- transdate => { type => 'date' },
- buy => { type => 'numeric', precision => 5, scale => 15 },
- sell => { type => 'numeric', precision => 5, scale => 15 },
+ buy => { type => 'numeric', precision => 15, scale => 5 },
+ currency_id => { type => 'integer', not_null => 1 },
+ id => { type => 'serial', not_null => 1 },