SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 7)
    Literal \'constants:\'
    Literal NULL
    Function byteSize (children 1)
     ExpressionList (children 1)
      Literal NULL
    Function tuple (children 1)
     ExpressionList (children 2)
      Literal UInt64_65536
      Literal NULL
    Function byteSize (children 1)
     ExpressionList (children 1)
      Function tuple (children 1)
       ExpressionList (children 2)
        Literal UInt64_65536
        Literal NULL
    Function tuple (children 1)
     ExpressionList (children 2)
      Literal UInt64_65536
      Function toNullable (children 1)
       ExpressionList (children 1)
        Literal \'a\'
    Function byteSize (children 1)
     ExpressionList (children 1)
      Function tuple (children 1)
       ExpressionList (children 2)
        Literal UInt64_65536
        Function toNullable (children 1)
         ExpressionList (children 1)
          Literal \'a\'
