Clean up duplicate role and schema names in regression tests.

Since these names are global, using the same ones in different regression
tests creates a hazard of test failures if any two such scripts run
concurrently.  Let's establish a policy of not doing that.  In the cases
where a conflict existed, I chose to rename both sides: in principle one
script or the other could've been left in possession of the common name,
but that seems to just invite more trouble of the same sort.

There are a number of places where scripts are using names that seem
unduly generic, but in the absence of actual conflicts I left them alone.

In addition, fix insert.sql's use of "someone_else" as a role name.
That's a flat out violation of longstanding project policy, so back-patch
that change to v10 where the usage appeared.  The rest of this is just
future-proofing, as no two of these scripts are actually run concurrently
in the existing parallel_schedule.

Conflicts of schema-qualified names also exist, but will be dealt with
separately.

Discussion: https://postgr.es/m/4627.1521070268@sss.pgh.pa.us

Author: tglsfdc

src/test/regress/expected/alter_generic.out

@@ -3,9 +3,9 @@
 --
 -- Clean up in case a prior regression run failed
 SET client_min_messages TO 'warning';
-DROP ROLE IF EXISTS regress_alter_user1;
+DROP ROLE IF EXISTS regress_alter_table_user1;
 RESET client_min_messages;
-CREATE USER regress_alter_user1;
+CREATE USER regress_alter_table_user1;
 --
 -- add attribute
 --
@@ -216,14 +216,14 @@ ALTER INDEX IF EXISTS __tmp_onek_unique1 RENAME TO onek_unique1;
 NOTICE:  relation "__tmp_onek_unique1" does not exist, skipping
 ALTER INDEX onek_unique1 RENAME TO tmp_onek_unique1;
 ALTER INDEX tmp_onek_unique1 RENAME TO onek_unique1;
-SET ROLE regress_alter_user1;
+SET ROLE regress_alter_table_user1;
 ALTER INDEX onek_unique1 RENAME TO fail;  -- permission denied
 ERROR:  must be owner of index onek_unique1
 RESET ROLE;
 -- renaming views
 CREATE VIEW tmp_view (unique1) AS SELECT unique1 FROM tenk1;
 ALTER TABLE tmp_view RENAME TO tmp_view_new;
-SET ROLE regress_alter_user1;
+SET ROLE regress_alter_table_user1;
 ALTER VIEW tmp_view_new RENAME TO fail;  -- permission denied
 ERROR:  must be owner of view tmp_view_new
 RESET ROLE;
@@ -3890,4 +3890,4 @@ ALTER TABLE tmp ALTER COLUMN i SET (n_distinct = 1, n_distinct_inherited = 2);
 ALTER TABLE tmp ALTER COLUMN i RESET (n_distinct_inherited);
 ANALYZE tmp;
 DROP TABLE tmp;
-DROP USER regress_alter_user1;
+DROP USER regress_alter_table_user1;

src/test/regress/expected/alter_table.out

@@ -129,15 +129,15 @@ ERROR:  testfunc1(integer) is not a procedure
 DROP PROCEDURE nonexistent();
 ERROR:  procedure nonexistent() does not exist
 -- privileges
-CREATE USER regress_user1;
-GRANT INSERT ON cp_test TO regress_user1;
+CREATE USER regress_cp_user1;
+GRANT INSERT ON cp_test TO regress_cp_user1;
 REVOKE EXECUTE ON PROCEDURE ptest1(text) FROM PUBLIC;
-SET ROLE regress_user1;
+SET ROLE regress_cp_user1;
 CALL ptest1('a');  -- error
 ERROR:  permission denied for procedure ptest1
 RESET ROLE;
-GRANT EXECUTE ON PROCEDURE ptest1(text) TO regress_user1;
-SET ROLE regress_user1;
+GRANT EXECUTE ON PROCEDURE ptest1(text) TO regress_cp_user1;
+SET ROLE regress_cp_user1;
 CALL ptest1('a');  -- ok
 RESET ROLE;
 -- ROUTINE syntax
@@ -150,4 +150,4 @@ DROP ROUTINE testfunc1(int);
 DROP PROCEDURE ptest1;
 DROP PROCEDURE ptest2;
 DROP TABLE cp_test;
-DROP USER regress_user1;
+DROP USER regress_cp_user1;

