Query precision issue - Mailing list pgsql-general

From Sairam Krishnamurthy
Subject Query precision issue
Date
Msg-id 4CC5BA2F.8010202@gmail.com
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Responses Re: Query precision issue
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All,

I have simple query like 'select * from table1 where column1=-107.6898780000'. This returns an empty set. But there is data corresponding to this value of column.

When I looked more into it, it seems like a precision issue. The value for column1 is -107.689878.

More interesting is that the following query fetches the row,

'select * from table1 where column1=-107.689878000'

Note that there are only three trailing zeros in the second query while there were four in the first.

Can somebody help me to find out the problem? I can very well truncate the trailing zeros when querying, but I am interested in finding why an additional trailing zero returns an empty set.

-- 
Thanks,
Sairam Krishnamurthy	
+1 612 859 8161

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