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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