SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 5)
   ExpressionList (children 3)
    Identifier a
    Identifier b
    Function count (alias count) (children 1)
     ExpressionList (children 1)
      Asterisk
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier rollup_having
   ExpressionList (children 2)
    Identifier a
    Identifier b
   Function and (children 1)
    ExpressionList (children 2)
     Function isNotNull (children 1)
      ExpressionList (children 1)
       Identifier a
     Function isNotNull (children 1)
      ExpressionList (children 1)
       Identifier b
   ExpressionList (children 3)
    OrderByElement (children 1)
     Identifier a
    OrderByElement (children 1)
     Identifier b
    OrderByElement (children 1)
     Identifier count