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bool
mysql_rollback(MYSQL *mysql)
Rolls back the current transaction.
The action of this function is subject to the value of the
completion_type
system
variable. In particular, if the value of
completion_type
is
RELEASE
(or 2), the server performs a
release after terminating a transaction and closes the client
connection. Call mysql_close()
from the client program to close the connection from the
client side.