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Posted to jira@arrow.apache.org by "Andrew Lamb (Jira)" <ji...@apache.org> on 2020/10/06 10:13:00 UTC

[jira] [Updated] (ARROW-10163) [Rust] [DataFusion] Add DictionaryArray coercion support

     [ https://issues.apache.org/jira/browse/ARROW-10163?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]

Andrew Lamb updated ARROW-10163:
--------------------------------
    Summary: [Rust] [DataFusion] Add DictionaryArray coercion support  (was: [Rust] [DataFusion] Allow DataFusion to cast all type combinations supported by Arrow cast kernel)

> [Rust] [DataFusion] Add DictionaryArray coercion support
> --------------------------------------------------------
>
>                 Key: ARROW-10163
>                 URL: https://issues.apache.org/jira/browse/ARROW-10163
>             Project: Apache Arrow
>          Issue Type: Sub-task
>            Reporter: Andrew Lamb
>            Assignee: Andrew Lamb
>            Priority: Major
>
> --- 
> There is code in the datafusion physical planner that coerces arguments to compatible types for some expressions (e.g. for equals: https://github.com/apache/arrow/blob/master/rust/datafusion/src/physical_plan/expressions.rs#L1153)
> This code needs to be modified to understand dictionary types (so, for example we can express a predicate like col1 = "foo", where col1 is a DictionaryArray.



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