function islower(s)
  return string.lower(s) == s
end
struct = {
  'array',
  {
    'struct',
    {
      a = 'string',
      b = 'bool',
      c = 'int32',
      d = {'array', 'number', maxlen=1000},
      e = 'any',
      f = {
        'variant',
        'string',
        {'array', 'string'},
      },
      g = {'string', check=islower},
    },
    userkeys = false,
  },
}
function (t)
  tcheck(t, struct)
end

local t, query, result = ...
return { 
      -- function: test(raz char 'default', dva int[0][10] ) --
      test = {{ raz = t.char('default'), dva = t.int[0][10] }, function(api, argv)
            query = api.db_link:query("select 1 as one, 'test' as two, ? as three, ? as four", argv.raz, argv.dva)
            return true, query[1]
      end},
}