252"
>> "lc_messages";"English_United States"
>> "lc_monetary";"English_United States"
>> "lc_numeric";"English_United States"
>> "lc_time";"English_United States"
>
> This issue is discussed here:
>
> http://www.postgresql.org/docs/8.2/interactive/locale.html
>
> with a solution to your specific problem mentioned here:
>
> http://www.postgresql.org/docs/8.2/interactive/indexes-opclass.html
>
> You can create an index with the appropriate operator type to get LIKE
> to work as you want. I hope this helps.
>
> -Kevin
>
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To: pgsql-performance@postgresql.org
Cc: caultonpos@gmail.com, Kevin.Grittner@wicourts.gov
Subject: Re: cant get an index scan with a LIKE
In-Reply-To: <e44fb6470810061715j76ecf103h111e0e76f8bc23bb@mail.gmail.com>
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