Hequn Cheng created FLINK-10956:
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Summary: Reuse same rexCall during codegen
Key: FLINK-10956
URL: https://issues.apache.org/jira/browse/FLINK-10956
Project: Flink
Issue Type: Improvement
Reporter: Hequn Cheng
Assignee: Hequn Cheng
Currently, same rexCalls have not been reused during codegen. I think we can
add some reuse logic to achieve a better performance. Take the following query
as an example:
{code:java}
t.select(func0('c), func0('c), func0('c))
{code}
The func0('c) is called three times for every input row. It would be nice if we
can reuse it. Any suggestions are appreciated.
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