================================================================================
get diagnostics
================================================================================
DO $$
BEGIN
    get current diagnostics foo = ROW_COUNT;
    get diagnostics bar := ROW_COUNT;
END
$$;
--------------------------------------------------------------------------------

(source_file
  (do_block
    (block
      (dollar_quote)
      (body
        (get_diagnostics_statement
          (assign_statement
            (identifier)
            (identifier)))
        (get_diagnostics_statement
          (assign_statement
            (identifier)
            (identifier))))
      (dollar_quote))))