[
https://issues.apache.org/jira/browse/PHOENIX-6086?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=17225418#comment-17225418
]
ASF GitHub Bot commented on PHOENIX-6086:
-----------------------------------------
virajjasani commented on pull request #952:
URL: https://github.com/apache/phoenix/pull/952#issuecomment-720521681
spotbug warning `passes a nonconstant String to an execute or addBatch
method on an SQL statement` almost seem quite difficult to avoid (also not
related to main code changes, it was updated due to other spotbug reason) since
we need to provide arguments to Alter Table query.
----------------------------------------------------------------
This is an automated message from the Apache Git Service.
To respond to the message, please log on to GitHub and use the
URL above to go to the specific comment.
For queries about this service, please contact Infrastructure at:
[email protected]
> Take a snapshot of all SYSTEM tables before attempting to upgrade them
> ----------------------------------------------------------------------
>
> Key: PHOENIX-6086
> URL: https://issues.apache.org/jira/browse/PHOENIX-6086
> Project: Phoenix
> Issue Type: Improvement
> Affects Versions: 5.0.0, 4.15.0
> Reporter: Chinmay Kulkarni
> Assignee: Viraj Jasani
> Priority: Critical
> Fix For: 5.1.0, 4.16.0
>
> Attachments: PHOENIX-6086.master.000.patch,
> PHOENIX-6086.master.002.patch
>
>
> Currently we only take a snapshot of SYSTEM.CATALOG before attempting to
> upgrade it (see
> [this|https://github.com/apache/phoenix/blob/1922895dfe5960dc025709b04acfaf974d3959dc/phoenix-core/src/main/java/org/apache/phoenix/query/ConnectionQueryServicesImpl.java#L3718]).
> From 4.15 onwards we also store critical metadata information in other
> SYSTEM tables like SYSTEM.CHILD_LINK, so it is beneficial to also snapshot
> those tables before upgrading them henceforth.
> We also currently don't take a snapshot of SYSTEM.CATALOG on receiving an
> [UpgradeRequiredException|https://github.com/apache/phoenix/blob/1922895dfe5960dc025709b04acfaf974d3959dc/phoenix-core/src/main/java/org/apache/phoenix/query/ConnectionQueryServicesImpl.java#L3685-L3707]
> which we should do.
> In case of any errors during the upgrade, we restore SYSTEM.CATALOG from this
> snapshot and we should extend this to all tables. In cases where the table
> didn't exist before the upgrade, we need to ensure it is dropped so that a
> subsequent upgrade attempt can start afresh.
--
This message was sent by Atlassian Jira
(v8.3.4#803005)
