Hey thanks.. I thought I'd share the method I came up with for updating
subscriptions. Basically, as far as my code is concerned the DB uses a
bitmask (at least for updates) but I abstract it through a function. First
off, I have a little helper function so I don't repeat the same code a bunch
2010/4/30 Mike Christensen m...@kitchenpc.com:
Ok I've been blatantly lying, err, purposely simplifying the problem for the
sake of the original email :)
I've read over the responses, and am actually now considering just not using
any index at all. Here's why:
First, this actually isn't
I want a column in my Users table that will keep track of which types of
notifications the user wants to subscribe to. There's probably about 10
different types, so I don't want to have 10 boolean columns because this
seems kinda hacky and makes adding new types more work. So I'm thinking
about
Mike Christensen m...@kitchenpc.com writes:
When a certain event happens, let's say event 4, I need to query for which
users to notify. So I'll be doing something like:
SELECT UserId FROM Users WHERE Subscriptions 8;
My question is say there's a million rows in the Users table. If I have
On Fri, Apr 30, 2010 at 10:08 AM, Tom Lane t...@sss.pgh.pa.us wrote:
Mike Christensen m...@kitchenpc.com writes:
When a certain event happens, let's say event 4, I need to query for which
users to notify. So I'll be doing something like:
SELECT UserId FROM Users WHERE Subscriptions 8;
My
Peter Hunsberger peter.hunsber...@gmail.com writes:
If all subscriptions are roughly equal in popularity then any single
select should give ~ 10% of the data. That would seem to be selective
enough that you'd really want an index?
My personal rule of thumb is that 10% is around the threshold
On Fri, Apr 30, 2010 at 11:29 AM, Tom Lane t...@sss.pgh.pa.us wrote:
Peter Hunsberger peter.hunsber...@gmail.com writes:
If all subscriptions are roughly equal in popularity then any single
select should give ~ 10% of the data. That would seem to be selective
enough that you'd really want an
Ok I've been blatantly lying, err, purposely simplifying the problem for the
sake of the original email :)
I've read over the responses, and am actually now considering just not using
any index at all. Here's why:
First, this actually isn't the only thing on the WHERE clause. It will only
