sys.rollback()

Purpose:

sys.rollback() rolls back a 4C transaction.

Usage:

ret = sys.rollback(<tname>);

Arguments:

alpha <tname> - A program specific name for the transaction. This name must be the same used that started the transaction.

Returns:

0 - Transaction rolled back

-1 - The transaction specified by <tname> does not exist

Where Used:

sys.rollback() can be called from anywhere, but it can only rollback a transaction started within the same 4C program.

When possible you should try to use sys.rollback() within the same PCL that called sys.begin().

Example:

See sys.begin() for example code.

Description:

sys.rollback() rolls back the transaction specified by <tname> as well as any nested transactions. Only explicit transactions started by the application can be rolled back by the application and the transaction must have been started by the same 4C program that calls sys.rollback(). You cannot start transaction, "T1", in programA, push ProgramB and roll back the transaction, "T1", in progranB.

Bugs/Features/Comments:

See the discussion in External Database Files for more details on 4C transactions.

See Also:

sys.begin()

sys.commit()

External Database Files