cryptoe commented on code in PR #15817:
URL: https://github.com/apache/druid/pull/15817#discussion_r1565177474
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extensions-core/multi-stage-query/src/main/java/org/apache/druid/msq/indexing/processor/SegmentGeneratorFrameProcessorFactory.java:
##########
@@ -57,41 +58,43 @@
import org.apache.druid.segment.incremental.RowIngestionMeters;
import org.apache.druid.segment.indexing.DataSchema;
import org.apache.druid.segment.indexing.TuningConfig;
+import org.apache.druid.segment.metadata.CentralizedDatasourceSchemaConfig;
import org.apache.druid.segment.realtime.appenderator.Appenderator;
import org.apache.druid.segment.realtime.appenderator.AppenderatorConfig;
import org.apache.druid.segment.realtime.appenderator.Appenderators;
import org.apache.druid.segment.realtime.appenderator.SegmentIdWithShardSpec;
import org.apache.druid.segment.writeout.SegmentWriteOutMediumFactory;
import org.apache.druid.sql.calcite.planner.ColumnMappings;
-import org.apache.druid.timeline.DataSegment;
import org.joda.time.Period;
import javax.annotation.Nullable;
import java.io.File;
-import java.util.HashSet;
import java.util.List;
import java.util.Objects;
-import java.util.Set;
import java.util.function.Consumer;
@JsonTypeName("segmentGenerator")
public class SegmentGeneratorFrameProcessorFactory
- implements FrameProcessorFactory<DataSegment, Set<DataSegment>,
List<SegmentIdWithShardSpec>>
+ implements FrameProcessorFactory<DataSegmentWithSchemas,
DataSegmentWithSchemas, List<SegmentIdWithShardSpec>>
Review Comment:
This effectifvely breaks backword compatibility of MSQ during rolling
upgrade.
https://github.com/apache/druid/blob/c72e69a8c8aff192a22f5f198e61722380832380/extensions-core/multi-stage-query/src/main/java/org/apache/druid/msq/exec/ControllerImpl.java#L908-L912
I suggest reverting the MSQ changes till we have a clear path forward
##########
extensions-core/multi-stage-query/src/main/java/org/apache/druid/msq/indexing/processor/SegmentGeneratorFrameProcessorFactory.java:
##########
@@ -57,41 +58,43 @@
import org.apache.druid.segment.incremental.RowIngestionMeters;
import org.apache.druid.segment.indexing.DataSchema;
import org.apache.druid.segment.indexing.TuningConfig;
+import org.apache.druid.segment.metadata.CentralizedDatasourceSchemaConfig;
import org.apache.druid.segment.realtime.appenderator.Appenderator;
import org.apache.druid.segment.realtime.appenderator.AppenderatorConfig;
import org.apache.druid.segment.realtime.appenderator.Appenderators;
import org.apache.druid.segment.realtime.appenderator.SegmentIdWithShardSpec;
import org.apache.druid.segment.writeout.SegmentWriteOutMediumFactory;
import org.apache.druid.sql.calcite.planner.ColumnMappings;
-import org.apache.druid.timeline.DataSegment;
import org.joda.time.Period;
import javax.annotation.Nullable;
import java.io.File;
-import java.util.HashSet;
import java.util.List;
import java.util.Objects;
-import java.util.Set;
import java.util.function.Consumer;
@JsonTypeName("segmentGenerator")
public class SegmentGeneratorFrameProcessorFactory
- implements FrameProcessorFactory<DataSegment, Set<DataSegment>,
List<SegmentIdWithShardSpec>>
+ implements FrameProcessorFactory<DataSegmentWithSchemas,
DataSegmentWithSchemas, List<SegmentIdWithShardSpec>>
Review Comment:
To have backward compatibility, you would need to have a pojo which can be
created from a the json deserialized version of `set<dataSegments>` since that
is sent over the wire.
Maybe something like
Set<DataSegmentPlus> where datasegmentplus extends datasegment.
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