Specifications General Ledger

multiple currencies

There is a base currency for each ledger, the balances of the ledger are stored in the base currency
There is an international currency
- it is only used for reporting (previously it was stored with each balance, but that caused too much problems/overhead)
There can be foreign currency accounts which have balances in their own currency
exchange rate is stored in the database
- corporate exchange rate (eg. issued once per month, an average exchange rate over the last 30 days)
- daily exchange rate: this can be updated each day, or downloaded from Yahoo Finance etc.

each transaction has an opposite transaction
- this was more complicated in the old Petra 2.x, with summarised transactions to save number of transactions in the database
only one reference/narrative for a pair of transactions
improved reports will show the opposite transaction, on Account Detail report etc.
posting: should show a preview of how the account balances would be after posting???
to test: should there be 3 different tables, for transactions from the current periods, the closed periods of the current year, and periods of previous years? is Postgresql fast enough to cope with all transactions in one table?