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  3. February 2011

RE: relational database

I really do not think that the S/36, S/34 and their predecessors qualify
as relational database machines simply because they supported a chain by a
key instead of just RRN in RPG.

Do you really think the data below is relational?
A0000100012345Bubba 1313 Mockingbird Lane New York NY12345
A00001001XYZ123Steel Coil ...

Hey, I can chain to the first key by order number 00001 and line number
000 (indicates header record). And I can chain to the second by order
number 00001 and line number 001 (>0 indicates a detail line). Who needs
externally defined files? Apparently that's not even required to be
considered a relational system. Just an ability to chain by a key instead
of a RRN.

Rob Berendt

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