SelectWithUnionQuery (children 2)
 ExpressionList (children 1)
  SelectQuery (children 3)
   ExpressionList (children 1)
    Function count (children 1)
     ExpressionList
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier bftest
   Function or (children 1)
    ExpressionList (children 2)
     Function has (children 1)
      ExpressionList (children 2)
       Identifier x
       Literal UInt64_42
     Function has (children 1)
      ExpressionList (children 2)
       Identifier x
       Literal Int64_-42
 Identifier Null
