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| -- Session 1 starts a transaction and does some work.
DECLARE
rc PLS_INTEGER;
oer PLS_INTEGER;
xae EXCEPTION;
BEGIN
rc := dbms_xa.xa_start(dbms_xa_xid(123), dbms_xa.tmnoflags);
IF rc != dbms_xa.xa_ok THEN
oer := dbms_xa.xa_getlastoer();
dbms_output.put_line('ORA-' || oer || ' occurred, XA_START failed');
RAISE xae;
ELSE
dbms_output.put_line('XA_START(new xid=123) OK');
END IF;
UPDATE employees
SET salary = salary * 1.1
WHERE employee_id = 100;
rc := dbms_xa.xa_end(dbms_xa_xid(123), dbms_xa.tmsuspend);
IF rc != dbms_xa.xa_ok THEN
oer := dbms_xa.xa_getlastoer();
dbms_output.put_line('ORA-' || oer || ' occurred, XA_END failed');
RAISE xae;
ELSE
dbms_output.put_line('XA_END(suspend xid=123) OK');
END IF;
EXCEPTION
WHEN OTHERS THEN
dbms_output.put_line('XA error('||rc||') occurred, rolling back the transaction ...');
rc := dbms_xa.xa_end(dbms_xa_xid(123), dbms_xa.tmsuccess);
rc := dbms_xa.xa_rollback(dbms_xa_xid(123));
IF rc != dbms_xa.xa_ok THEN
oer := dbms_xa.xa_getlastoer();
dbms_output.put_line('XA-' || rc || ', ORA-' || oer ||' XA_ROLLBACK does not return XA_OK');
raise_application_error(-20001, 'ORA-' || oer ||' error in rolling back a failed transaction');
END IF;
raise_application_error(-20002, 'ORA-' || oer ||' error in transaction processing, transaction rolled back');
END;
/
-- Session 2 commits the transaction
DECLARE
rc PLS_INTEGER;
oer PLS_INTEGER;
xae EXCEPTION;
BEGIN
rc := dbms_xa.xa_commit(dbms_xa_xid(123), TRUE);
IF rc != dbms_xa.xa_ok THEN
oer := dbms_xa.xa_getlastoer();
dbms_output.put_line('ORA-' || oer || ' occurred, XA_COMMIT failed');
RAISE xae;
ELSE
dbms_output.put_line('XA_COMMIT(commit xid=123) OK');
END IF;
EXCEPTION
WHEN xae THEN
dbms_output.put_line('XA error('||rc||') occurred, rolling back the transaction ...');
rc := dbms_xa.xa_rollback(dbms_xa_xid(123));
IF rc != dbms_xa.xa_ok THEN
oer := dbms_xa.xa_getlastoer();
dbms_output.put_line('XA-' || rc ||', ORA-' || oer ||' XA_ROLLBACK does not return XA_OK');
raise_application_error(-20001, 'ORA-' || oer ||' error in rolling back a failed transaction');
END IF;
raise_application_error(-20002, 'ORA-' || oer ||' error in transaction processing, transaction rolled back');
END;
/ |