feat: add config db-hoisted-tx-settings to allow only hoisted function settings

test/io/fixtures.sql

@@ -1,4 +1,3 @@
--- \ir big_schema.sql big schema test currently skipped, see test_io.py
 \ir db_config.sql
 
 set check_function_bodies = false; -- to allow conditionals based on the pg version
@@ -203,13 +202,27 @@ create function get_postgres_version() returns int as $$
   select current_setting('server_version_num')::int;
 $$ language sql;
 
-create or replace function work_mem_test() returns text as $$
-  select current_setting('work_mem',false);
-$$ language sql set work_mem = '6000kB';
+create or replace function rpc_work_mem() returns items as $$
+  select 1
+$$ language sql
+set work_mem = '6000';
 
-create or replace function multiple_func_settings_test() returns setof record as $$
-  select current_setting('work_mem',false) as work_mem,
-         current_setting('statement_timeout',false) as statement_timeout;
+create or replace function rpc_with_one_hoisted() returns items as $$
+  select 1
+$$ language sql
+set work_mem = '3000'
+set statement_timeout = '7s';
+
+create or replace function rpc_with_two_hoisted() returns items as $$
+  select 1
 $$ language sql
 set work_mem = '5000'
 set statement_timeout = '10s';
+
+create function get_work_mem(items) returns text as $$
+  select current_setting('work_mem', true) as work_mem
+$$ language sql;
+
+create function get_statement_timeout(items) returns text as $$
+  select current_setting('statement_timeout', true) as statement_timeout
+$$ language sql;