In order to be able to apply windowing on top of results from MATCH_RECOGNIZE clause we have to provide a way to return proper TimeIndicator. We cannot simply return rowtime/proctime for any row of the match, cause match can be finalized e.g. by the first non matching row (in case of greedy), so the TimeIndicator will be equal to the timestamp of that non-matching row.
The suggestion is to provide functions:
that will output rowtime/proctime indicators.