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From Nicolas Lalevée (JIRA) <j...@apache.org>
Subject [jira] [Created] (HIVE-3250) ArrayIndexOutOfBoundsException in ColumnPrunerProcFactory$ColumnPrunerSelectProc
Date Wed, 11 Jul 2012 09:58:35 GMT
Nicolas Lalevée created HIVE-3250:
-------------------------------------

             Summary: 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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