From: Mintoo Lall <tlqmail@yahoo.com>
To: pgsql-sql@postgresql.org
Subject: Using UPPER and TRIM (INDEX usage)
Date: Sun, 25 May 2003 19:48:29 -0700 (PDT)
Message-ID: <20030526024829.32935.qmail@web40204.mail.yahoo.com> (raw)
Hi Everybody,
How do I use "TRIM" and "UPPER" both in the SQL statement and still use the index.
I created an index on myTable in the following way
CREATE INDEX index_fname_myTable ON myTable USING btree (upper(fname));
Now the SQL I used was
SELECT * FROM myTable where upper(trim(fname))= 'JOHN':: character varying
The postgresql doesnt use the index on fname in the above case.
But if I use only "UPPER" in the SQL statement, the postgresql uses the index. For eg. SELECT * FROM myTable where upper(fname)= 'JOHN':: character varying
Any help is appreciated.
Regards
Mintoo
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To: pgsql-sql@postgresql.org
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Subject: Re: Using UPPER and TRIM (INDEX usage)
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