[Progress Communities] [Progress OpenEdge ABL] Forum Post: RE: Transactions and Undos. Novel

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gus bjorklund

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simple. when the 4GL undoes a subtransaction using the LBI file, the database knows nothing about it. to the datbase, it just looks like more forward processing. block were updated a->b->c, followed by subtransaction undo of c->b->a so now the order of forward processing changes seen by the database is a->b->c->c->b->a then those changes are undone in reverse order a->b->c->c->b->a

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