[
https://issues.apache.org/jira/browse/IMPALA-6090?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
Tim Armstrong resolved IMPALA-6090.
-----------------------------------
Resolution: Cannot Reproduce
> Default value for columns with schema evolution
> -----------------------------------------------
>
> Key: IMPALA-6090
> URL: https://issues.apache.org/jira/browse/IMPALA-6090
> Project: IMPALA
> Issue Type: New Feature
> Components: Frontend
> Reporter: Zsolt Herczeg
> Priority: Minor
>
> Currently, if a query references a column which is not present for a row,
> that row is silently ignored. In case of a schema evolution where new columns
> has been added, it's not possible to query the new columns and the old data
> at the same time.
> Impala could have a default value for each column, which is returned in case
> of that column is missing instead of ignoring the row. This would allow a
> single query to include the old data and contain the newly added columns
> where they're present.
--
This message was sent by Atlassian Jira
(v8.3.4#803005)
