Sort Sequence for Lock Descriptors [ TurboIMAGE/XL Database Management System Reference Manual ] MPE/iX 5.0 Documentation
TurboIMAGE/XL Database Management System Reference Manual
Sort Sequence for Lock Descriptors
TurboIMAGE/XL internally sorts the lock descriptors in the order as
follows:
* Ascending data set number
* Lower bound of data item value for each data set number
If a lock descriptor's relative operator (relop) field contains <=, it
collates before any other lock descriptors for the data set because it
has the lowest possible lower bound for its value. For example, a lock
descriptor of SALES:QUANTITY <= 10 collates before a lock descriptor of
SALES:QUANTITY = 5, because the lower bound of the former is the lowest
possible integer for an I-type data item.
MPE/iX 5.0 Documentation