Chris Velevitch wrote:
If I insert a record into a table with a serial primary key, does
select currval fetch it from the database or does it get it from
within memory?
If it fetches it from the database, should I use a Serializable
transaction or just a read committed transaction?
You can control the level of caching, but you'll have to be pushing it
for the serial to be a large part of your overheads. Each sequence is a
small table - you can do "SELECT * FROM my_seq" and see the "insides".
You don't need to worry about transaction isolation for sequences, you
are always guaranteed a new value. The price you pay for this is that
there might be gaps in the series of values you get.
--
Richard Huxton
Archonet Ltd
---------------------------(end of broadcast)---------------------------
TIP 1: if posting/reading through Usenet, please send an appropriate
subscribe-nomail command to [EMAIL PROTECTED] so that your
message can get through to the mailing list cleanly
