SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 1)
   ExpressionList (children 2)
    Function toTypeName (children 1)
     ExpressionList (children 1)
      Function arrayAvg (children 1)
       ExpressionList (children 1)
        Function array (children 1)
         ExpressionList (children 1)
          Function toFloat32 (children 1)
           ExpressionList (children 1)
            Literal UInt64_0
    Function toTypeName (children 1)
     ExpressionList (children 1)
      Function arrayAvg (children 1)
       ExpressionList (children 1)
        Function array (children 1)
         ExpressionList (children 1)
          Function toFloat64 (children 1)
           ExpressionList (children 1)
            Literal UInt64_0