1 min read
Void Transaction
Transaction Function Definition:
“`cvoid transaction(){ // Begin the transaction begin_transaction();
// Perform operations within the transaction// Example: update customer account balance// Commit the transactioncommit_transaction();// Handle any errors during the transactionif (error()){ // Rollback the transaction rollback_transaction();}
}“`
Explanation:
- begin_transaction(): Starts a new transaction.
- commit_transaction(): Commits the transaction and makes it permanent.
- rollback_transaction(): Rolls back the transaction if there are errors.
- error(): Checks if there are any errors during the transaction.
Example:
“`cvoid transfer_money(int from_account, int to_account, int amount){ transaction();
// Update the account balancesupdate_account_balance(from_account, -amount);update_account_balance(to_account, amount);// Commit the transactioncommit_transaction();
}“`
In this example, the transfer_money()
function uses a transaction to ensure that the account balances are updated atomically. If there are errors during the transaction, the whole transaction will be rolled back, preventing inconsistent data.
Notes:
- Transactions can improve data consistency and prevent race conditions.
- Transactions are usually used in multithreaded environments.
- The specific implementation of
begin_transaction()
,commit_transaction()
, androllback_transaction()
depends on the transactional system being used. - Transactions can have a performance overhead, so they should be used sparingly.