Jacky Lau created FLINK-36399:
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             Summary: cast result is incorrect
                 Key: FLINK-36399
                 URL: https://issues.apache.org/jira/browse/FLINK-36399
             Project: Flink
          Issue Type: Bug
          Components: Table SQL / Planner
    Affects Versions: 2.0-preview
            Reporter: Jacky Lau
             Fix For: 2.0-preview


case:

configuration.set(
                ExecutionConfigOptions.TABLE_EXEC_LEGACY_CAST_BEHAVIOUR,
                ExecutionConfigOptions.LegacyCastBehaviour.ENABLED);

tableEnv.executeSql("SELECT CAST(CAST('100' AS DECIMAL(2, 0)) AS 
STRING)").print();

 

expected is null but it is empty string



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