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https://issues.apache.org/jira/browse/HIVE-26555?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
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Teddy Choi updated HIVE-26555:
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Status: Patch Available (was: In Progress)
> Read-only mode
> --------------
>
> Key: HIVE-26555
> URL: https://issues.apache.org/jira/browse/HIVE-26555
> Project: Hive
> Issue Type: New Feature
> Reporter: Teddy Choi
> Assignee: Teddy Choi
> Priority: Minor
> Labels: pull-request-available
> Time Spent: 0.5h
> Remaining Estimate: 0h
>
> h1. Purpose
> In failover/fail-back scenarios, a Hive database needs to be read-only, while
> other one is writable to keep a single source of truth.
> h1. Design
> Yes. EnforceReadOnlyDatabaseHook class implements ExecuteWithHookContext
> interface. hive.exec.pre.hooks needs to have the class name to initiate an
> instance. The "readonly" database property can be configured to turn it on
> and off.
> Allowed operations prefixes
> * EXPLAIN
> * USE(or SWITCHDATABASE)
> * REPLDUMP
> * REPLSTATUS
> * EXPORT
> * KILL_QUERY
> * DESC
> * SHOW
> h1. Tests
> * read_only_hook.q: USE, SHOW, DESC, DESCRIBE, EXPLAIN, SELECT
> * read_only_delete.q
> * read_only_insert.q
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