select ed.authority_issuing , ed."number", ed."date", p.number_of_proceeding, p.date_of_proceeding--, ced.content_name 
  from proceedings as p
 inner join proceedingsexecutive_documents as pd on (pd.id_proceeding_fk = p.id_proceeding)
 inner join executive_documents as ed on (ed.id_executive_document = pd.id_executive_document_fk)
 inner join content_executive_document as ced  on (ced.id_content = ed.id_content_fk)
 where p.number_of_proceeding  = '70417634960'

 inner join content_executive_document as ced on (LENGTH(regexp_matches(ced.content_name , ed.id_content_fk )::varchar) > 0)

inner join content_executive_document as ced  on ( position (',' || ed.id_content_fk || ','  in ',' || ced.id_content || ',') > 0)