SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 3)
    Literal \'aes-256-ecb\' (alias mode)
    Literal \'Hello World!\' (alias plaintext)
    Literal \'test_key________________________\' (alias key)
   ExpressionList (children 1)
    Function hex (children 1)
     ExpressionList (children 1)
      Function aes_encrypt_mysql (children 1)
       ExpressionList (children 3)
        Identifier mode
        Function toNullable (children 1)
         ExpressionList (children 1)
          Identifier plaintext
        Identifier key