Sorry for the very newbie question, but what is the syntax used to
lock tables for a series of actions, for example in MySql the
following applies:
LOCK TABLE nested_category WRITE;
SELECT @myRight := rgt FROM nested_category
WHERE name = 'TELEVISIONS';
UPDATE nested_category SET rgt = rgt + 2 WHERE rgt > @myRight;
UPDATE nested_category SET lft = lft + 2 WHERE lft > @myRight;
INSERT INTO nested_category(name, lft, rgt) VALUES('GAME CONSOLES',
@myRight + 1, @myRight + 2);
UNLOCK TABLES;
I believe this is handled by transactions in H2, but I cannot find the
syntax for BEGIN TRANSACTION in the documentation.
The following works:
BEGIN TRANSACTION;
SELECT @myRight := rgt FROM nested_category
WHERE name = 'TELEVISIONS';
UPDATE nested_category SET rgt = rgt + 2 WHERE rgt > @myRight;
UPDATE nested_category SET lft = lft + 2 WHERE lft > @myRight;
INSERT INTO nested_category(name, lft, rgt) VALUES('GAME CONSOLES',
@myRight + 1, @myRight + 2);
COMMIT;
but I am not sure if it is correct or not?
Thanks!
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