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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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Stamatis Zampetakis updated HIVE-26555:
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Fix Version/s: (was: 4.0.0-alpha-2)
I cleared the fixVersion field since this ticket is not resolved. Please review
this ticket and if the fix is already committed to a specific version please
set the version accordingly and mark the ticket as RESOLVED.
According to the JIRA guidelines
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> Read-only mode for Hive database
> --------------------------------
>
> 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: 1h
> 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. User-Facing Changes
> 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.
> h2. Allowed read operations
> All read operations without any data/metadata change are allowed.
> * EXPLAIN
> * USE(or SWITCHDATABASE)
> * REPLDUMP
> * REPLSTATUS
> * EXPORT
> * KILL_QUERY
> * DESC prefix
> * SHOW prefix
> * QUERY with SELECT or EXPLAIN. INSERT, DELETE, UPDATE are disallowed.
> h2. Allowed write operations
> Most of write operations that change data/metadata are disallowed. There are
> few allowed exceptions. The first one is alter database to make a database
> writable. The second one is replication load to load a dumped database.
> * ALTER DATABASE db_name SET DBPROPERTIES without "readonly"="true".
> * REPLLOAD
> h1. Tests
> * read_only_hook.q: USE, SHOW, DESC, DESCRIBE, EXPLAIN, SELECT
> * read_only_delete.q
> * read_only_insert.q
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