[jira] [Created] (FLINK-18731) The monotonicity of UNIX_TIMESTAMP function is not correct

[Shang Yuanchun (Jira)]

godfrey he created FLINK-18731:
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             Summary: The monotonicity of UNIX_TIMESTAMP function is not correct
                 Key: FLINK-18731
                 URL: https://issues.apache.org/jira/browse/FLINK-18731
             Project: Flink
          Issue Type: Bug
          Components: Table SQL / Planner
            Reporter: godfrey he
             Fix For: 1.12.0


Currently, the monotonicity of {{UNIX_TIMESTAMP}} function is always {{INCREASING}}, actually, when it has empty function arguments ({{UNIX_TIMESTAMP()}}, is equivalent to {{NOW}}), its monotonicity is INCREASING. otherwise its monotonicity should be NOT_MONOTONIC. (e.g. UNIX_TIMESTAMP(string))



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