Micah Kornfield created ARROW-6473:
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Summary: [Format] Clarify dictionary encoding edge cases
Key: ARROW-6473
URL: https://issues.apache.org/jira/browse/ARROW-6473
Project: Apache Arrow
Issue Type: Improvement
Components: Documentation, Format
Reporter: Micah Kornfield
Assignee: Micah Kornfield
Several recent threads on the mailing list:
1. Edge case for all null columns and interleaved dictionaries
2. Semantics non-delta dictionaries (and relation to the file format).
3. Propose a forward compatible enum so dictionaries can represented as other
types besides for a "flat" vector.
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