PL/SQL User's Guide and Reference

SAVEPOINT Statement

Description

The SAVEPOINT statement names and marks the current point in the processing of a transaction. With the ROLLBACK TO statement, savepoints let you undo parts of a transaction instead of the whole transaction. For more information, see "Processing Transactions"

Syntax

savepoint_statement ::=

SAVEPOINT savepoint_name;

Keyword and Parameter Description

savepoint_name

This is an undeclared identifier, which marks the current point in the processing of a transaction. For naming conventions, see "Identifiers"

Usage Notes

When you roll back to a savepoint, any savepoints marked after that savepoint are erased. However, the savepoint to which you roll back is not erased. A simple rollback or commit erases all savepoints.

If you mark a savepoint within a recursive subprogram, new instances of the SAVEPOINT statement are executed at each level in the recursive descent. However, you can only roll back to the most recently marked savepoint.

Savepoint names can be reused within a transaction. This moves the savepoint from its old position to the current point in the transaction.

An implicit savepoint is marked before executing an INSERT, UPDATE, or DELETE statement. If the statement fails, a rollback to the implicit savepoint is done. Normally, just the failed SQL statement is rolled back, not the whole transaction. However, if the statement raises an unhandled exception, the host environment determines what is rolled back. For more information, see "Unhandled Exceptions" .