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Posted to issues@calcite.apache.org by "Liya Fan (Jira)" <ji...@apache.org> on 2020/10/29 06:46:00 UTC

[jira] [Created] (CALCITE-4363) Need a utility to check if a SQL operator is standard

Liya Fan created CALCITE-4363:
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             Summary: Need a utility to check if a SQL operator is standard
                 Key: CALCITE-4363
                 URL: https://issues.apache.org/jira/browse/CALCITE-4363
             Project: Calcite
          Issue Type: Wish
          Components: core
            Reporter: Liya Fan
            Assignee: Liya Fan


Currently, all standard SQL operators are defined in SqlStdOperatorTable.java as static members, not as enums. This makes it difficult to check if a SQL function is a standard one. 

In many scenarios, we need such a check. For example, some optimizations can be performed, if we know the function is standard (not user-defined), because user-defined functions may have some unknown side-effects.

To support the check, we only need to maintain a set that contains all standard operators. 

Do you think such a utility should be supported?

 



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