| [Overview][Constants][Types][Classes][Procedures and functions][Variables][Index] |
Roll back all changes made in the current transaction.
Source position: sqldb.pp line 296
public procedure TSQLTransaction.Rollback; override; |
Rollback undoes all changes in the databack since the start of the transaction. It can only be executed in an active transaction.
After this, the transaction is no longer active. To undo changes but keep an active transaction, execute RollbackRetaining instead.
| Remark: | Changes posted in datasets that are coupled to this transaction will not be undone in memory: these datasets must be reloaded from the database (using Close and Open to reload the data as it is in the database. |
Executing Rollback when no transaction is active will result in an exception. A transaction must be started by calling StartTransaction. If the database backend reports an error, an exception is raised as well.
|
Start a new transaction |
|
|
Commit the transaction, retain transaction context. |
|
|
Commit the transaction, end transaction context. |
|
|
Roll back changes made in the transaction, keep transaction context. |