godfrey he created FLINK-12079:
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Summary: Add support for generating optimized logical plan for
join on batch
Key: FLINK-12079
URL: https://issues.apache.org/jira/browse/FLINK-12079
Project: Flink
Issue Type: New Feature
Components: Table SQL / Planner
Reporter: godfrey he
Assignee: godfrey he
Currently, there are 3 types of batch physical join nodes:
{{BatchExecHashJoin}}, {{BatchExecSortMergeJoin}} and
{{BatchExecNestedLoopJoin}}. This issue aims to add rules to convert logical
join to appropriate physical join.
a logical join
* can be converted to {{BatchExecHashJoin}} if join keys are not empty and
ShuffleHashJoin or BroadcastHashJoin are enabled,
* can be converted to {{BatchExecSortMergeJoin}} if join keys are not empty and
SortMergeJoin is enabled,
* can be converted to {{BatchExecNestedLoopJoinRule}} if NestedLoopJoin is
enabled or one of join input sides returns at most a single row.
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