[jira] [Created] (FLINK-13509) Support `is not distinct from ` and similar syntax in LookupJoin

["Jing Zhang (JIRA)" <ji...@apache.org>]

Jing Zhang created FLINK-13509:
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             Summary: Support `is not distinct from ` and similar syntax in LookupJoin
                 Key: FLINK-13509
                 URL: https://issues.apache.org/jira/browse/FLINK-13509
             Project: Flink
          Issue Type: Task
          Components: Table SQL / Planner
    Affects Versions: 1.10.0
            Reporter: Jing Zhang
             Fix For: 1.10.0


Example1:
{code:java}
`SELECT T.id, T.len, T.content, D.name FROM T JOIN userTable for system_time as of T.proctime AS D ON T.id = D.id OR (T.id is null and D.id is null)`
{code}

Example2:
{code:java}
"SELECT T.id, T.len, T.content, D.name FROM T JOIN userTable for system_time as of T.proctime AS D ON T.id IS NOT  DISTINCT FROM  D.id"
{code}

Now run the above sql in Blink planner, the results are error.Because LookupJoin does not handle the case correctly.

Here is plan:
In 1.9 version, simply throw exception in compile phase for the above sql.
Support the feature in 1.10 version.




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