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Posted to issues@flink.apache.org by "hailong wang (Jira)" <ji...@apache.org> on 2020/01/10 14:19:00 UTC

[jira] [Created] (FLINK-15556) Add a switch for PushProjectIntoTableSourceScanRule

hailong wang created FLINK-15556:
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             Summary: Add a switch for PushProjectIntoTableSourceScanRule
                 Key: FLINK-15556
                 URL: https://issues.apache.org/jira/browse/FLINK-15556
             Project: Flink
          Issue Type: Improvement
          Components: Table SQL / Planner
    Affects Versions: 1.10.0
            Reporter: hailong wang
             Fix For: 1.11.0


In some case, For the project push down, The  digest of tableSource maybe different. For example, If we create a jdbc tablesource, and is used twice after it for different column, the source can not be reused for the different digest. In this case, the query io will more precious, So we can add a switch to turn off project push down, and the reused the source.



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