Jingsong Lee created FLINK-12094:
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Summary: Introduce sort merge join operator to blink batch
Key: FLINK-12094
URL: https://issues.apache.org/jira/browse/FLINK-12094
Project: Flink
Issue Type: New Feature
Components: Table SQL / Runtime
Reporter: Jingsong Lee
Assignee: Jingsong Lee
Introduce SortMergeJoinOperator: An implementation that realizes the joining
through a sort-merge join strategy.
Support all sql types: INNER, LEFT, RIGHT, FULL, SEMI, ANTI
1.In most cases, its performance is weaker than HashJoin.
2.It is more stable than HashJoin, and most of the data can be sorted stably.
3.SortMergeJoin should be the best choice if sort can be omitted in the case of
multi-level join cascade with the same key.
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