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Reintroduce MAINTAIN privilege and pg_maintain predefined role.

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Roles with MAINTAIN on a relation may run VACUUM, ANALYZE, REINDEX,
REFRESH MATERIALIZE VIEW, CLUSTER, and LOCK TABLE on the relation.
Roles with privileges of pg_maintain may run those same commands on
all relations.

This was previously committed for v16, but it was reverted in
commit 151c22deee due to concerns about search_path tricks that
could be used to escalate privileges to the table owner.  Commits
2af07e2f74, 59825d1639, and c7ea3f4229 resolved these concerns by
restricting search_path when running maintenance commands.

Bumps catversion.

Reviewed-by: Jeff Davis
Discussion: https://postgr.es/m/20240305161235.GA3478007%40nathanxps13
This commit is contained in:
Nathan Bossart
2024-03-13 14:49:26 -05:00
parent 2041bc4276
commit ecb0fd3372
42 changed files with 457 additions and 180 deletions
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3
doc/src/sgml/ref/grant.sgml
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@@ -21,7 +21,7 @@ PostgreSQL documentation
<refsynopsisdiv>
<synopsis>
GRANT { { SELECT | INSERT | UPDATE | DELETE | TRUNCATE | REFERENCES | TRIGGER }
GRANT { { SELECT | INSERT | UPDATE | DELETE | TRUNCATE | REFERENCES | TRIGGER | MAINTAIN }
[, ...] | ALL [ PRIVILEGES ] }
ON { [ TABLE ] <replaceable class="parameter">table_name</replaceable> [, ...]
| ALL TABLES IN SCHEMA <replaceable class="parameter">schema_name</replaceable> [, ...] }
@@ -193,6 +193,7 @@ GRANT <replaceable class="parameter">role_name</replaceable> [, ...] TO <replace
<term><literal>USAGE</literal></term>
<term><literal>SET</literal></term>
<term><literal>ALTER SYSTEM</literal></term>
<term><literal>MAINTAIN</literal></term>
<listitem>
<para>
Specific types of privileges, as defined in <xref linkend="ddl-priv"/>.