select
  -- array expr
  array[1,2],
  array(select 1),
  array[[1,2],[3,4]],
  -- between expr
  2  between  1  and  3,
  2  not  between  1  and  3,
  2  between  symmetric  1  and  3,
  -- bin expr
  1 + 1,
  2@@@2,
  -- call expr
  date_trunc('month', now()),
  -- case expr
  case when x > 1 then 1 else 0 end ,
  -- cast expr
  cast(1 as int8),
  treat(2 as bigint),
  1::int8,
  int8 '1',
  -- field expr
  foo.bar,
  -- index expr
  a[1],
  -- literal
  42,
  -- name ref
  foo,
  -- paren expr
  (1),
  -- postfix expr
  1  isnull,
  2  notnull,
  x  is  json,
  x  is  json  with  unique  keys,
  x  is  json  without  unique  keys,
  x  is  json  array,
  x  is  json  array  with  unique  keys,
  x  is  json  object,
  x  is  json  scalar,
  x  is  json  value,
  x  is  normalized,
  x  is  nfc  normalized,
  x  is  not  json,
  x  is  not  json  array,
  x  is  not  json  object,
  x  is  not  json  scalar,
  x  is  not  json  value,
  x  is  not  normalized,
  x  is  not  nfkd  normalized,
  -- prefix expr
  @-@ 10,
  -- slice expr
  c[:2][2:],
  -- tuple expr
  (1, 2, 3);
