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From "Jingsong Lee (JIRA)" <j...@apache.org>
Subject [jira] [Created] (FLINK-12611) Make time indicator nullable in blink
Date Fri, 24 May 2019 06:50:00 GMT
Jingsong Lee created FLINK-12611:

             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:
inferred type:

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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