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https://issues.apache.org/jira/browse/MAPREDUCE-1097?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=12788248#action_12788248
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Aaron Kimball commented on MAPREDUCE-1097:
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VerticaRecord does implement Writable, so it's conceivable that users may have
stored VerticaRecord instances in SequenceFiles on HDFS; regardless of whether
you intended this to be an internal-only class, users do funny things.. but
hopefully not too many will have done so. I don't think it's a big problem,
especially since this is a fairly young contrib module. Some volatility should
probably be expected here.
At the very least, though, you should mark this issue as an "incompatible
change" (see the "Edit this issue" link on the left).
Thanks for making the other changes. I'm +0.75 on this patch -- would
appreciate it if someone else could weigh in on the issue of whether they think
persistent VerticaRecord incompatibility is problematic or if they've got a
creative solution. (Some day we'll all just use Avro and schema evolution will
take care of all of this... but until then..)
> Changes/fixes to support Vertica 3.5
> ------------------------------------
>
> Key: MAPREDUCE-1097
> URL: https://issues.apache.org/jira/browse/MAPREDUCE-1097
> Project: Hadoop Map/Reduce
> Issue Type: Improvement
> Affects Versions: 0.21.0
> Environment: Hadoop 0.21.0 pre-release and Vertica 3.5
> Reporter: Omer Trajman
> Assignee: Omer Trajman
> Priority: Minor
> Fix For: 0.21.0
>
> Attachments: MAPREDUCE-1097-2.patch, MAPREDUCE-1097.patch
>
>
> Vertica 3.5 includes three changes that the formatters should handle:
> 1) deploy_design function that handles much of the logic in the optimize
> method. This improvement uses deploy_design if the server version supports
> it instead of orchestrating in the formatter function.
> 2) truncate table instead of recreating the table
> 3) numeric, decimal, money, number types (all the same path)
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