SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 4)
    Literal \'aes-256-gcm\' (alias mode)
    Function unhex (alias ciphertext) (children 1)
     ExpressionList (children 1)
      Literal \'219E6478A1A3BB5B686DA4BAD70323F192EFEDCCBBD6F49E78A7E2F6\'
    Literal \'test_key________________________\' (alias key)
    Literal \'test_iv_____\' (alias iv)
   ExpressionList (children 2)
    Identifier mode
    Function decrypt (children 1)
     ExpressionList (children 4)
      Identifier mode
      Function toNullable (children 1)
       ExpressionList (children 1)
        Identifier ciphertext
      Identifier key
      Identifier iv