Returns the current autocommit status.
link_identifier
A FrontBase link identifier returned by fbsql_connect() or fbsql_pconnect().
If optional and not specified, the function will try to find an open link to the FrontBase server and if no such link is found it will try to create one as if fbsql_connect() was called with no arguments
OnOff
If this optional parameter is given the auto commit status will be changed.
With OnOff
set to TRUE each statement will be
committed automatically, if no errors was found.
With OnOff set to FALSE the user must commit or rollback the transaction using either fbsql_commit() or fbsql_rollback().