[jira] [Created] (FLINK-11960) Check all the builtin functions and operators are reasonable

[Jark Wu (JIRA)]

Jark Wu created FLINK-11960:
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             Summary: Check all the builtin functions and operators are 
reasonable
                 Key: FLINK-11960
                 URL: https://issues.apache.org/jira/browse/FLINK-11960
             Project: Flink
          Issue Type: Task
          Components: API / Table SQL
            Reporter: Jark Wu


We introduced a lot of functions and operators in 
{{flink-table-planner-blink}}. Most of them are not discussed in the community, 
some of them may break the behavior of current Flink SQL.

We should re-visit the functions and operators to accept the reasonable ones 
and remove the un-standard ones.

Here is a list of all the Blink SQL functions and operators: 
https://github.com/apache/flink/blob/master/flink-table/flink-table-planner-blink/src/main/java/org/apache/flink/table/functions/sql/FlinkSqlOperatorTable.java



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