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On 22/08/2008, at 8:36 AM, Pete Helgren wrote:

I thought DDS had broader implications than just in RPG programs.

It does. It affects COBOL and C programs too as long as they, like RPG, specify keyed processing.

Query products can choose to use the keyed access path just like HLLs. Whether a Query product uses arrival sequence or keyed sequence depends on how it estimates the result. You can provide hints or help to get a Query product to favour keyed over arrival for reading but you can't force it.

You can force the order of the query result but that is different from an HLL where you force the order of the input (and get an ordered result as a by-product)

Regards,
Simon Coulter.
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