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From: adam <adhamm31@hotmail.com>
To: pgsql-sql@postgresql.org
Subject: posgres optimizer not using the index on hstore     HELP
Date: Mon, 18 Jul 2016 08:18:42 -0700 (MST)
Message-ID: <1468855122279-5912464.post@n5.nabble.com> (raw)
List-Unsubscribe: <mailto:majordomo@postgresql.org?body=unsub%20pgsql-sql>

I have a simple query select on the hstore attribute "EMAIL_ADDRESS". but the
thing is i'm using a parameter in the query to specify which hstore
attribute I want to access, and when using a parameter the index which I
created is suppressed; whereas when I hard code the attribute
"EMAIL_ADDRESS" then the index is used. this is the index I created:

create index indx_email on contact using btree
((contact_attributes->'EMAIL_ADDRESS'::text));


the query is:

select * from contact where contact_attributes->$parameter =
"fqwefd@hotmail.com';


when I hardcode the attribute like below it the index is used.

select * from contact where contact_attributes->'EMAIL_ADDRESS' =
"fqwefd@hotmail.com';



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