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  2. RPG400-L
  3. March 2013

Re: CHAIN on a Partial Key

On Wed, Mar 27, 2013 at 5:50 PM, John Yeung <gallium.arsenide@xxxxxxxxx> wrote:
The access path is determined by the F-spec. It wouldn't make sense
for the access path to change depending on how many keys your CHAIN
happens to specify. You can choose an access path that uses all of
the keys or none of them.

To be clear, you can ONLY choose an access path that uses all of the
keys or none of them.

The "partial key, then arrival sequence" access path is patently
false. (No need to assume this; you can verify it yourself by
creating some data and writing a program.)

John

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