SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 3)
    Literal \'aes-256-ecb\' (alias mode)
    Function unhex (alias ciphertext) (children 1)
     ExpressionList (children 1)
      Literal \'D1B43643E1D0E9390E39BA4EAE150851\'
    Literal \'test_key________________________\' (alias key)
   ExpressionList (children 2)
    Identifier mode
    Function decrypt (children 1)
     ExpressionList (children 3)
      Identifier mode
      Function toNullable (children 1)
       ExpressionList (children 1)
        Identifier ciphertext
      Identifier key