Liya Fan created ARROW-6185:
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Summary: [Java] Provide hash table based dictionary builder
Key: ARROW-6185
URL: https://issues.apache.org/jira/browse/ARROW-6185
Project: Apache Arrow
Issue Type: New Feature
Components: Java
Reporter: Liya Fan
Assignee: Liya Fan
This is related ARROW-5862. We provide another type of dictionary builder based
on hash table. Compared with a search based dictionary encoder, a hash table
based encoder process each new element in O(1) time, but require extra memory
space.
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