select o.url, convert_from(def.name, 'utf-8') 
from origin o 
  inner join occurrence occ on (occ.origin=o.id and occ.branch='refs/heads/master')
  inner join revision rev on (occ.target_type='revision' and occ.target=rev.id)
  inner join directory dir on rev.directory=dir.id
  inner join directory_entry_file def on def.id = any(dir.file_entries) 
where o.type='git' and def.name='pom.xml';