Some additional indices were added to database for faster access to 'ledger' table (new DB schema isn't activated yet).

Author: titov-vv

jal/db/operations.py

@@ -704,7 +704,7 @@ def __init__(self, operation_data=None, opart=None):
         else:
             self._icon = JalIcon[JalIcon.BUY]
             self._oname = self.tr("Buy")
-        if self._opart is not None and self._opart == self.PART_PROFIT:  # FIXME this query slows down UI a lot - make db index? or change
+        if self._opart is not None and self._opart == self.PART_PROFIT:
             profit = self._read("SELECT amount FROM ledger WHERE otype=:otype AND oid=:oid AND opart=:opart AND book_account=:book",
                                 [(":otype", self._otype), (":oid", self._oid), (":opart", self._opart), (":book", BookAccount.Incomes)])
             try:

jal/jal_init.sql

@@ -182,6 +182,10 @@ CREATE TABLE ledger (
     category_id  INTEGER REFERENCES categories (id) ON DELETE NO ACTION ON UPDATE NO ACTION, -- category that is related with transaction. No FK enforcement as table is cleaned by categories_after_delete trigger
     tag_id       INTEGER REFERENCES tags (id) ON DELETE NO ACTION ON UPDATE NO ACTION        -- tag that is related with transaction. No FK enforcement as table is cleaned by tags_after_delete trigger
 );
+DROP INDEX IF EXISTS ledger_by_operation;
+CREATE INDEX ledger_by_operation ON ledger (otype, oid, opart, book_account);
+DROP INDEX IF EXISTS ledger_by_time;
+CREATE INDEX ledger_by_time ON ledger (timestamp, asset_id, account_id);
 
 -- Table: ledger_totals to keep last accumulated amount value for each transaction
 DROP TABLE IF EXISTS ledger_totals;

jal/updates/jal_delta_58.sql

@@ -0,0 +1,12 @@
+BEGIN TRANSACTION;
+--------------------------------------------------------------------------------
+PRAGMA foreign_keys = OFF;
+--------------------------------------------------------------------------------
+DROP INDEX IF EXISTS ledger_by_operation;
+CREATE INDEX ledger_by_operation ON ledger (otype, oid, opart, book_account);
+DROP INDEX IF EXISTS ledger_by_time;
+CREATE INDEX ledger_by_time ON ledger (timestamp, asset_id, account_id);
+--------------------------------------------------------------------------------
+-- Set new DB schema version
+UPDATE settings SET value=58 WHERE name='SchemaVersion';
+COMMIT;