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https://issues.apache.org/jira/browse/IMPALA-11565?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Baike Xia updated IMPALA-11565:
-------------------------------
Description:
Impala already supports IF NOT EXISTS in alter table add columns for general
hive table in [IMPALA-7832|http://issues.apache.org/jira/browse/IMPALA-7832],
but not for kudu table. This patch try to add such semantics for kudu table.
was:
For alter table, *add if not exists column* operation , if the columns already
exist and are of the same type, no operation is performed; If the type is
different, an error is reported.
> Support IF NOT EXISTS in alter table add columns for kudu table
> ---------------------------------------------------------------
>
> Key: IMPALA-11565
> URL: https://issues.apache.org/jira/browse/IMPALA-11565
> Project: IMPALA
> Issue Type: New Feature
> Reporter: Baike Xia
> Assignee: Baike Xia
> Priority: Major
> Fix For: Impala 4.2.0
>
>
> Impala already supports IF NOT EXISTS in alter table add columns for general
> hive table in [IMPALA-7832|http://issues.apache.org/jira/browse/IMPALA-7832],
> but not for kudu table. This patch try to add such semantics for kudu table.
>
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