SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 2)
    Function avgWeighted (alias t) (children 1)
     ExpressionList (children 2)
      Function toNullable (children 1)
       ExpressionList (children 1)
        Identifier number
      Function if (children 1)
       ExpressionList (children 3)
        Function less (children 1)
         ExpressionList (children 2)
          Identifier number
          Literal UInt64_500
        Literal NULL
        Identifier number
    Function toTypeName (children 1)
     ExpressionList (children 1)
      Identifier t
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      Function numbers (children 1)
       ExpressionList (children 1)
        Literal UInt64_1000