Timo Walther created FLINK-4549:
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Summary: Test and document implicitly supported SQL functions
Key: FLINK-4549
URL: https://issues.apache.org/jira/browse/FLINK-4549
Project: Flink
Issue Type: Bug
Components: Table API & SQL
Reporter: Timo Walther
Calcite supports many SQL functions by translating them into {{RexNode}}s.
However, SQL functions like {{NULLIF}}, {{OVERLAPS}} are neither tested nor
document although supported.
These functions should be tested and added to the documentation. We could adopt
parts from the Calcite documentation.
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