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https://issues.apache.org/jira/browse/FLINK-4541?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15673479#comment-15673479
]
ASF GitHub Bot commented on FLINK-4541:
---------------------------------------
Github user fhueske commented on a diff in the pull request:
https://github.com/apache/flink/pull/2811#discussion_r88434958
--- Diff:
flink-libraries/flink-table/src/test/scala/org/apache/flink/api/scala/batch/sql/JoinITCase.scala
---
@@ -314,4 +315,18 @@ class JoinITCase(
val results = tEnv.sql(sqlQuery).toDataSet[Row].collect()
TestBaseUtils.compareResultAsText(results.asJava, expected)
}
+
+ @Test(expected = classOf[TableException])
+ def testCrossJoin(): Unit = {
--- End diff --
Good test to verify that we do not allow arbitrary cross joins!
> Support for SQL NOT IN operator
> -------------------------------
>
> Key: FLINK-4541
> URL: https://issues.apache.org/jira/browse/FLINK-4541
> Project: Flink
> Issue Type: Improvement
> Components: Table API & SQL
> Reporter: Timo Walther
> Assignee: Alexander Shoshin
>
> This should work:
> {code}
> def main(args: Array[String]): Unit = {
> // set up execution environment
> val env = ExecutionEnvironment.getExecutionEnvironment
> val tEnv = TableEnvironment.getTableEnvironment(env)
> val input = env.fromElements(WC("hello", 1), WC("hello", 1), WC("ciao",
> 1))
> // register the DataSet as table "WordCount"
> tEnv.registerDataSet("WordCount", input, 'word, 'frequency)
> tEnv.registerTable("WordCount2", tEnv.fromDataSet(input, 'word,
> 'frequency).select('word).filter('word !== "hello"))
> // run a SQL query on the Table and retrieve the result as a new Table
> val table = tEnv.sql("SELECT word, SUM(frequency) FROM WordCount WHERE
> word NOT IN (SELECT word FROM WordCount2) GROUP BY word")
> table.toDataSet[WC].print()
> }
> {code}
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