Qifan Chen created IMPALA-10495:
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Summary: Computing correlation coefficient for certain columns can
be useful to min/max filters
Key: IMPALA-10495
URL: https://issues.apache.org/jira/browse/IMPALA-10495
Project: IMPALA
Issue Type: Improvement
Components: Backend
Reporter: Qifan Chen
Selecting good min/max filters for a query during query compilation can be a
difficult task as the benefit of such a filter may not known. However, when a
column C is known to have a strong correlation with a partition or a sort
column, a min/max filter on C can be very useful.
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