When PowerExchange executed SQL with a WHERE clause against data for Adabas, Datacom, IDMS, IMS or KSDS, the NRDB optimized reading process discarded a condition .The condition is still used for post-read qualification. PowerExchange only accepts basic conditions such as GE/GT, LE/LT, EQ/NE, BETWEEN, or LIKE. The condition cannot contain the NULL operator.
Processing continues, but the skipped condition causes too many records to be read, which causes slower overall processing.
If possible, construct the SQL WHERE clause condition in a manner that the optimized reading process can use. This message can be suppressed using the REPORT_UNUSED_OPT_READING_CONDITIONS=N parameter.
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