[ https://issues.apache.org/jira/browse/IMPALA-10185?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Tim Armstrong updated IMPALA-10185: ----------------------------------- Component/s: Frontend > Leverage boolean statistics for computing selectivity > ----------------------------------------------------- > > Key: IMPALA-10185 > URL: https://issues.apache.org/jira/browse/IMPALA-10185 > Project: IMPALA > Issue Type: Improvement > Components: Frontend > Affects Versions: Impala 3.4.0 > Reporter: Shant Hovsepian > Assignee: Shant Hovsepian > Priority: Minor > > As part of computing stats for a boolean column we record the value counts. > numTrues, numFalses, numNulls. > However when calculating cardinality for boolean column predicates the > selectivity of 1/3 is always used instead of factoring the value distribution > recorded in the stats. -- This message was sent by Atlassian Jira (v8.3.4#803005) --------------------------------------------------------------------- To unsubscribe, e-mail: issues-all-unsubscr...@impala.apache.org For additional commands, e-mail: issues-all-h...@impala.apache.org