Jesus Camacho Rodriguez created HIVE-14096: ----------------------------------------------
Summary: Extend RS dedup logic to merge GBy operators Key: HIVE-14096 URL: https://issues.apache.org/jira/browse/HIVE-14096 Project: Hive Issue Type: Bug Components: Physical Optimizer Affects Versions: 2.2.0 Reporter: Jesus Camacho Rodriguez Since we always generate map-side GBy at plan generation time, there are occasion when we could collapse GBy after RS dedup optimization. This means that GBy would be executed in a single stage with {{mode = complete}}. Example in {{reduce_deduplicate_extended2.q.out}}: {noformat} SELECT f.key, g.value FROM src f JOIN src g ON (f.key = g.key AND f.value = g.value) GROUP BY g.value, f.key {noformat} -- This message was sent by Atlassian JIRA (v6.3.4#6332)