why ?????????

From: AK <oramagic_at_hotmail.com>
Date: Thu, 03 Apr 2003 15:58:51 -0800
Message-ID: <F001.00579F1F.20030403155851@fatcity.com>

If I execute a query like ,
select count(*) from some_table where 1=2 . why does oracle bothers to look at tables . Since there is only one condition which is false .

If I write a sql like

       select count(*) 
      from  some_table 
     where column_a= :a
     and a is not null;

it should not even go to look at table , but explain plan suggests that it does a index /table scan .

-ak

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Author: AK
  INET: oramagic_at_hotmail.com

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