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https://issues.apache.org/jira/browse/HIVE-2938?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=13250162#comment-13250162
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Carl Steinbach commented on HIVE-2938:
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Support for ALTER TABLE ADD IF NOT EXISTS PARTITION was added in HIVE-1106.
However, this patch introduced a time-of-check-to-time-of-use bug since the
check to see if the partition already exists is done in a transaction separate
from the one in which the partition is actually created. We need to provide
support for IF NOT EXISTS at the level of the Metastore Thrift API in order to
support this correctly.
> ALTER TABLE ADD IF NOT EXISTS PARTITION is not atomic
> -----------------------------------------------------
>
> Key: HIVE-2938
> URL: https://issues.apache.org/jira/browse/HIVE-2938
> Project: Hive
> Issue Type: Bug
> Components: Metastore
> Affects Versions: 0.5.0, 0.6.0, 0.7.0, 0.8.0, 0.8.1
> Reporter: Carl Steinbach
>
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