Chao created HIVE-8810:
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Summary: Make HashTableSinkOperator works for Spark Branch [Spark
Branch]
Key: HIVE-8810
URL: https://issues.apache.org/jira/browse/HIVE-8810
Project: Hive
Issue Type: Sub-task
Components: Spark
Affects Versions: spark-branch
Reporter: Chao
In MR, all small tables for a particular MJ operator share the same instance of
{{HashTableSinkOperator}}, while in Spark branch, each small table corresponds
to a different {{HashTableSinkOperator}} instance. This difference causes some
issues.
For instance, in {{HashTableSinkOperator#processOp}}, it uses a tag to look for
information in various data structures, such as {{joinKeys}}, {{filterMaps}},
{{joinValues}}, etc. Those data structures stores the information BEFORE it
splits the MJ operator with its parents. But, since later on we use separate
{{HashTableSinkOperator}} for each small table, that information is no longer
valid, and thus this method will fail.
This JIRA is to track and solve these related issues.
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