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 hasAll (children 1)
    ExpressionList (children 2)
     Identifier x
     Function materialize (children 1)
      ExpressionList (children 1)
       Literal Array_[UInt64_1, UInt64_2, UInt64_3]
 Identifier Null
