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https://issues.apache.org/jira/browse/PHOENIX-2968?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=15317225#comment-15317225
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Mujtaba Chohan commented on PHOENIX-2968:
-----------------------------------------
{{ALTER VIEW}} call is required before each upsert as we want to make sure tag
exists for a view otherwise create a new tag (which is added as a column to
view).
> Reduce alter statement RPC when table/view is set with APPEND_ONLY_SCHEMA and
> high value for UPDATE_CACHE_FREQUENCY
> -------------------------------------------------------------------------------------------------------------------
>
> Key: PHOENIX-2968
> URL: https://issues.apache.org/jira/browse/PHOENIX-2968
> Project: Phoenix
> Issue Type: Bug
> Reporter: Mujtaba Chohan
> Assignee: James Taylor
> Labels: Argus
>
> View is created with {{CREATE VIEW IF NOT EXISTS ... APPEND_ONLY_SCHEMA =
> true, UPDATE_CACHE_FREQUENCY=900000}}
> If {{ALTER VIEW <VIEW_NAME> ADD IF NOT EXISTS MYCOL VARCHAR}} is executed
> before each upsert statement then performance for each 1K batch upsert
> degrades by ~40X (50ms for 1K batch without alter statement vs 2300ms with
> alter statement)
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