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  3. May 2006

RE: PK's enforced via constraint or unique indexes?

>DDS described keyed logical files can share access path with an SQL
defined index

My guess, and it is just a guess, it that SQL indices are actually in
FIFO order, not undefined. And if you look at the documentation on index
sharing w/DDS it only comes into play if FIFO, LIFO or FCFO is NOT
specified. Otherwise you need an exact match. That is, think of FxFO as
the last key. Since it's there in SQL you have two indices:

Fld1+Fld2+Fld3+FIFO
Fld1+Fld2+FIFO

Where in dds you have

Fld1+Fld2+Fld3
Fld1+Fld2

Thus sharing can occur. 

-Walden

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