Remove master/slave usage from plpgsql tests

Author: Dagfinn Ilmari Mannsåker <ilmari@ilmari.org>
Discussion: https://www.postgresql.org/message-id/flat/E393EC88-377F-4C59-A67A-69F2A38D17C7@yesql.se

src/pl/plpgsql/src/expected/plpgsql_trap.out

@@ -186,17 +186,17 @@ NOTICE:  should see this only if -100 fits in smallint
 --
 -- test foreign key error trapping
 --
-create temp table master(f1 int primary key);
-create temp table slave(f1 int references master deferrable);
-insert into master values(1);
-insert into slave values(1);
-insert into slave values(2);	-- fails
-ERROR:  insert or update on table "slave" violates foreign key constraint "slave_f1_fkey"
-DETAIL:  Key (f1)=(2) is not present in table "master".
+create temp table root(f1 int primary key);
+create temp table leaf(f1 int references root deferrable);
+insert into root values(1);
+insert into leaf values(1);
+insert into leaf values(2);	-- fails
+ERROR:  insert or update on table "leaf" violates foreign key constraint "leaf_f1_fkey"
+DETAIL:  Key (f1)=(2) is not present in table "root".
 create function trap_foreign_key(int) returns int as $$
 begin
 	begin	-- start a subtransaction
-		insert into slave values($1);
+		insert into leaf values($1);
 	exception
 		when foreign_key_violation then
 			raise notice 'caught foreign_key_violation';
@@ -238,8 +238,8 @@ begin;
 
   savepoint x;
     set constraints all immediate; -- fails
-ERROR:  insert or update on table "slave" violates foreign key constraint "slave_f1_fkey"
-DETAIL:  Key (f1)=(2) is not present in table "master".
+ERROR:  insert or update on table "leaf" violates foreign key constraint "leaf_f1_fkey"
+DETAIL:  Key (f1)=(2) is not present in table "root".
   rollback to x;
   select trap_foreign_key_2();  -- detects FK violation
 NOTICE:  caught foreign_key_violation
@@ -249,7 +249,7 @@ NOTICE:  caught foreign_key_violation
 (1 row)
 
 commit;				-- still fails
-ERROR:  insert or update on table "slave" violates foreign key constraint "slave_f1_fkey"
-DETAIL:  Key (f1)=(2) is not present in table "master".
+ERROR:  insert or update on table "leaf" violates foreign key constraint "leaf_f1_fkey"
+DETAIL:  Key (f1)=(2) is not present in table "root".
 drop function trap_foreign_key(int);
 drop function trap_foreign_key_2();

src/pl/plpgsql/src/sql/plpgsql_trap.sql

@@ -127,18 +127,18 @@ select test_variable_storage();
 -- test foreign key error trapping
 --
 
-create temp table master(f1 int primary key);
+create temp table root(f1 int primary key);
 
-create temp table slave(f1 int references master deferrable);
+create temp table leaf(f1 int references root deferrable);
 
-insert into master values(1);
-insert into slave values(1);
-insert into slave values(2);	-- fails
+insert into root values(1);
+insert into leaf values(1);
+insert into leaf values(2);	-- fails
 
 create function trap_foreign_key(int) returns int as $$
 begin
 	begin	-- start a subtransaction
-		insert into slave values($1);
+		insert into leaf values($1);
 	exception
 		when foreign_key_violation then
 			raise notice 'caught foreign_key_violation';