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From "xuxc1120" <xuxc1...@vip.qq.com>
Subject Re: RE: how to use index for this query situation?
Date Thu, 30 Oct 2014 08:22:55 GMT
the where conditions are all have index,e.g (col2=1 and col3=1 .  col1 to coln all have local
indexes),
when :
select col2 from table where col2=1 and col3=1, it will full scan the table;‍
 only if one condition after "where" clause, it will scan the index_table;


------------------ Original ------------------
From:  "rajeshbabu chintaguntla";<rajeshbabu.chintaguntla@huawei.com>;
Date:  Thu, Oct 30, 2014 04:12 PM
To:  "user@phoenix.apache.org"<user@phoenix.apache.org>; 

Subject:  RE: how to use index for this query situation?



 If you have where condition on non indexed column then we go for full table scan. 
 
 Can you confirm this?
 
 
 Thanks.
 Rajeshbabu.
 
   
 
 
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 From: xuxc1120 [xuxc1120@vip.qq.com]
 Sent: Thursday, October 30, 2014 1:20 PM
 To: user
 Subject: how to use index for this query situation?
 
 
 
  table:
 each col with local index(col1......coln), 
 when i select data such as :
 select col1,col2 from table where col1="test", the index works,
 but if there are 2 or more conditions after "where" clause,the query will full scan the table;
 is there any way to use index for such query?
 
 
 thanks.
 xuxc
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