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https://issues.apache.org/jira/browse/FLINK-12710?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Timo Walther closed FLINK-12710.
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Resolution: Implemented
Implemented as part of FLINK-20522.
> Unify built-in and user-defined functions in the API modules
> ------------------------------------------------------------
>
> Key: FLINK-12710
> URL: https://issues.apache.org/jira/browse/FLINK-12710
> Project: Flink
> Issue Type: New Feature
> Components: Table SQL / API
> Reporter: Timo Walther
> Priority: Major
> Labels: auto-unassigned, pull-request-available
> Time Spent: 20m
> Remaining Estimate: 0h
>
> Currently, there are three completely different stacks of functions: Table
> API builtins, SQL builtins, and user-defined types.
> Both the Blink and the legacy planner define a separate list of functions and
> implementations with different type system and type checking logic.
> The long-term goal of this issue is to unify all 6 different stacks into a
> common one. This includes better support for type inference which relates to
> FLINK-12251.
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