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https://issues.apache.org/jira/browse/HIVE-21462?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16795214#comment-16795214
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Daniel Dai commented on HIVE-21462:
-----------------------------------
+1
> Upgrading SQL server backed metastore when changing data type of a column
> with constraints
> ------------------------------------------------------------------------------------------
>
> Key: HIVE-21462
> URL: https://issues.apache.org/jira/browse/HIVE-21462
> Project: Hive
> Issue Type: Bug
> Components: Standalone Metastore
> Reporter: Ashutosh Bapat
> Assignee: Ashutosh Bapat
> Priority: Major
> Labels: pull-request-available
> Fix For: 4.0.0
>
> Attachments: HIVE-21462.01.patch
>
> Original Estimate: 24h
> Time Spent: 10m
> Remaining Estimate: 23h 50m
>
> SQL server does not allow changing data type of a column which has a
> constraint or an index on it. The constraint or the index needs to be dropped
> before changing the data type and needs to be recreated after that. Metastore
> upgrade scripts aren't doing this and thus upgrade fails.
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