Add more documentation and tests for publications

Add/correct documentation and add some tests related to how access
control around adding tables to publications works.

doc/src/sgml/logical-replication.sgml

@@ -307,6 +307,12 @@
    privilege in the database.
   </para>
 
+  <para>
+   To add tables to a publication, the user must have ownership rights on the
+   table.  To create a publication that publishes all tables automatically,
+   the user must be a superuser.
+  </para>
+
   <para>
    To create a subscription, the user must be a superuser.
   </para>

doc/src/sgml/ref/create_publication.sgml

@@ -143,9 +143,9 @@ CREATE PUBLICATION <replaceable class="parameter">name</replaceable>
   </para>
 
   <para>
-   To add a table to a publication, the invoking user must have
-   <command>SELECT</command> privilege on given table.  The
-   <command>FOR ALL TABLES</command> clause requires superuser.
+   To add a table to a publication, the invoking user must have ownership
+   rights on the table.  The <command>FOR ALL TABLES</command> clause requires
+   the invoking user to be a superuser.
   </para>
 
   <para>

src/test/regress/expected/publication.out

@@ -2,6 +2,7 @@
 -- PUBLICATION
 --
 CREATE ROLE regress_publication_user LOGIN SUPERUSER;
+CREATE ROLE regress_publication_user2;
 CREATE ROLE regress_publication_user_dummy LOGIN NOSUPERUSER;
 SET SESSION AUTHORIZATION 'regress_publication_user';
 CREATE PUBLICATION testpub_default;
@@ -140,6 +141,23 @@ Publications:
     "testpib_ins_trunct"
     "testpub_fortbl"
 
+-- permissions
+SET ROLE regress_publication_user2;
+CREATE PUBLICATION testpub2;  -- fail
+ERROR:  permission denied for database regression
+SET ROLE regress_publication_user;
+GRANT CREATE ON DATABASE regression TO regress_publication_user2;
+SET ROLE regress_publication_user2;
+CREATE PUBLICATION testpub2;  -- ok
+ALTER PUBLICATION testpub2 ADD TABLE testpub_tbl1;  -- fail
+ERROR:  must be owner of relation testpub_tbl1
+SET ROLE regress_publication_user;
+GRANT regress_publication_user TO regress_publication_user2;
+SET ROLE regress_publication_user2;
+ALTER PUBLICATION testpub2 ADD TABLE testpub_tbl1;  -- ok
+DROP PUBLICATION testpub2;
+SET ROLE regress_publication_user;
+REVOKE CREATE ON DATABASE regression FROM regress_publication_user2;
 DROP VIEW testpub_view;
 DROP TABLE testpub_tbl1;
 \dRp+ testpub_default
@@ -168,5 +186,5 @@ DROP PUBLICATION testpub_fortbl;
 DROP SCHEMA pub_test CASCADE;
 NOTICE:  drop cascades to table pub_test.testpub_nopk
 RESET SESSION AUTHORIZATION;
-DROP ROLE regress_publication_user;
+DROP ROLE regress_publication_user, regress_publication_user2;
 DROP ROLE regress_publication_user_dummy;

src/test/regress/sql/publication.sql

@@ -2,6 +2,7 @@
 -- PUBLICATION
 --
 CREATE ROLE regress_publication_user LOGIN SUPERUSER;
+CREATE ROLE regress_publication_user2;
 CREATE ROLE regress_publication_user_dummy LOGIN NOSUPERUSER;
 SET SESSION AUTHORIZATION 'regress_publication_user';
 
@@ -69,6 +70,27 @@ ALTER PUBLICATION testpub_default DROP TABLE pub_test.testpub_nopk;
 
 \d+ testpub_tbl1
 
+-- permissions
+SET ROLE regress_publication_user2;
+CREATE PUBLICATION testpub2;  -- fail
+
+SET ROLE regress_publication_user;
+GRANT CREATE ON DATABASE regression TO regress_publication_user2;
+SET ROLE regress_publication_user2;
+CREATE PUBLICATION testpub2;  -- ok
+
+ALTER PUBLICATION testpub2 ADD TABLE testpub_tbl1;  -- fail
+
+SET ROLE regress_publication_user;
+GRANT regress_publication_user TO regress_publication_user2;
+SET ROLE regress_publication_user2;
+ALTER PUBLICATION testpub2 ADD TABLE testpub_tbl1;  -- ok
+
+DROP PUBLICATION testpub2;
+
+SET ROLE regress_publication_user;
+REVOKE CREATE ON DATABASE regression FROM regress_publication_user2;
+
 DROP VIEW testpub_view;
 DROP TABLE testpub_tbl1;
 
@@ -90,5 +112,5 @@ DROP PUBLICATION testpub_fortbl;
 DROP SCHEMA pub_test CASCADE;
 
 RESET SESSION AUTHORIZATION;
-DROP ROLE regress_publication_user;
+DROP ROLE regress_publication_user, regress_publication_user2;
 DROP ROLE regress_publication_user_dummy;