Haohui Mai created FLINK-7159:
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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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