The following lines contain the word 'select', 'insert', 'update' or 'delete':
select upper(queue_name), upper(name)
into x_queue_name, x_agent_name
from wf_agents
where guid = p_agent_guid;
select agt.queue_name into x_out_queue
from wf_agents agt,
wf_systems sys
where agt.name = x_out_agent_name
and sys.name = x_out_system_name
and sys.guid = agt.system_guid;