Zou created FLINK-28691:
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Summary: Improve cache hit rate of generated class
Key: FLINK-28691
URL: https://issues.apache.org/jira/browse/FLINK-28691
Project: Flink
Issue Type: Sub-task
Components: Table SQL / Runtime
Reporter: Zou
In OLAP scenarios, compiling generated classes is very frequent, it will
consume a lot of CPU and large amount of generated classes will also takes up a
lot of space in metaspace, which will lead to frequent Full GC.
As we use a self-incrementing counter in CodeGenUtils#newName, it means we
could not get the same generated class between two queries even when they are
exactly the same. Maybe we could share the same generated class between
different queries if they has the same logic, it will be good for job latency
and resource consumption.
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