SelectWithUnionQuery (children 1)
 ExpressionList (children 1)
  SelectQuery (children 4)
   ExpressionList (children 1)
    Literal \'w\\0\\0ldworldwo\\0l\\0world\'
   TablesInSelectQuery (children 1)
    TablesInSelectQueryElement (children 1)
     TableExpression (children 1)
      TableIdentifier grouping_sets
   ExpressionList (children 3)
    ExpressionList (children 1)
     Identifier fact_4_id
    ExpressionList (children 1)
     Literal NULL
    ExpressionList (children 2)
     Identifier fact_3_id
     Identifier fact_4_id
   ExpressionList (children 9)
    OrderByElement (children 1)
     Literal NULL
    OrderByElement (children 1)
     Literal NULL
    OrderByElement (children 1)
     Identifier fact_3_id
    OrderByElement (children 1)
     Identifier fact_3_id
    OrderByElement (children 1)
     Literal \'wo\\0ldworldwo\\0ldworld\'
    OrderByElement (children 1)
     Literal \'w\\0\\0ldworldwo\\0l\\0world\'
    OrderByElement (children 1)
     Literal \'wo\\0ldworldwo\\0ldworld\'
    OrderByElement (children 1)
     Literal NULL
    OrderByElement (children 1)
     Identifier fact_4_id
