Jark Wu created FLINK-13648:
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Summary: Support "IS NOT DISTINCT FROM" operator in lookup join
Key: FLINK-13648
URL: https://issues.apache.org/jira/browse/FLINK-13648
Project: Flink
Issue Type: New Feature
Components: Table SQL / Planner
Reporter: Jark Wu
Assignee: 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 not expected.Because
LookupJoin does not handle the case correctly.
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