[jira] [Created] (FLINK-7159) Semantics of OVERLAPS in Table API diverge from the SQL standard

["Haohui Mai (JIRA)" <ji...@apache.org>]

Haohui Mai created FLINK-7159:
---------------------------------

             Summary: Semantics of OVERLAPS in Table API diverge from the SQL standard
                 Key: FLINK-7159
                 URL: https://issues.apache.org/jira/browse/FLINK-7159
             Project: Flink
          Issue Type: Bug
            Reporter: Haohui Mai
            Assignee: Haohui Mai


According to http://web.cecs.pdx.edu/~len/sql1999.pdf

ISO/IEC 9075-2:1999 (E) ©ISO/IEC, 8.12 <overlaps predicate>

{noformat}
The result of the <overlaps predicate> is the result of the following expression:
( S1 > S2 AND NOT ( S1 >= T2 AND T1 >= T2 ) )
OR
( S2 > S1 AND NOT ( S2 >= T1 AND T2 >= T1 ) )
OR
( S1 = S2 AND ( T1 <> T2 OR T1 = T2 ) )
{noformat}

The Table API diverges from this semantic.



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