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Posted to issues@flink.apache.org by "Timo Walther (JIRA)" <ji...@apache.org> on 2019/07/10 09:43:00 UTC

[jira] [Created] (FLINK-13191) Add a simplified UDF type extraction

Timo Walther created FLINK-13191:
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             Summary: Add a simplified UDF type extraction
                 Key: FLINK-13191
                 URL: https://issues.apache.org/jira/browse/FLINK-13191
             Project: Flink
          Issue Type: Sub-task
          Components: Table SQL / API
            Reporter: Timo Walther
            Assignee: Timo Walther


Currently, the input, accumulator, and output types of UDFs are partially defined within an UDF and outside of the UDF in language-specific table environments (Scala vs. Java). This makes UDFs environment-dependent and not modular. It also blocks the unified {{org.apache.flink.table.api.TableEnvironment}}.

A better approach is to perform the type extraction Table API specific within the UDF and let users add additional information through UDF annotations.

An exact annotation and extraction design will follow.



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