Neoview SQL Reference Manual (R2.4 SP2)

Effect on Utilities
The SET TRANSACTION statement has no effect on the utility statements. The SET
TRANSACTION statement does set attributes for transactions for UPDATE STATISTICS.
Examples of SET TRANSACTION
• Set the isolation level of a transaction that performs deletes, inserts, and updates:
SET TRANSACTION
ISOLATION LEVEL SERIALIZABLE;
--- SQL operation complete.
BEGIN WORK;
--- SQL operation complete.
DELETE FROM persnl.employee
WHERE empnum = 23;
--- 1 row(s) deleted.
INSERT INTO persnl.employee
(empnum, first_name, last_name, deptnum, salary)
VALUES (50, 'JERRY','HOWARD', 1000, 137000.00);
--- 1 row(s) inserted.
UPDATE persnl.dept
SET manager = 50
WHERE deptnum = 1000;
--- 1 row(s) updated.
COMMIT WORK;
--- SQL operation complete.
This transaction uses SERIALIZABLE access (which provides maximum consistency but
reduces concurrency). Therefore, you should execute it at a time when few users need
concurrent access to the database. Locks acquired for SERIALIZABLE access are held until
the changes made by transaction is committed.
• Using MULTI COMMIT with other transaction-mode options:
SET TRANSACTION ISOLATION READ COMMITTED,
MULTI COMMIT ON,
READ WRITE;
SET TRANSACTION Statement 191