Jark Wu created FLINK-15441:
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Summary: Refactor StreamExecWindowJoin to extends
CommonPhysicalJoin
Key: FLINK-15441
URL: https://issues.apache.org/jira/browse/FLINK-15441
Project: Flink
Issue Type: Improvement
Components: Table SQL / Planner
Reporter: Jark Wu
Currently, {{StreamExecWindowJoin}} put join keys in the {{remainCondition}},
this will generate redundant condition for join keys, and results in [this code
branch
|https://github.com/apache/flink/blob/master/flink-table/flink-table-planner-blink/src/main/scala/org/apache/flink/table/planner/plan/utils/WindowJoinUtil.scala#L128]
is never reached.
I better desgin is have a new {{joinCondition}} which removes the window bounds
condition, and generate condition for non-equal conditions in
{{joinCondition}}, and make {{StreamExecWindowJoin}} extends
{{CommonPhysicalJoin}} . We should also take filter null join keys into
account.
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