-----Original Message-----
From: [email protected]
[mailto:[email protected]] On Behalf Of Tito Ciuro
Sent: Wednesday, February 25, 2009 6:36 PM
To: [email protected]
Subject: [sqlite] Transactions and attached databases
Hello,
If I attach one or more databases and wrap a series of operations which
affect some/all of them, would ROLLBACK or COMMIT treat these operations
atomically? For example:
Open database 'foo';
Attach database 'bar' as a1;
BEGIN TRANSACTION;
INSERT INTO main.some_table ... ;
DELETE FROM main.some_table WHERE ... ;
INSERT INTO a1.another_table ... ; COMMIT/ROLLBACK TRANSACTION;
Would the insertions and deletions be either committed or rolled back
atomically? Is this supported?
Thanks,
-- Tito
===================
===================
Greetings, Tito,
Did you see page:
http://www.sqlite.org/lang_attach.html
Transactions involving multiple attached databases are atomic, assuming
that the main database is not ":memory:".
It then goes on to say:
If the main database is ":memory:" then transactions continue to be
atomic within each individual database file. But if the host computer
crashes in the middle of a COMMIT where two or more database files are
updated, some of those files might get the changes where others might
not.
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