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Well, now that I've had a chance to start tracing it, I know a bit more.
So far, everything where I've put breakpoints is completely identical
between the DDS and SQL versions of the logical, up to the point where
it crashes on the READ-equivalent CALLX.
To answer some of the questions that have come up:
In both cases, we are positioning by RRN.
The MCH1825 is sent from "DbDsiCursor," instruction 001EB8 to
"QDBGETSQ," instruction 0C30.
The CPF5147 has reason code 2, and is sent from QDBSIGEX, instruction
0539, to my MI program, at the READ-equivalent CALLX.
Looking at a DSPFD of the SQL view, I find that the CREATE VIEW seems
unremarkable; the select is via a "WHERE LPYSTO = 'D'" clause.
It seems that if I initially go to a RRN that satisfies the WHERE
clause, I can do whatever I want without crashing, EXCEPT either go to
the beginning of the file, or go explicitly to a RRN that doesn't
satisfy the WHERE clause.
I'm continuing to dig through the code, attempting to find out if there
are any differences in what happens between the SETLL-equivalent and the
READ-equivalent.
--
JHHL
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