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Posted to issues@flink.apache.org by "Hequn Cheng (JIRA)" <ji...@apache.org> on 2019/01/13 07:51:00 UTC
[jira] [Created] (FLINK-11310) Convert predicates to IN or NOT_IN
for Project
Hequn Cheng created FLINK-11310:
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Summary: Convert predicates to IN or NOT_IN for Project
Key: FLINK-11310
URL: https://issues.apache.org/jira/browse/FLINK-11310
Project: Flink
Issue Type: Improvement
Components: Table API & SQL
Reporter: Hequn Cheng
Assignee: Hequn Cheng
In FLINK-10474, we force translate IN into a predicate to avoid translating to a JOIN. In addition, we add a Rule to convert the predicates back to IN so that we can generate code using a HashSet for the IN.
However, FLINK-10474 only takes Filter into consideration. It would be great to also convert predicates in Project to IN. It not only will improve the performance for the Project, but also will address the problem raised in FLINK-11308, as all predicates will be converted into one IN expression.
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