Method transact_rollback

Method: transact_rollback()

Turkce Dokumantasyon | English Documentation

Category: Transaction & Concurrency Methods
Submodule: AmberDB::Transact
Entry Type: Transaction Rollback

---

1. Definition and Overview

transact_rollback() forces an immediate manual rollback of the active transaction. It reads the active .txn journal file and reverts all inserted, modified, or deleted records in LIFO reverse order, restoring all tables and secondary indexes to their exact pre-transaction state.

---

2. Syntax and Signature

$adb->transact_rollback();

---

3. Practical Code Example

$adb->transact_start();
eval {
    # Risky sequence
    $adb->modify_id("accounts", @acc1);
    die "Validation failure\n" if $invalid_condition;
    $adb->modify_id("accounts", @acc2);
    $adb->transact_end();
};
if ($@) {
    $adb->transact_rollback();
}

---

4. See Also

• Concept: Undo Journal Rollback
• Method: transact_start
• Method: transact_end
• File: .txn (Undo Journal)