Fabian Hueske created FLINK-3942:
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Summary: Add support for INTERSECT
Key: FLINK-3942
URL: https://issues.apache.org/jira/browse/FLINK-3942
Project: Flink
Issue Type: New Feature
Components: Table API
Affects Versions: 1.1.0
Reporter: Fabian Hueske
Priority: Minor
Currently, the Table API and SQL do not support INTERSECT.
INTERSECT can be executed as join on all fields.
In order to add support for INTERSECT to the Table API and SQL we need to:
- Implement a {{DataSetIntersect}} class that translates an INTERSECT into a
DataSet API program using a join on all fields.
- Implement a {{DataSetIntersectRule}} that translates a Calcite
{{LogicalIntersect}} into a {{DataSetIntersect}}.
- Extend the Table API (and validation phase) to provide an intersect() method.
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