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ok, reasonable enough. so I change the opnqryf and the index to match each other better, while having the same results.
CREATE INDEX HISTRY4LA ON HISTRY4 (HPEROD, HITEM, LMRKTC)
and
OPNQRYF FILE((HISTRY4)) QRYSLT('HPEROD *EQ "06" *AND HITEM *NE 0 *AND LMRKTC *NE "00"') KEYFLD((HPEROD) (HITEM) (LMRKTC))
I ran again, and it says it considered my index, but rejected it because of reason 4. 4 - The cost to use this access path, as determined by the optimizer, was higher than the cost associated with the chosen access method.
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