Fabian Hueske created FLINK-5520:
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Summary: Disable outer joins with non-equality predicates
Key: FLINK-5520
URL: https://issues.apache.org/jira/browse/FLINK-5520
Project: Flink
Issue Type: Bug
Components: Table API & SQL
Affects Versions: 1.2.0
Reporter: Fabian Hueske
Priority: Blocker
Fix For: 1.2.0
Outer joins with non-equality predicates (and at least one equality predicate)
compute incorrect results.
Since this is not a very common requirement, I propose to disable this feature
for the 1.2.0 release and correctly implement it for a later version.
The fix should add checks in the Table API validation phase (to get a good
error message) and in the DataSetJoinRule to prevent translation of SQL queries
with non-equality predicates on outer joins.
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