From: AI Rumman <rummandba@gmail.com>
To: pgsql-performance@postgresql.org
To: pgsql-general@postgresql.org
Subject: index is not using
Date: Tue, 9 Feb 2010 13:43:56 +0600
Message-ID: <2a7905441002082343g1dd0c8ebg5a27f7d44ec9fdb1@mail.gmail.com> (raw)
I have created a index
create index leadaddress_phone_idx on
leadaddress(regexp_replace((phone)::text, '[^0-9]*'::text, ''::text,
'g'::text));
But the index is not using.
explain select * from leadaddress where
regexp_replace(phone,'[^0-9]*','','g') like '%2159438606';
QUERY
PLAN
--------------------------------------------------------------------------------------------------------
Seq Scan on leadaddress (cost=100000000.00..100009699.81 rows=1 width=97)
Filter: (regexp_replace((phone)::text, '[^0-9]*'::text, ''::text,
'g'::text) ~~ '%2159438606'::text)
Could anyone please tell me why? I analyzed the table after index creation.
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To: pgsql-performance@postgresql.org
Cc: rummandba@gmail.com, pgsql-general@postgresql.org
Subject: Re: index is not using
In-Reply-To: <2a7905441002082343g1dd0c8ebg5a27f7d44ec9fdb1@mail.gmail.com>
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