This operator can be use to set/update the meta data for the stream elements.
Parameter:
METAATTRIBUTE: The meta data that should be used from now. This can be a single String or a List of Strings. Be aware that not all combinations of meta data are available.
Remark: This will update the whole meta data. If you want to add an additional meta data you must also repeat the existing meta data, the existing values are retained.
Example:
#PARSER PQL
#RUNQUERY
timer2 = TIMER({PERIOD = 2000, TIMEFROMSTART = true, SOURCE = 'source6', METAATTRIBUTE = 'TimeInterval'})
out = SELECT({PREDICATE = 'time > 0 && TimeInterval.start > 0'},timer2)
out2a = METADATA({METAATTRIBUTE = 'TimeIntervalLatencyDatarateSystemLoad'},out)