[jira] [Resolved] (IMPALA-6090) Default value for columns with schema evolution

["Tim Armstrong (Jira)" <ji...@apache.org>]

     [ 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.



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