Re: problem: index on number not honoured

From: Roland Roberts <roland(at)astrofoto(dot)org>
To: "Ilker Egilmez" <ilker(at)gate5(dot)de>
Cc: pgsql-sql(at)postgresql(dot)org
Subject: Re: problem: index on number not honoured
Date: 2001-11-15 16:26:41
Message-ID: m2k7wsgfum.fsf@tycho.rlent.pnet
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>>>>> "Ilker" == Ilker Egilmez <ilker(at)gate5(dot)de> writes:

Ilker> an index on a table column of any number type only gets honoured if you
Ilker> query it like a string, e.g.

Ilker> create table t1 ( n int2 ) ;

Ilker> create index t1n on t1 (n) ;

Ilker> explain select * from t1 where n = 1 ;

Ilker> -- Seq Scan on t1 (cost=0.00..22.50 rows=10 width=2)

Ilker> explain select * from t1 where n = '1' ;

Ilker> -- Index Scan using t1n on t1 (cost=0.00..8.14 rows=10 width=2)

Two questions: have you run vacuum analyze on the table? have you
submitted a bug report?

roland
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Roland B. Roberts, PhD RL Enterprises
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