Improve update.py database performance.

This patch adds indexes to awfy_breakdown and awfy_score and rewrites
the update search queries to be simpler and much faster.

database/schema.sql

@@ -167,8 +167,8 @@ CREATE TABLE `awfy_breakdown` (
   `test_id` int(10) DEFAULT NULL,
   PRIMARY KEY (`id`),
   KEY `run_id` (`run_id`),
-  KEY `suite_id` (`suite_id`),
   KEY `mode_id` (`mode_id`),
+  KEY `test_id` (`test_id`),
 ) ENGINE=MyISAM  DEFAULT CHARSET=latin1 AUTO_INCREMENT=1 ;
 
 -- --------------------------------------------------------
@@ -218,6 +218,7 @@ CREATE TABLE `awfy_score` (
   PRIMARY KEY (`id`),
   KEY `run_id` (`run_id`),
   KEY `mode_id` (`mode_id`)
+  KEY `suite_id` (`suite_id`)
 ) ENGINE=MyISAM  DEFAULT CHARSET=latin1 AUTO_INCREMENT=1 ;
 
 -- --------------------------------------------------------

server/db_upgrade.py

@@ -68,3 +68,16 @@ if 'test' in awfy_breakdown_columns:
 if 'suite_id' in awfy_breakdown_columns:
     print('Dropping old column suite_id...')
     c.execute("alter table `awfy_breakdown` drop `suite_id`")
+
+def try_add_column(table, column):
+    try:
+        c.execute("alter table `{0}` add index {1} ({2})".format(table, column, column))
+    except:
+        pass
+
+try_add_column('awfy_breakdown', 'run_id')
+try_add_column('awfy_breakdown', 'mode_id')
+try_add_column('awfy_breakdown', 'test_id')
+try_add_column('awfy_score', 'run_id')
+try_add_column('awfy_score', 'mode_id')
+try_add_column('awfy_score', 'suite_id')

server/update.py

@@ -65,9 +65,9 @@ def fetch_test_scores(machine_id, suite_id, name, earliest_run_id):
 def fetch_suite_scores(machine_id, suite_id, earliest_run_id):
     query = "SELECT r.id, r.stamp, b.cset, s.score, s.mode_id               \
              FROM awfy_score s                                              \
-             JOIN awfy_mode m                                               \
+             JOIN awfy_mode m on m.id = s.mode_id                           \
              JOIN fast_run r ON s.run_id = r.id                             \
-             JOIN awfy_build b ON (s.run_id = b.run_id AND s.mode_id = b.mode_id)    \
+             JOIN awfy_build b ON s.run_id = b.run_id                       \
              WHERE s.suite_id = %s                                          \
              AND r.id > %s                                                  \
              AND r.status = 1                                               \