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Posted to issues@flink.apache.org by "Jark Wu (Jira)" <ji...@apache.org> on 2019/10/21 07:31:00 UTC

[jira] [Created] (FLINK-14473) Support nested field as the rowtime attribute

Jark Wu created FLINK-14473:
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             Summary: Support nested field as the rowtime attribute
                 Key: FLINK-14473
                 URL: https://issues.apache.org/jira/browse/FLINK-14473
             Project: Flink
          Issue Type: Sub-task
          Components: Table SQL / API, Table SQL / Planner
            Reporter: Jark Wu


As described in FLIP-66, in theory, the expected rowtime field can be a nested field in schema. But this requires a big refactoring for current planner, because planner assumes that time attribute can only be top-level, and all the time indicator is represented as a single integer.

All of them need to be refactored, using a new structure to represent the position of time attribute, and a generated function to access the time attribute. 

Btw, this is not a blocker of FLIP-66, because users can use computed column to access the nested fields in DDL to avoid defining a nested time attribute. 



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