Peter Ebert created IMPALA-7547:
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Summary: For distinct queries use dictionary encoded page instead
of reading all data
Key: IMPALA-7547
URL: https://issues.apache.org/jira/browse/IMPALA-7547
Project: IMPALA
Issue Type: Improvement
Reporter: Peter Ebert
When dictionary encoding is in use the lookup table should contain a distinct
list of all values in the data, can skip reading the values and just read the
header to get distinct values.
Realize this would be a big change to the read/scanner threads but could
greatly speed up distinct queries.
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