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https://issues.apache.org/jira/browse/HIVE-1510?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12900113#action_12900113
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Ning Zhang commented on HIVE-1510:
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Other than the clean architecture concerns (Driver should be generic and should
not assume tasks contain MR jobs), it seems also doesn't work if parallel
execution is enabled: IOPrepareCache is thread local and parallel MR jobs are
launched in different threads.
> HiveCombineInputFormat should not use prefix matching to find the
> partitionDesc for a given path
> ------------------------------------------------------------------------------------------------
>
> Key: HIVE-1510
> URL: https://issues.apache.org/jira/browse/HIVE-1510
> Project: Hadoop Hive
> Issue Type: Bug
> Reporter: He Yongqiang
> Assignee: He Yongqiang
> Attachments: hive-1510.1.patch, hive-1510.3.patch
>
>
> set hive.input.format=org.apache.hadoop.hive.ql.io.CombineHiveInputFormat;
> drop table combine_3_srcpart_seq_rc;
> create table combine_3_srcpart_seq_rc (key int , value string) partitioned by
> (ds string, hr string) stored as sequencefile;
> insert overwrite table combine_3_srcpart_seq_rc partition (ds="2010-08-03",
> hr="00") select * from src;
> alter table combine_3_srcpart_seq_rc set fileformat rcfile;
> insert overwrite table combine_3_srcpart_seq_rc partition (ds="2010-08-03",
> hr="001") select * from src;
> desc extended combine_3_srcpart_seq_rc partition(ds="2010-08-03", hr="00");
> desc extended combine_3_srcpart_seq_rc partition(ds="2010-08-03", hr="001");
> select * from combine_3_srcpart_seq_rc where ds="2010-08-03" order by key;
> drop table combine_3_srcpart_seq_rc;
> will fail.
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