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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