Jingsong Lee created FLINK-12611:
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Summary: Make time indicator nullable in blink
Key: FLINK-12611
URL: https://issues.apache.org/jira/browse/FLINK-12611
Project: Flink
Issue Type: Improvement
Components: Table SQL / Planner
Reporter: Jingsong Lee
Assignee: Jingsong Lee
SQL: select max(rowtime), count(a) from T
There will be a AssertionError: type mismatch:
aggCall type:
TIMESTAMP(3) NOT NULL
inferred type:
TIMESTAMP(3)
Agg type checking is done before TimeIndicator materializes. So there is a
exception.
And before introducing nullable of LogicalType, we should modify this to avoid
more potential TypeCheck problems.
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