Support offset in composite aggs (backport of #50609) #50808
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Adds support for the `offset` parameter to the `date_histogram` source of composite aggs. The `offset` parameter is supported by the normal `date_histogram` aggregation and is useful for folks that need to measure things from, say, 6am one day to 6am the next day. This is implemented by creating a new `Rounding` that knows how to handle offsets and delegates to other rounding implementations. That implementation doesn't fully implement the `Rounding` contract, namely `nextRoundingValue`. That method isn't used by composite aggs so I can't be sure that any implementation that I add will be correct. I propose to leave it throwing `UnsupportedOperationException` until I need it. Closes elastic#48757
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Adds support for the
offsetparameter to thedate_histogramsourceof composite aggs. The
offsetparameter is supported by the normaldate_histogramaggregation and is useful for folks that need tomeasure things from, say, 6am one day to 6am the next day.
This is implemented by creating a new
Roundingthat knows how tohandle offsets and delegates to other rounding implementations. That
implementation doesn't fully implement the
Roundingcontract, namelynextRoundingValue. That method isn't used by composite aggs so I can'tbe sure that any implementation that I add will be correct. I propose to
leave it throwing
UnsupportedOperationExceptionuntil I need it.Closes #48757