src/test/regress/expected/create_procedure.out

@@ -83,7 +83,7 @@ CREATE VIEW temp_view_test.v3_temp AS SELECT * FROM temp_table;
 NOTICE:  view "v3_temp" will be a temporary view
 ERROR:  cannot create temporary relation in non-temporary schema
 -- should fail
-CREATE SCHEMA test_schema
+CREATE SCHEMA test_view_schema
     CREATE TEMP VIEW testview AS SELECT 1;
 ERROR:  cannot create temporary relation in non-temporary schema
 -- joins: if any of the join relations are temporary, the view

src/test/regress/expected/create_view.out

@@ -360,10 +360,10 @@ ALTER TABLE itest7 ALTER COLUMN a SET GENERATED BY DEFAULT;
 ALTER TABLE itest7 ALTER COLUMN a RESTART;
 ALTER TABLE itest7 ALTER COLUMN a DROP IDENTITY;
 -- privileges
-CREATE USER regress_user1;
+CREATE USER regress_identity_user1;
 CREATE TABLE itest8 (a int GENERATED ALWAYS AS IDENTITY, b text);
-GRANT SELECT, INSERT ON itest8 TO regress_user1;
-SET ROLE regress_user1;
+GRANT SELECT, INSERT ON itest8 TO regress_identity_user1;
+SET ROLE regress_identity_user1;
 INSERT INTO itest8 DEFAULT VALUES;
 SELECT * FROM itest8;
  a | b 
@@ -373,7 +373,7 @@ SELECT * FROM itest8;
 
 RESET ROLE;
 DROP TABLE itest8;
-DROP USER regress_user1;
+DROP USER regress_identity_user1;
 -- typed tables (currently not supported)
 CREATE TYPE itest_type AS (f1 integer, f2 text, f3 bigint);
 CREATE TABLE itest12 OF itest_type (f1 WITH OPTIONS GENERATED ALWAYS AS IDENTITY); -- error

src/test/regress/expected/identity.out

@@ -619,16 +619,16 @@ select tableoid::regclass, * from mlparted_def;
 -- appropriate key description (or none) in various situations
 create table key_desc (a int, b int) partition by list ((a+0));
 create table key_desc_1 partition of key_desc for values in (1) partition by range (b);
-create user someone_else;
-grant select (a) on key_desc_1 to someone_else;
-grant insert on key_desc to someone_else;
-set role someone_else;
+create user regress_insert_other_user;
+grant select (a) on key_desc_1 to regress_insert_other_user;
+grant insert on key_desc to regress_insert_other_user;
+set role regress_insert_other_user;
 -- no key description is shown
 insert into key_desc values (1, 1);
 ERROR:  no partition of relation "key_desc_1" found for row
 reset role;
-grant select (b) on key_desc_1 to someone_else;
-set role someone_else;
+grant select (b) on key_desc_1 to regress_insert_other_user;
+set role regress_insert_other_user;
 -- key description (b)=(1) is now shown
 insert into key_desc values (1, 1);
 ERROR:  no partition of relation "key_desc_1" found for row
@@ -637,9 +637,9 @@ DETAIL:  Partition key of the failing row contains (b) = (1).
 insert into key_desc values (2, 1);
 ERROR:  no partition of relation "key_desc" found for row
 reset role;
-revoke all on key_desc from someone_else;
-revoke all on key_desc_1 from someone_else;
-drop role someone_else;
+revoke all on key_desc from regress_insert_other_user;
+revoke all on key_desc_1 from regress_insert_other_user;
+drop role regress_insert_other_user;
 drop table key_desc, key_desc_1;
 -- test minvalue/maxvalue restrictions
 create table mcrparted (a int, b int, c int) partition by range (a, abs(b), c);

