public AggregationScanner(
CoprocessorRowType type,
CoprocessorFilter filter,
CoprocessorProjector groupBy,
ObserverAggregators aggrs,
RegionScanner innerScanner,
ObserverBehavior behavior)
throws IOException {
AggregateRegionObserver.LOG.info("Kylin Coprocessor start");
this.behavior = behavior;
ObserverAggregationCache aggCache;
Stats stats = new Stats();
aggCache = buildAggrCache(innerScanner, type, groupBy, aggrs, filter, stats);
stats.countOutputRow(aggCache.getSize());
this.outerScanner = aggCache.getScanner(innerScanner);
AggregateRegionObserver.LOG.info("Kylin Coprocessor aggregation done: " + stats);
}
