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https://issues.apache.org/jira/browse/HIVE-3958?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13623043#comment-13623043
]
Hudson commented on HIVE-3958:
------------------------------
Integrated in Hive-trunk-hadoop2 #138 (See
[https://builds.apache.org/job/Hive-trunk-hadoop2/138/])
HIVE-3958 support partial scan for analyze command - RCFile
(Gang Tim Liu via namit) (Revision 1461586)
Result = FAILURE
namit : http://svn.apache.org/viewcvs.cgi/?root=Apache-SVN&view=rev&rev=1461586
Files :
* /hive/trunk/common/src/java/org/apache/hadoop/hive/conf/HiveConf.java
* /hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/ErrorMsg.java
* /hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/exec/StatsTask.java
* /hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/exec/TaskFactory.java
*
/hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/io/rcfile/merge/RCFileKeyBufferWrapper.java
* /hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/io/rcfile/stats
*
/hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/io/rcfile/stats/PartialScanMapper.java
*
/hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/io/rcfile/stats/PartialScanTask.java
*
/hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/io/rcfile/stats/PartialScanWork.java
*
/hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/optimizer/GenMRTableScan1.java
*
/hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/parse/ColumnStatsSemanticAnalyzer.java
* /hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/parse/HiveLexer.g
* /hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/parse/HiveParser.g
* /hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/parse/QBParseInfo.java
* /hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/parse/SemanticAnalyzer.java
* /hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/plan/StatsWork.java
*
/hive/trunk/ql/src/java/org/apache/hadoop/hive/ql/stats/jdbc/JDBCStatsAggregator.java
* /hive/trunk/ql/src/test/queries/clientnegative/stats_partialscan_autogether.q
*
/hive/trunk/ql/src/test/queries/clientnegative/stats_partialscan_non_external.q
* /hive/trunk/ql/src/test/queries/clientnegative/stats_partialscan_non_native.q
* /hive/trunk/ql/src/test/queries/clientnegative/stats_partscan_norcfile.q
* /hive/trunk/ql/src/test/queries/clientpositive/stats_partscan_1.q
*
/hive/trunk/ql/src/test/results/clientnegative/stats_partialscan_autogether.q.out
*
/hive/trunk/ql/src/test/results/clientnegative/stats_partialscan_non_external.q.out
*
/hive/trunk/ql/src/test/results/clientnegative/stats_partialscan_non_native.q.out
* /hive/trunk/ql/src/test/results/clientnegative/stats_partscan_norcfile.q.out
* /hive/trunk/ql/src/test/results/clientpositive/stats_partscan_1.q.out
> support partial scan for analyze command - RCFile
> -------------------------------------------------
>
> Key: HIVE-3958
> URL: https://issues.apache.org/jira/browse/HIVE-3958
> Project: Hive
> Issue Type: Improvement
> Reporter: Gang Tim Liu
> Assignee: Gang Tim Liu
> Fix For: 0.11.0
>
> Attachments: HIVE-3958.patch.1, HIVE-3958.patch.2, HIVE-3958.patch.3,
> HIVE-3958.patch.4, HIVE-3958.patch.5, HIVE-3958.patch.6
>
>
> analyze commands allows us to collect statistics on existing
> tables/partitions. It works great but might be slow since it scans all files.
> There are 2 ways to speed it up:
> 1. collect stats without file scan. It may not collect all stats but good and
> fast enough for use case. HIVE-3917 addresses it
> 2. collect stats via partial file scan. It doesn't scan all content of files
> but part of it to get file metadata. some examples are
> https://cwiki.apache.org/Hive/rcfilecat.html for RCFile, ORC ( HIVE-3874 )
> and HFile of Hbase
> This jira is targeted to address the #2. More specifically RCFile format.
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