[CALCITE-3881] SqlFunctions#addMonths yields incorrect results in som… #1890
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danny0405
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Mar 31, 2020
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…e corner case
SqlFunctions#addMonths use DateTimeUtils#ymdToUnixDate to calculate the JDN(julian day number). But in some corner cases it yields incorrent results. The root cause is: the algorithm of DateTimeUtils#ymdToUnixDate requires reasonable month(1 to 12)[1], but SqlFunctions#addMonths may pass in a month out of the reasonable range. This PR will fix it.