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Ah, so a view that aggregates all transactions. Not a bad idea, but, there could be many, many transactions...millions. I am storing both user-level transactions AND site-level transactions (I'm using Mongo, so hence the optional-ness of transactions.userId). So, in a site-level transaction, I need to log the current site balance, and since transactions will happen frequently (let's say 10 per second), I would think an aggregation query would have a negative impact on performance.

Chad Johnson
– Chad Johnson

2014-11-05 18:59:29 +00:00
Commented Nov 5, 2014 at 18:59
Ah. That wasn't clear from your question. I'll update my answer...

FrustratedWithFormsDesigner
– FrustratedWithFormsDesigner

2014-11-05 20:54:35 +00:00
Commented Nov 5, 2014 at 20:54
1

Depending on the stats you need, you might be able to remove the need for aggregate queries (either updating after each transaction, periodic queries, views, etc) by using a running tally system. As a transaction is added, add that value to the your total as well.

GrandmasterB
– GrandmasterB

2014-11-05 22:52:08 +00:00
Commented Nov 5, 2014 at 22:52
@GrandmasterB Wouldn't the tally system be the same as what I would be doing with the stats table (keeping a summary and using that to log the balance in each new transaction)? If not, how does a tally system differ?

Chad Johnson
– Chad Johnson

2014-11-06 00:04:09 +00:00
Commented Nov 6, 2014 at 0:04

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