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ASF GitHub Bot commented on FLINK-3943: --------------------------------------- Github user fhueske commented on a diff in the pull request: https://github.com/apache/flink/pull/2169#discussion_r69048442 --- Diff: flink-libraries/flink-table/src/test/scala/org/apache/flink/api/scala/batch/table/SetOperationsITCase.scala --- @@ -61,14 +62,28 @@ class UnionITCase( val ds1 = CollectionDataSets.getSmall3TupleDataSet(env).toTable(tEnv, 'a, 'b, 'c) val ds2 = CollectionDataSets.getSmall3TupleDataSet(env).toTable(tEnv, 'a, 'b, 'c) - val unionDs = ds1.union(ds2).select('c) + val minusDs = ds1.union(ds2).select('c) --- End diff -- Why this change? > Add support for EXCEPT (set minus) > ---------------------------------- > > Key: FLINK-3943 > URL: https://issues.apache.org/jira/browse/FLINK-3943 > Project: Flink > Issue Type: New Feature > Components: Table API & SQL > Affects Versions: 1.1.0 > Reporter: Fabian Hueske > Assignee: Ivan Mushketyk > Priority: Minor > > Currently, the Table API and SQL do not support EXCEPT. > EXCEPT can be executed as a coGroup on all fields that forwards records of > the first input if the second input is empty. > In order to add support for EXCEPT to the Table API and SQL we need to: > - Implement a {{DataSetMinus}} class that translates an EXCEPT into a DataSet > API program using a coGroup on all fields. > - Implement a {{DataSetMinusRule}} that translates a Calcite {{LogicalMinus}} > into a {{DataSetMinus}}. > - Extend the Table API (and validation phase) to provide an except() method. -- This message was sent by Atlassian JIRA (v6.3.4#6332)