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().
返回值
Returns the current autocommit status, as a boolean.