CREATE FUNCTION start() RETURNS void AS
$$
  pljs.elog(NOTICE, 'start function executed');
  pljs.current_scope = {
    "name": "current_scope"
  };
$$ LANGUAGE pljs;
SET pljs.start_proc = 'start';
DO $$ pljs.elog(NOTICE, pljs.current_scope.name); $$ language pljs;
NOTICE:  start function executed
NOTICE:  current_scope
-- setting a start proc after the context is created should change do anything
SET pljs.start_proc = 'end';
DO $$ pljs.elog(NOTICE, pljs.current_scope.name); $$ language pljs;
NOTICE:  current_scope
-- a missing start proc should cause an error
-- force the creation of a new context
CREATE ROLE new_context;
SET ROLE new_context;
SET pljs.start_proc = 'end';
DO $$ pljs.elog(NOTICE, pljs.current_scope.name); $$ language pljs;
WARNING:  failed to find pljs function function "end" does not exist: 
ERROR:  execution error
DETAIL:  TypeError: cannot read property 'name' of undefined
    at <anonymous> (<function>:1:52)
    at <eval> (<function>:1:62)

RESET ROLE;
DROP ROLE new_context;
-- reset the start_proc
SET pljs.start_proc = '';
DROP FUNCTION start;
-- test startup permissions failure
CREATE FUNCTION start() RETURNS void AS $$ pljs.elog(NOTICE, 'nope'); $$ LANGUAGE pljs;
CREATE ROLE someone_else;
REVOKE EXECUTE ON FUNCTION start() FROM public;
SET pljs.start_proc = 'start';
REVOKE EXECUTE ON FUNCTION start() FROM public;
SET ROLE TO someone_else;
DO $$ pljs.elog(NOTICE, 'hello') $$ LANGUAGE pljs;
WARNING:  failed to find or no permission for js function start
NOTICE:  hello
RESET ROLE;
DROP ROLE someone_else;
RESET pljs.start_proc;
DROP FUNCTION start;