[jira] [Created] (HIVE-8810) Make HashTableSinkOperator works for Spark Branch [Spark Branch]

["Chao (JIRA)" <ji...@apache.org>]

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 But, since later on we use separate {{HashTableSinkOperator}} for each small table, that information is no longer valid, and thus this method will fail.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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