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From "Navis (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (HIVE-3250) ArrayIndexOutOfBoundsException in ColumnPrunerProcFactory$ColumnPrunerSelectProc
Date Fri, 13 Jul 2012 10:28:34 GMT

    [ https://issues.apache.org/jira/browse/HIVE-3250?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13413638#comment-13413638
] 

Navis commented on HIVE-3250:
-----------------------------

Sorry, I've attached the patch.
                
> ArrayIndexOutOfBoundsException in ColumnPrunerProcFactory$ColumnPrunerSelectProc
> --------------------------------------------------------------------------------
>
>                 Key: HIVE-3250
>                 URL: https://issues.apache.org/jira/browse/HIVE-3250
>             Project: Hive
>          Issue Type: Bug
>    Affects Versions: 0.8.0
>            Reporter: Nicolas Lalevée
>
> I have a query which was not selecting field and the optimizer fails to evict them with
the following stack trace:
> {noformat}
> FAILED: Hive Internal Error: java.lang.ArrayIndexOutOfBoundsException(-1)
> java.lang.ArrayIndexOutOfBoundsException: -1
>     at java.util.ArrayList.get(ArrayList.java:324)
>     at org.apache.hadoop.hive.ql.optimizer.ColumnPrunerProcFactory$ColumnPrunerSelectProc.process(ColumnPrunerProcFactory.java:397)
>     at org.apache.hadoop.hive.ql.lib.DefaultRuleDispatcher.dispatch(DefaultRuleDispatcher.java:89)
>     at org.apache.hadoop.hive.ql.lib.DefaultGraphWalker.dispatch(DefaultGraphWalker.java:88)
>     at org.apache.hadoop.hive.ql.optimizer.ColumnPruner$ColumnPrunerWalker.walk(ColumnPruner.java:143)
>     at org.apache.hadoop.hive.ql.lib.DefaultGraphWalker.startWalking(DefaultGraphWalker.java:102)
>     at org.apache.hadoop.hive.ql.optimizer.ColumnPruner.transform(ColumnPruner.java:106)
>     at org.apache.hadoop.hive.ql.optimizer.Optimizer.optimize(Optimizer.java:87)
>     at org.apache.hadoop.hive.ql.parse.SemanticAnalyzer.analyzeInternal(SemanticAnalyzer.java:7306)
>     at org.apache.hadoop.hive.ql.parse.BaseSemanticAnalyzer.analyze(BaseSemanticAnalyzer.java:243)
>     at org.apache.hadoop.hive.ql.Driver.compile(Driver.java:430)
>     at org.apache.hadoop.hive.ql.Driver.compile(Driver.java:337)
>     at org.apache.hadoop.hive.ql.Driver.run(Driver.java:889)
>     at org.apache.hadoop.hive.service.HiveServer$HiveServerHandler.execute(HiveServer.java:191)
>     at org.apache.hadoop.hive.jdbc.HiveStatement.executeQuery(HiveStatement.java:187)
> {noformat}
> The failing query reduced to the only failing part:
> {noformat}
> SELECT explodedUrls FROM
>   (
>     SELECT userid, array(named_struct('date', count(*))) AS urls, count(*) AS user_lid
FROM
>       (
>         SELECT * FROM NicoPageViewEvent WHERE day > '20130801'
>       ) pve
>     GROUP BY userid
>   ) userViewData
> LATERAL VIEW s_explode_pageflow(userViewData.urls) userViewDataLateralView AS explodedUrls
> {noformat}
> Adding fields make it work:
> {noformat}
> SELECT userid, explodedUrls, user_lid FROM
>   (
>     SELECT userid, array(named_struct('date', count(*))) AS urls, count(*) AS user_lid
FROM
>       (
>         SELECT * FROM NicoPageViewEvent WHERE day > '20130801'
>       ) pve
>     GROUP BY userid
>   ) userViewData
> LATERAL VIEW s_explode_pageflow(userViewData.urls) userViewDataLateralView AS explodedUrls
> {noformat}
> And s_explode_pageflow is a custom function which take an array of struct and split them
into arrays of struct

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