SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 9)
    Literal \'constants:\'
    Function tuple (children 1)
     ExpressionList (children 2)
      Literal NULL
      Function array (children 1)
       ExpressionList
    Function byteSize (children 1)
     ExpressionList (children 1)
      Function tuple (children 1)
       ExpressionList (children 2)
        Literal NULL
        Function array (children 1)
         ExpressionList
    Function tuple (children 1)
     ExpressionList (children 2)
      Function toNullable (children 1)
       ExpressionList (children 1)
        Function toFixedString (children 1)
         ExpressionList (children 2)
          Literal \'a\'
          Literal UInt64_4
      Function array (children 1)
       ExpressionList
    Function byteSize (children 1)
     ExpressionList (children 1)
      Function tuple (children 1)
       ExpressionList (children 2)
        Function toNullable (children 1)
         ExpressionList (children 1)
          Function toFixedString (children 1)
           ExpressionList (children 2)
            Literal \'a\'
            Literal UInt64_4
        Function array (children 1)
         ExpressionList
    Function tuple (children 1)
     ExpressionList (children 2)
      Function toNullable (children 1)
       ExpressionList (children 1)
        Function toFixedString (children 1)
         ExpressionList (children 2)
          Literal \'a\'
          Literal UInt64_4
      Function array (children 1)
       ExpressionList (children 1)
        Function tuple (children 1)
         ExpressionList (children 2)
          Literal NULL
          Literal \'a\'
    Function byteSize (children 1)
     ExpressionList (children 1)
      Function tuple (children 1)
       ExpressionList (children 2)
        Function toNullable (children 1)
         ExpressionList (children 1)
          Function toFixedString (children 1)
           ExpressionList (children 2)
            Literal \'a\'
            Literal UInt64_4
        Function array (children 1)
         ExpressionList (children 1)
          Function tuple (children 1)
           ExpressionList (children 2)
            Literal NULL
            Literal \'a\'
    Function tuple (children 1)
     ExpressionList (children 2)
      Function toFixedString (children 1)
       ExpressionList (children 2)
        Literal \'a\'
        Literal UInt64_4
      Function array (children 1)
       ExpressionList (children 2)
        Function tuple (children 1)
         ExpressionList (children 2)
          Literal NULL
          Literal \'a\'
        Function tuple (children 1)
         ExpressionList (children 2)
          Literal NULL
          Literal \'a\'
    Function byteSize (children 1)
     ExpressionList (children 1)
      Function tuple (children 1)
       ExpressionList (children 2)
        Function toNullable (children 1)
         ExpressionList (children 1)
          Function toFixedString (children 1)
           ExpressionList (children 2)
            Literal \'a\'
            Literal UInt64_4
        Function array (children 1)
         ExpressionList (children 2)
          Function tuple (children 1)
           ExpressionList (children 2)
            Literal NULL
            Literal \'a\'
          Function tuple (children 1)
           ExpressionList (children 2)
            Literal NULL
            Literal \'a\'
