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Dennis,

WHERE
char(myFileField) = :someValue;

Would require a full table scan

but

WHERE
myFileField = char(:someValue)

Does NOT.

Charles

On Tue, Oct 12, 2010 at 8:43 AM, Dennis Lovelady <iseries@xxxxxxxxxxxx> wrote:
It is considered bad form to put a function/formula on a WHERE clause since
that causes SQL to have to process the full table.  In this case, we would
be scanning a whole table in order to return one row!

Dennis Lovelady
http://www.linkedin.com/in/dennislovelady

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