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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