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https://issues.apache.org/jira/browse/HIVE-17942?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16246104#comment-16246104
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Janaki Lahorani commented on HIVE-17942:
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@akolb Changing AlterHandler to be not configurable is a significant change -
potentially backward incompatible. There can be other implementations that can
be used other than HiveAlterHandler.
https://github.com/apache/hive/blob/master/metastore/src/java/org/apache/hadoop/hive/metastore/HiveMetaStore.java#L485
Also, though this can be considered as a good code cleanup, it is in theory
cosmetic and not needed for this bug fix.
And, the story about the way HMS Handler works with DDL handlers is a design
detail that is common to all DDL handlers, hence doesn't necessarily belong in
any DDL handler, but rather in a design document or possibly in HMS Handler
implementation, which again IMHO outside the scope of this bug fix.
There is an example in the test.
Configuration changes within a connection is to be made using
set <parameter>=value
If the configuration change is to be effective in HMS it is to be prepended
with metaconf:
set metaconf:<parameter>=value
Example:
set metaconf:hive.metastore.disallow.incompatible.col.type.changes=false
> HiveAlterHandler not using conf from HMS Handler
> ------------------------------------------------
>
> Key: HIVE-17942
> URL: https://issues.apache.org/jira/browse/HIVE-17942
> Project: Hive
> Issue Type: Bug
> Affects Versions: 2.1.1
> Reporter: Janaki Lahorani
> Assignee: Janaki Lahorani
> Fix For: 3.0.0
>
> Attachments: HIVE-17942.1.patch, HIVE-17942.2.patch,
> HIVE-17942.3.patch, HIVE-17942.4.patch, HIVE-17942.5.patch
>
>
> When HiveAlterHandler looks for conf, it is not getting the one from thread
> local. So, local changes are not visible.
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