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https://issues.apache.org/jira/browse/ARROW-10236?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Andrew Lamb updated ARROW-10236:
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Summary: [Rust] [DataFusion] Make DataFusion casting rules consistent with
cast kernel (was: [Rust] [DataFusion] Make DataFusion casting rules consistent
with cast kernel rules )
> [Rust] [DataFusion] Make DataFusion casting rules consistent with cast kernel
> -----------------------------------------------------------------------------
>
> Key: ARROW-10236
> URL: https://issues.apache.org/jira/browse/ARROW-10236
> Project: Apache Arrow
> Issue Type: Improvement
> Reporter: Andrew Lamb
> Assignee: Andrew Lamb
> Priority: Major
>
> There are plan time checks for valid type casts in DataFusion that are
> designed to catch errors early before plan execution
> Sadly the cast types that DataFusion thinks are valid is a significant subset
> of what the arrow cast kernel supports. The goal of this ticket is to bring
> DataFusion to parity with the type casting supported by arrow and allow
> DataFusion to plan all casts that are supported by the arrow cast kernel
> (I want this implicitly so when I add support for DictionaryArray casts in
> Arrow they also are part of DataFusion)
> Previously the notions of coercion and casting were somewhat conflated. I
> have tried to clarify them in https://github.com/apache/arrow/pull/8399 as
> well
> For more detail, see
> https://github.com/apache/arrow/pull/8340#discussion_r501257096 from
> [~jorgecarleitao]
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