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https://issues.apache.org/jira/browse/HIVE-21279?focusedWorklogId=221509&page=com.atlassian.jira.plugin.system.issuetabpanels:worklog-tabpanel#worklog-221509
]
ASF GitHub Bot logged work on HIVE-21279:
-----------------------------------------
Author: ASF GitHub Bot
Created on: 01/Apr/19 22:15
Start Date: 01/Apr/19 22:15
Worklog Time Spent: 10m
Work Description: vineetgarg02 commented on pull request #582: Hive
21386: Extend the fetch task enhancement done in HIVE-21279 to make it work
with query result cache
URL: https://github.com/apache/hive/pull/582#discussion_r271070841
##########
File path: ql/src/java/org/apache/hadoop/hive/ql/parse/SemanticAnalyzer.java
##########
@@ -7175,6 +7176,23 @@ private ExprNodeDesc getNotNullConstraintExpr(Table
targetTable, Operator input,
return currUDF;
}
+ private Path getDestinationFilePath(final String destinationFile, boolean
isMmTable)
+ throws SemanticException {
+ if (this.isResultsCacheEnabled() && this.queryTypeCanUseCache()) {
+ assert (!isMmTable);
Review comment:
From what I understood this will either be called for SELECT queries or
CTAS. Result cached is disabled for CTAS. This is kind of indirect way of
asserting that if result cache is enabled it is SELECT and not CTAS.
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Issue Time Tracking
-------------------
Worklog Id: (was: 221509)
Time Spent: 2h 10m (was: 2h)
> Avoid moving/rename operation in FileSink op for SELECT queries
> ---------------------------------------------------------------
>
> Key: HIVE-21279
> URL: https://issues.apache.org/jira/browse/HIVE-21279
> Project: Hive
> Issue Type: Improvement
> Components: Query Planning
> Reporter: Vineet Garg
> Assignee: Vineet Garg
> Priority: Major
> Labels: pull-request-available
> Fix For: 4.0.0
>
> Attachments: HIVE-21279.1.patch, HIVE-21279.10.patch,
> HIVE-21279.11.patch, HIVE-21279.12.patch, HIVE-21279.13.patch,
> HIVE-21279.2.patch, HIVE-21279.3.patch, HIVE-21279.4.patch,
> HIVE-21279.5.patch, HIVE-21279.6.patch, HIVE-21279.7.patch,
> HIVE-21279.8.patch, HIVE-21279.9.patch
>
> Time Spent: 2h 10m
> Remaining Estimate: 0h
>
> Currently at the end of a job FileSink operator moves/rename temp directory
> to another directory from which FetchTask fetches result. This is done to
> avoid fetching potential partial/invalid files by failed/runway tasks. This
> operation is expensive for cloud storage. It could be avoided if FetchTask is
> passed on set of files to read from instead of whole directory.
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