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  2. RPG400-L
  3. February 2011

Re: More efficient way to write this SQL Statement???

<<Slapping forehead>>

Thanks Chuck!



On Fri, Feb 11, 2011 at 4:30 PM, CRPence <CRPbottle@xxxxxxxxx> wrote:
On 2/11/11 5:43 AM, Charles Wilt wrote:
<<SNIP>>

 where
      (tadr3 = '' or tadr3 = :cszESTCity)
  and (tste  = '' or tste  = :cszESTState)

OnThu, Feb 10, 2011 at 4:59 PM, Bryce Martin wrote:
I have a static sql statement I'm using in an SQLRPGLE program. It
takes about 20 seconds to execute and I need to make it faster if
at all possible...any suggestions will be greatly appreciated...
<<SNIP>>


  While unlikely to assist for performance, all of those predicates in
the above form [in parentheses], are easily rewritten having used the IN
predicate instead.  The following two logical expressions are
equivalent, and IMO using the IN predicate is "prettier" for not having
to repeat the field name:

   ( SpecificField = ''  OR  SpecificField = :SomeVariable )

   SpecificField IN ( '', :SomeVariable )

Regards, Chuck

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