Jingsong Lee created FLINK-16165:
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Summary: NestedLoopJoin fallback to HashJoin when build records
number is very large
Key: FLINK-16165
URL: https://issues.apache.org/jira/browse/FLINK-16165
Project: Flink
Issue Type: Improvement
Components: Table SQL / Planner
Reporter: Jingsong Lee
Fix For: 1.11.0
Now, if the statistic is not so accurate, maybe choose wrong join type to
nested loop join.
If build records number is very large, this lead to very slow join, the user
looks like the join is in Hang.
It is a stability problem, We should fallback to hash join in runtime to avoid
this hang.
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