src/test/regress/expected/insert.out

@@ -1,7 +1,7 @@
 --
 -- Regression tests for schemas (namespaces)
 --
-CREATE SCHEMA test_schema_1
+CREATE SCHEMA test_ns_schema_1
        CREATE UNIQUE INDEX abc_a_idx ON abc (a)
        CREATE VIEW abc_view AS
               SELECT a+1 AS a, b+1 AS b FROM abc
@@ -11,59 +11,59 @@ CREATE SCHEMA test_schema_1
        );
 -- verify that the objects were created
 SELECT COUNT(*) FROM pg_class WHERE relnamespace =
-    (SELECT oid FROM pg_namespace WHERE nspname = 'test_schema_1');
+    (SELECT oid FROM pg_namespace WHERE nspname = 'test_ns_schema_1');
  count 
 -------
      5
 (1 row)
 
-INSERT INTO test_schema_1.abc DEFAULT VALUES;
-INSERT INTO test_schema_1.abc DEFAULT VALUES;
-INSERT INTO test_schema_1.abc DEFAULT VALUES;
-SELECT * FROM test_schema_1.abc;
+INSERT INTO test_ns_schema_1.abc DEFAULT VALUES;
+INSERT INTO test_ns_schema_1.abc DEFAULT VALUES;
+INSERT INTO test_ns_schema_1.abc DEFAULT VALUES;
+SELECT * FROM test_ns_schema_1.abc;
  a | b 
 ---+---
  1 |  
  2 |  
  3 |  
 (3 rows)
 
-SELECT * FROM test_schema_1.abc_view;
+SELECT * FROM test_ns_schema_1.abc_view;
  a | b 
 ---+---
  2 |  
  3 |  
  4 |  
 (3 rows)
 
-ALTER SCHEMA test_schema_1 RENAME TO test_schema_renamed;
+ALTER SCHEMA test_ns_schema_1 RENAME TO test_ns_schema_renamed;
 SELECT COUNT(*) FROM pg_class WHERE relnamespace =
-    (SELECT oid FROM pg_namespace WHERE nspname = 'test_schema_1');
+    (SELECT oid FROM pg_namespace WHERE nspname = 'test_ns_schema_1');
  count 
 -------
      0
 (1 row)
 
 -- test IF NOT EXISTS cases
-CREATE SCHEMA test_schema_renamed; -- fail, already exists
-ERROR:  schema "test_schema_renamed" already exists
-CREATE SCHEMA IF NOT EXISTS test_schema_renamed; -- ok with notice
-NOTICE:  schema "test_schema_renamed" already exists, skipping
-CREATE SCHEMA IF NOT EXISTS test_schema_renamed -- fail, disallowed
+CREATE SCHEMA test_ns_schema_renamed; -- fail, already exists
+ERROR:  schema "test_ns_schema_renamed" already exists
+CREATE SCHEMA IF NOT EXISTS test_ns_schema_renamed; -- ok with notice
+NOTICE:  schema "test_ns_schema_renamed" already exists, skipping
+CREATE SCHEMA IF NOT EXISTS test_ns_schema_renamed -- fail, disallowed
        CREATE TABLE abc (
               a serial,
               b int UNIQUE
        );
 ERROR:  CREATE SCHEMA IF NOT EXISTS cannot include schema elements
 LINE 2:        CREATE TABLE abc (
                ^
-DROP SCHEMA test_schema_renamed CASCADE;
+DROP SCHEMA test_ns_schema_renamed CASCADE;
 NOTICE:  drop cascades to 2 other objects
-DETAIL:  drop cascades to table test_schema_renamed.abc
-drop cascades to view test_schema_renamed.abc_view
+DETAIL:  drop cascades to table test_ns_schema_renamed.abc
+drop cascades to view test_ns_schema_renamed.abc_view
 -- verify that the objects were dropped
 SELECT COUNT(*) FROM pg_class WHERE relnamespace =
-    (SELECT oid FROM pg_namespace WHERE nspname = 'test_schema_renamed');
+    (SELECT oid FROM pg_namespace WHERE nspname = 'test_ns_schema_renamed');
  count 
 -------
      0