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https://issues.apache.org/jira/browse/FLINK-5520?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15829901#comment-15829901
]
ASF GitHub Bot commented on FLINK-5520:
---------------------------------------
Github user fhueske commented on a diff in the pull request:
https://github.com/apache/flink/pull/3141#discussion_r96843797
--- Diff:
flink-libraries/flink-table/src/test/scala/org/apache/flink/table/api/scala/batch/sql/JoinITCase.scala
---
@@ -375,4 +395,62 @@ class JoinITCase(
Assert.assertEquals(0, result)
}
+
+ @Test(expected = classOf[TableException])
+ def testRightOuterJoinWithNonEquiJoinPredicate(): Unit = {
+
+ val env = ExecutionEnvironment.getExecutionEnvironment
+ val tEnv = TableEnvironment.getTableEnvironment(env, config)
+ tEnv.getConfig.setNullCheck(true)
+
+ val sqlQuery = "SELECT c, g FROM Table3 RIGHT OUTER JOIN Table5 ON b =
e and a > d"
+
+ val ds1 =
CollectionDataSets.getSmall3TupleDataSet(env).toTable(tEnv).as('a, 'b, 'c)
+ val ds2 =
CollectionDataSets.get5TupleDataSet(env).toTable(tEnv).as('d, 'e, 'f, 'g, 'h)
+ tEnv.registerTable("Table3", ds1)
+ tEnv.registerTable("Table5", ds2)
+
+ tEnv.sql(sqlQuery).toDataSet[Row].collect()
+
+ val results = tEnv.sql(sqlQuery).toDataSet[Row].collect()
--- End diff --
This line can be removed
> 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
> Assignee: lincoln.lee
> 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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