[jira] [Created] (FLINK-4655) Add tests for validation of Expressions

[Shang Yuanchun (Jira)]

Timo Walther created FLINK-4655:
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             Summary: Add tests for validation of Expressions
                 Key: FLINK-4655
                 URL: https://issues.apache.org/jira/browse/FLINK-4655
             Project: Flink
          Issue Type: Test
          Components: Table API & SQL
            Reporter: Timo Walther


Currently, it is only tested if Table API expressions work if the input is correct. The validation method of expressions is not tested. The {{ExpressionTestBase}} should be extended to provide means to also test invalid expressions.



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