Owen O'Malley created ORC-292:
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Summary: Build optional indexes on columns
Key: ORC-292
URL: https://issues.apache.org/jira/browse/ORC-292
Project: ORC
Issue Type: Improvement
Reporter: Owen O'Malley
For small cardinality string columns, including nested columns, it would be
really nice to have an optional index at the stripe level that records for each
value, which row groups that value occurs in.
I would propose making a new index that maps from the dictionary position to
row group number.
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