You are viewing a plain text version of this content. The canonical link for it is here.
Posted to dev@hive.apache.org by "Namit Jain (JIRA)" <ji...@apache.org> on 2009/08/05 03:30:14 UTC
[jira] Created: (HIVE-723) output columns should be redundant if an
insert immediately follows
output columns should be redundant if an insert immediately follows
-------------------------------------------------------------------
Key: HIVE-723
URL: https://issues.apache.org/jira/browse/HIVE-723
Project: Hadoop Hive
Issue Type: New Feature
Components: Query Processor
Reporter: Namit Jain
If the reducer transformation function is inserting into a hive table immediately, hive should be automatically able to infer the number of columns instead of asking the user to do so.
It becomes a problem if the source table schema is changing - the query needs to be unnecessarily modified
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.
[jira] Commented: (HIVE-723) output columns should be redundant if
an insert immediately follows
Posted by "Zheng Shao (JIRA)" <ji...@apache.org>.
[ https://issues.apache.org/jira/browse/HIVE-723?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12739915#action_12739915 ]
Zheng Shao commented on HIVE-723:
---------------------------------
A second thought on this: If this feature is in, and the source table schema is changing, then we might have inserted wrong data into the table.
If the source table schema changed, then most probably users will need to modify the transform script any way, so it seems to me the overhead of modifying the query is not that big.
Also it might be a bit hard to do because we still require "AS columns" if it's an "INSERT OVERWRITE DIRECTORY", so we need to treat these differently.
> output columns should be redundant if an insert immediately follows
> -------------------------------------------------------------------
>
> Key: HIVE-723
> URL: https://issues.apache.org/jira/browse/HIVE-723
> Project: Hadoop Hive
> Issue Type: New Feature
> Components: Query Processor
> Reporter: Namit Jain
>
> If the reducer transformation function is inserting into a hive table immediately, hive should be automatically able to infer the number of columns instead of asking the user to do so.
> It becomes a problem if the source table schema is changing - the query needs to be unnecessarily modified
--
This message is automatically generated by JIRA.
-
You can reply to this email to add a comment to the issue online.