SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 2)
   ExpressionList (children 2)
    Literal \'serialized state is used\'
    Function sequenceMatchMerge (alias seq) (children 2)
     ExpressionList (children 1)
      Identifier seq
     ExpressionList (children 1)
      Literal \'(?1)(?2)\'
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier 02713_seqt
