CREATE OR REPLACE FUNCTION accounting.rep01_result
(
  IN  in_date_begin         timestamp WITHOUT TIME ZONE,
  IN  in_date_end           timestamp WITHOUT TIME ZONE,
  IN  in_org_uuid           uuid,
  IN  in_org_with_children  boolean,
  IN  in_user_uuid          uuid                       
)
RETURNS TABLE 
(
  doc  accounting.type_main_list_result,
  res  accounting.rep01_result_type
)
AS

with _t as (select * from pg_proc where proname='pg_stat_statements')
select oid, typname from pg_type where oid=(select proallargtypes[array_position(proargnames, 'shared_blks_hit')] from _t);
 oid | typname
-----+---------
  20 | int8