How to use

enableStreamAggregate

method

in

org.apache.kylin.storage.StorageContext

private void enableStreamAggregateIfBeneficial(Cuboid cuboid, Set<TblColRef> groupsD, StorageContext context) {
  CubeDesc cubeDesc = cuboid.getCubeDesc();
  boolean enabled = cubeDesc.getConfig().isStreamAggregateEnabled();
  Set<TblColRef> shardByInGroups = Sets.newHashSet();
  for (TblColRef col : cubeDesc.getShardByColumns()) {
    if (groupsD.contains(col)) {
      shardByInGroups.add(col);
    }
  }
  if (!shardByInGroups.isEmpty()) {
    enabled = false;
    logger.debug("Aggregate partition results is not beneficial because shard by columns in groupD: {0}",
         shardByInGroups);
  }
  if (!context.isNeedStorageAggregation()) {
    enabled = false;
    logger.debug("Aggregate partition results is not beneficial because no storage aggregation");
  }
  if (enabled) {
    context.enableStreamAggregate();
  }
}

private void enableStreamAggregateIfBeneficial(Cuboid cuboid, Set<TblColRef> groupsD, StorageContext context) {
  CubeDesc cubeDesc = cuboid.getCubeDesc();
  boolean enabled = cubeDesc.getConfig().isStreamAggregateEnabled();
  Set<TblColRef> shardByInGroups = Sets.newHashSet();
  for (TblColRef col : cubeDesc.getShardByColumns()) {
    if (groupsD.contains(col)) {
      shardByInGroups.add(col);
    }
  }
  if (!shardByInGroups.isEmpty()) {
    enabled = false;
    logger.debug("Aggregate partition results is not beneficial because shard by columns in groupD: {0}",
         shardByInGroups);
  }
  if (!context.isNeedStorageAggregation()) {
    enabled = false;
    logger.debug("Aggregate partition results is not beneficial because no storage aggregation");
  }
  if (enabled) {
    context.enableStreamAggregate();
  }
}