[jira] [Created] (FLINK-22336) [umbrella] Enhance testing for built-in functions

[Shang Yuanchun (Jira)]

Jingsong Lee created FLINK-22336:
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             Summary: [umbrella] Enhance testing for built-in functions
                 Key: FLINK-22336
                 URL: https://issues.apache.org/jira/browse/FLINK-22336
             Project: Flink
          Issue Type: Test
          Components: Table SQL / Runtime
            Reporter: Jingsong Lee
             Fix For: 1.14.0


We can complement the testing for existing functions, from the following aspects:
 * test all support types
 * test normal value, random value, extreme value and illegal value of parameters
 * test null value of parameters
 * test return null value



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