Reynold Xin created SPARK-3864:
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Summary: Specialize join for tables with unique integer keys
Key: SPARK-3864
URL: https://issues.apache.org/jira/browse/SPARK-3864
Project: Spark
Issue Type: Sub-task
Components: SQL
Reporter: Reynold Xin
We can create a new operator that uses an array as the underlying storage to
avoid hash lookups entirely for dimension tables that have integer keys.
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