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https://issues.apache.org/jira/browse/HIVE-24231?focusedWorklogId=502642&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-502642
]
ASF GitHub Bot logged work on HIVE-24231:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 20/Oct/20 11:56
Start Date: 20/Oct/20 11:56
Worklog Time Spent: 10m
Work Description: kgyrtkirk commented on a change in pull request #1553:
URL: https://github.com/apache/hive/pull/1553#discussion_r508438776
##########
File path:
ql/src/java/org/apache/hadoop/hive/ql/optimizer/SharedWorkOptimizer.java
##########
@@ -284,6 +304,54 @@ public ParseContext transform(ParseContext pctx) throws
SemanticException {
return pctx;
}
+ /** SharedWorkOptimization strategy modes */
+ public enum Mode {
+ /**
+ * Merges two identical subtrees.
+ */
+ SubtreeMerge,
+ /**
+ * Merges a filtered scan into a non-filtered scan.
+ *
+ * In case we are already scanning the whole table - we should not scan it
twice.
+ */
+ RemoveSemijoin,
+ /**
+ * Fuses two filtered table scans into a single one.
+ *
+ * Dynamic filter subtree is kept on both sides - but the table is onlt
scanned once.
Review comment:
added fix to HIVE-24241
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Issue Time Tracking
-------------------
Worklog Id: (was: 502642)
Time Spent: 3.5h (was: 3h 20m)
> Enhance shared work optimizer to merge scans with filters on both sides
> -----------------------------------------------------------------------
>
> Key: HIVE-24231
> URL: https://issues.apache.org/jira/browse/HIVE-24231
> Project: Hive
> Issue Type: Improvement
> Reporter: Zoltan Haindrich
> Assignee: Zoltan Haindrich
> Priority: Major
> Labels: pull-request-available
> Time Spent: 3.5h
> Remaining Estimate: 0h
>
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