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Note that likely one would want to use the following CREATE INDEX
instead:
CREATE INDEX lib.BIGREVENU2 ON lib.ITEM_FACT (SUPPKEY ASC,
decimal(QUANTITY * EXTENDEDPRICE, 15, 2) as QuanXtnd ASC)
/* WHERE decimal(QUANTITY * EXTENDEDPRICE, 15, 2) > 100000 */
RCDFMT BSUPPREV ADD QUANTITY, EXTENDEDPRICE, REVENUE...
Thus the expression is cast to a known type of desirable scale and
precision [typically to match attributes of a keyed field for another
TABLE; in this case more likely for what is best as input to a HLL pgm],
plus the expression gets a specific versus _generated_ column name. The
selection could be eliminated, as comment removes in the above, to make
the index potentially valuable outside of those queries with that more
limited selection.
Regards, Chuck
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