================================================================================
integer
================================================================================
do $$ begin
for foo in 1..10 loop select 1; end loop;
end $$;
--------------------------------------------------------------------------------

(source_file
  (do_block
    (block
      (dollar_quote)
      (body
        (for_statement
          (identifier)
          (number)
          (number)
          (select_statement
            (select_item
              (number)))))
      (dollar_quote))))

================================================================================
integer by step
================================================================================
do $$ begin
for foo in 1..do_something() by 5 loop select 1; end loop;
end $$;
--------------------------------------------------------------------------------

(source_file
  (do_block
    (block
      (dollar_quote)
      (body
        (for_statement
          (identifier)
          (number)
          (function_call
            (identifier))
          (number)
          (select_statement
            (select_item
              (number)))))
      (dollar_quote))))

================================================================================
integer reverse
================================================================================
do $$ begin
for foo in reverse 10..1 by 5 loop select 1; end loop;
end $$;
--------------------------------------------------------------------------------

(source_file
  (do_block
    (block
      (dollar_quote)
      (body
        (for_statement
          (identifier)
          (number)
          (number)
          (number)
          (select_statement
            (select_item
              (number)))))
      (dollar_quote))))

================================================================================
for over query
================================================================================
do $$ begin
for foo, var in select generate_series(1,10) loop select 1; end loop;
end $$;
--------------------------------------------------------------------------------

(source_file
  (do_block
    (block
      (dollar_quote)
      (body
        (for_statement
          (identifier)
          (identifier)
          (select_statement
            (select_item
              (function_call
                (identifier)
                (number)
                (number))))
          (select_statement
            (select_item
              (number)))))
      (dollar_quote))))

================================================================================
for over execute
================================================================================
do $$ begin
for foo, var in execute format($sql$ select $1 from %1$s; $sql$, _foo) using bar loop select 1; end loop;
end $$;
--------------------------------------------------------------------------------

(source_file
  (do_block
    (block
      (dollar_quote)
      (body
        (for_statement
          (identifier)
          (identifier)
          (execute_statement
            (function_call
              (identifier)
              (dollar_quote_string)
              (identifier))
            (execute_using
              (identifier)))
          (select_statement
            (select_item
              (number)))))
      (dollar_quote))))