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Posted to dev@hive.apache.org by "Venky Iyer (JIRA)" <ji...@apache.org> on 2009/02/27 11:52:12 UTC
[jira] Created: (HIVE-315) remove map() and reduce()
remove map() and reduce()
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Key: HIVE-315
URL: https://issues.apache.org/jira/browse/HIVE-315
Project: Hadoop Hive
Issue Type: Bug
Reporter: Venky Iyer
this is a minor thing, but since these aren't actually doing anything to ensure mapper/reducer semantics, they are misleading. everything is a transform.
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[jira] Commented: (HIVE-315) remove map() and reduce()
Posted by "Adam Kramer (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HIVE-315?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12714245#action_12714245 ]
Adam Kramer commented on HIVE-315:
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Another option is to actually fix them to ensure mapper/reducer semantics.
It would be lovely, for example, if MAP forced the data transformation to occur in a map step (creating a new mapreduce process if necessary) and REDUCE forced the data transformation to occur in a reduce step.
This would be very helpful for specifying how data is to be transformed, as MAP scripts are inherently different from REDUCE scripts, since one may need to assume sorted data and the other by definition cannot.
But if we can't make MAP and REDUCE actually refer/ensure that the program will be run in the MAP or REDUCE step, I agree that this syntax should be eliminated because it is misleading.
> remove map() and reduce()
> -------------------------
>
> Key: HIVE-315
> URL: https://issues.apache.org/jira/browse/HIVE-315
> Project: Hadoop Hive
> Issue Type: Bug
> Reporter: Venky Iyer
>
> this is a minor thing, but since these aren't actually doing anything to ensure mapper/reducer semantics, they are misleading. everything is a transform.
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[jira] Updated: (HIVE-315) remove map() and reduce()
Posted by "Zheng Shao (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HIVE-315?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Zheng Shao updated HIVE-315:
----------------------------
Priority: Minor (was: Major)
Issue Type: Wish (was: Bug)
> remove map() and reduce()
> -------------------------
>
> Key: HIVE-315
> URL: https://issues.apache.org/jira/browse/HIVE-315
> Project: Hadoop Hive
> Issue Type: Wish
> Reporter: Venky Iyer
> Priority: Minor
>
> this is a minor thing, but since these aren't actually doing anything to ensure mapper/reducer semantics, they are misleading. everything is a transform.
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