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Posted to dev@arrow.apache.org by "Andy Grove (Jira)" <ji...@apache.org> on 2020/04/14 22:55:00 UTC

[jira] [Created] (ARROW-8464) [Rust] [DataFusion] Add support for dictionary types

Andy Grove created ARROW-8464:
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             Summary: [Rust] [DataFusion] Add support for dictionary types
                 Key: ARROW-8464
                 URL: https://issues.apache.org/jira/browse/ARROW-8464
             Project: Apache Arrow
          Issue Type: Improvement
          Components: Rust - DataFusion
            Reporter: Andy Grove


 
 * BatchIterator should accept both DictionaryBatch and RecordBatch
 * Type Coercion optimizer rule should inject expression for converting dictionary value types to index types (for equality expressions, and IN(values, ...)
 * Physical expression would lookup index for dictionary values referenced in the query so that at runtime, only indices are being compared per batch



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