[jira] [Created] (FLINK-13296) FunctionCatalog.lookupFunction() should check in memory functions if the target function doesn't exist in catalog

[Shang Yuanchun (Jira)]

Bowen Li created FLINK-13296:
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             Summary: FunctionCatalog.lookupFunction() should check in memory functions if the target function doesn't exist in catalog
                 Key: FLINK-13296
                 URL: https://issues.apache.org/jira/browse/FLINK-13296
             Project: Flink
          Issue Type: Sub-task
          Components: Table SQL / API
    Affects Versions: 1.9.0, 1.10.0
            Reporter: Bowen Li
            Assignee: Bowen Li
             Fix For: 1.9.0, 1.10.0


Currently the logic to lookup a function is check either the catalog or the in memory function. But the correct logic is to 1st check the catalog, and if the function doesn't exist there, check in memory functions. There should be a resolution order.

This is root cause of FLINK-13294



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