Merge lp:~intellectronica/launchpad/update-max-heat into lp:launchpad/db-devel

[Eleanor Berger]

[Eleanor Berger (intellectronica)]

This branch adds a trigger which updates the max_bug_heat column on bug targets.

[Stuart Bishop (stub)]

When BugTasks are created or retargetted, the maximums need to be recalculated too (both for the old target and the new target). I don't think we delete BugTasks so we don't need to cope with that case.

The Distribution.max_bug_heat needs to include bugs linked to a distroseries (Only one of BugTask.distroseries and BugTask.distribution can be set).

review: Needs Fixing (db)

[Stuart Bishop (stub)]

Similarly, only one of product and productseries is ever set.

[Eleanor Berger (intellectronica)]

Getting rid of this for now. After taking into consideration all those additional rules, a trigger doesn't really make much sense.

=== added file 'database/schema/patch-2207-99-0.sql'
--- database/schema/patch-2207-99-0.sql	1970-01-01 00:00:00 +0000
+++ database/schema/patch-2207-99-0.sql	2010-02-26 13:30:40 +0000
@@ -0,0 +1,17 @@
+-- Copyright 2010 Canonical Ltd.  This software is licensed under the
+-- GNU Affero General Public License version 3 (see the file LICENSE).
+
+SET client_min_messages=ERROR;
+
+-- product, project, distribution, distributionsourcepackage
+
+CREATE TRIGGER bug_max_heat_on_update_t
+AFTER UPDATE ON bug
+FOR EACH ROW EXECUTE PROCEDURE bug_update_max_heat_on_update();
+
+CREATE TRIGGER bugtask_max_heat_on_insert_update_t
+AFTER INSERT OR UPDATE ON bugtask
+FOR EACH ROW EXECUTE PROCEDURE bugtask_update_max_heat_on_insert_update();
+
+
+INSERT INTO LaunchpadDatabaseRevision VALUES (2207, 99, 0);

=== modified file 'database/schema/trusted.sql'
--- database/schema/trusted.sql	2010-02-05 12:17:56 +0000
+++ database/schema/trusted.sql	2010-02-26 13:30:40 +0000
@@ -1480,3 +1480,125 @@
         RETURN NULL; -- Ignored - this is an AFTER trigger
     END;
     $$;
+
+CREATE OR REPLACE FUNCTION bug_update_max_heat_on_update() RETURNS trigger
+    SECURITY DEFINER LANGUAGE plpgsql AS
+    $$
+    BEGIN
+        IF OLD.heat != NEW.heat THEN
+            UPDATE product
+            SET max_bug_heat =
+                (SELECT MAX(bug.heat)
+                 FROM bugtask, bug
+                 WHERE bugtask.bug = bug.id AND
+                       bug.id = NEW.id AND
+                       bugtask.product = product.id)
+            FROM bugtask
+            WHERE bugtask.product = product.id;
+
+            UPDATE project
+            SET max_bug_heat =
+                (SELECT MAX(bug.heat)
+                 FROM bugtask, bug
+                 WHERE bugtask.bug = bug.id AND
+                       bug.id = NEW.id AND
+                       bugtask.product = product.id AND
+                       product.project = project.id)
+            FROM bugtask, product
+            WHERE bugtask.product = product.id AND
+                  product.project = project.id;
+
+            UPDATE distribution
+            SET max_bug_heat =
+                (SELECT MAX(bug.heat)
+                 FROM bugtask, bug
+                 WHERE bugtask.bug = bug.id AND
+                       bug.id = NEW.id AND
+                       bugtask.distribution = distribution.id)
+            FROM bugtask
+            WHERE bugtask.distribution = distribution.id;
+
+            UPDATE distributionsourcepackage
+            SET max_bug_heat =
+                (SELECT MAX(bug.heat)
+                 FROM bugtask, bug
+                 WHERE bugtask.bug = bug.id AND
+                       bug.id = NEW.id AND
+                       bugtask.sourcepackagename = distributionsourcepackage.id)
+            FROM bugtask
+            WHERE bugtask.sourcepackagename = distributionsourcepackage.id;
+
+        END IF;
+        RETURN NULL;
+    END;
+    $$;
+
+CREATE OR REPLACE FUNCTION bugtask_update_max_heat_on_insert_update() RETURNS trigger
+    SECURITY DEFINER LANGUAGE plpgsql AS
+    $$
+    BEGIN
+        IF OLD.product != NEW.product THEN
+            UPDATE product
+            SET max_bug_heat =
+                (SELECT MAX(bug.heat)
+                 FROM bugtask, bug
+                 WHERE bugtask.bug = bug.id AND
+                       bugtask.product = product.id)
+            FROM bugtask
+            WHERE bugtask.product = NEW.product;
+
+            UPDATE product
+            SET max_bug_heat =
+                (SELECT MAX(bug.heat)
+                 FROM bugtask, bug
+                 WHERE bugtask.bug = bug.id AND
+                       bugtask.product = product.id)
+            FROM bugtask
+            WHERE bugtask.product = OLD.product;
+
+            UPDATE project
+            SET max_bug_heat =
+                (SELECT MAX(bug.heat)
+                 FROM bugtask, bug
+                 WHERE bugtask.bug = bug.id AND
+                       bugtask.product = product.id AND
+                       product.project = project.id)
+            FROM bugtask, product
+            WHERE bugtask.product = NEW.product AND
+                  product.project = project.id;
+
+            UPDATE project
+            SET max_bug_heat =
+                (SELECT MAX(bug.heat)
+                 FROM bugtask, bug
+                 WHERE bugtask.bug = bug.id AND
+                       bugtask.product = product.id AND
+                       product.project = project.id)
+            FROM bugtask, product
+            WHERE bugtask.product = OLD.product AND
+                  product.project = project.id;
+
+        ELSIF OLD.sourcepackagename != NEW.sourcepackagename THEN
+
+            UPDATE distributionsourcepackage
+            SET max_bug_heat =
+                (SELECT MAX(bug.heat)
+                 FROM bugtask, bug
+                 WHERE bugtask.bug = bug.id AND
+                       bugtask.sourcepackagename = distributionsourcepackage.id)
+            FROM bugtask
+            WHERE bugtask.sourcepackagename = NEW.sourcepackagename;
+
+            UPDATE distributionsourcepackage
+            SET max_bug_heat =
+                (SELECT MAX(bug.heat)
+                 FROM bugtask, bug
+                 WHERE bugtask.bug = bug.id AND
+                       bugtask.sourcepackagename = distributionsourcepackage.id)
+            FROM bugtask
+            WHERE bugtask.sourcepackagename = OLD.sourcepackagename;
+
+        END IF;
+        RETURN NULL;
+    END;
+    $$;