Re: how to get index scan at work?
От | Rajesh Kumar Mallah |
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Тема | Re: how to get index scan at work? |
Дата | |
Msg-id | 3CC046D4.B7F972A7@trade-india.com обсуждение исходный текст |
Ответ на | how to get index scan at work? (Rajesh Kumar Mallah <mallah@trade-india.com>) |
Ответы |
Re: how to get index scan at work?
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Список | pgsql-sql |
Hi Thomas, <p>it did not work for me! <p><tt><font color="#000099">tradein_clients=> explain SELECT email_id fromemail_bank where email ILIKE 'mallah@grex.org';</font></tt><br /><tt><font color="#000099">NOTICE: QUERY PLAN:</font></tt><br/><tt><font color="#000099">Seq Scan on email_bank (cost=0.00..22926.16 rows=1 width=4)</font></tt><br/><tt><font color="#000099">EXPLAIN</font></tt><br /><tt><font color="#000099">tradein_clients=>explain SELECT email_id from email_bank where email = 'mallah@grex.org';</font></tt><br/><tt><font color="#000099">NOTICE: QUERY PLAN:</font></tt><br /><tt><font color="#000099">IndexScan using email_bank_case_insen on email_bank (cost=0.00..4.83 rows=1 width=4)</font></tt><br /><tt><fontcolor="#000099">EXPLAIN</font></tt><br /><tt><font color="#000099">tradein_clients=></font></tt><br /> <p>btwi could not create the index the way you suggested <p>regds <p><tt>tradein_clients=> CREATE UNIQUE INDEX email_bank_case_insenon LOWER(email_bank(email));</tt><br /><b><tt><font color="#CC0000">ERROR: DefineIndex: relation "lower"not found</font></tt></b><br /><tt>tradein_clients=></tt><br />
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