The following lines contain the word 'select', 'insert', 'update' or 'delete':
SELECT 'Y'
INTO x_exists
FROM dual
WHERE EXISTS (SELECT 1
from WIP_REQUIREMENT_OPERATIONS
where wip_entity_id = p_wip_entity_id
and organization_id = p_organization_id
and operation_seq_num = p_operation_seq_num
and NVL(repetitive_schedule_id, -1) = NVL(p_rep_schedule_id, -1));