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As far as I know, 2) is correct - for a given file, the buffer size will
always include space for the 'before' and 'after' images, even if the data
may not be initialized (so the before image won't be initialized for an
INSERT, for instance).
I remember asking this before to an IBM engineer when I opened a PMR about
adding the calling program name to the trigger buffer (to avoid us having to
call QWVRCSTK to get it). This was a few years ago, but in our discussions,
he said that memory is allocated by DBM for the full size of the trigger
buffer, including both images, even though only one of those images might be
initialized.
Nothing ever came of adding the calling program name of the trigger buffer,
by the way :-(
Rory
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