Github user fhueske commented on a diff in the pull request:
https://github.com/apache/flink/pull/1981#discussion_r63257292
--- Diff:
flink-libraries/flink-table/src/test/scala/org/apache/flink/api/scala/batch/table/JoinITCase.scala
---
@@ -271,4 +270,86 @@ class JoinITCase(mode: TestExecutionMode) extends
MultipleProgramsTestBase(mode)
ds1.join(ds2).where('b === 'e).select('c, 'g)
}
+ @Test
+ def testLeftJoinWithMultipleKeys(): Unit = {
+ val env: ExecutionEnvironment =
ExecutionEnvironment.getExecutionEnvironment
+ val tEnv = TableEnvironment.getTableEnvironment(env)
+ tEnv.getConfig.setNullCheck(true)
+
+ val ds1 = CollectionDataSets.get3TupleDataSet(env).toTable(tEnv, 'a,
'b, 'c)
+ val ds2 = CollectionDataSets.get5TupleDataSet(env).toTable(tEnv, 'd,
'e, 'f, 'g, 'h)
+
+ val joinT = ds1.leftOuterJoin(ds2, 'a === 'd && 'b === 'h).select('c,
'g)
+
+ val expected = "Hi,Hallo\n" + "Hello,Hallo Welt\n" + "Hello
world,Hallo Welt wie gehts?\n" +
+ "Hello world,ABC\n" + "Hello world, how are you?,null\n" + "I am
fine.,HIJ\n" +
+ "I am fine.,IJK\n" + "Luke Skywalker,null\n" + "Comment#1,null\n" +
"Comment#2,null\n" +
+ "Comment#3,null\n" + "Comment#4,null\n" + "Comment#5,null\n" +
"Comment#6,null\n" +
+ "Comment#7,null\n" + "Comment#8,null\n" + "Comment#9,null\n" +
"Comment#10,null\n" +
+ "Comment#11,null\n" + "Comment#12,null\n" + "Comment#13,null\n" +
"Comment#14,null\n" +
+ "Comment#15,null\n"
+ val results = joinT.toDataSet[Row].collect()
+ TestBaseUtils.compareResultAsText(results.asJava, expected)
+ }
+
+ @Test
+ def testLeftJoinWithFilterInJoinCondition(): Unit = {
+ val env: ExecutionEnvironment =
ExecutionEnvironment.getExecutionEnvironment
+ val tEnv = TableEnvironment.getTableEnvironment(env)
+ tEnv.getConfig.setNullCheck(true)
+
+ val ds1 = CollectionDataSets.get3TupleDataSet(env).toTable(tEnv, 'a,
'b, 'c)
+ val ds2 = CollectionDataSets.get5TupleDataSet(env).toTable(tEnv, 'd,
'e, 'f, 'g, 'h)
+
+ val joinT = ds1.leftOuterJoin(ds2, 'a < 3 && 'b ===
'd.cast(TypeInformation.of(classOf[Long])))
--- End diff --
Can you change the query such that the result has a null field?
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