[migration] Order builds by started time, not id

alembic/versions/0300b36eeaf4_order_builds_by_started_time_not_id.py

@@ -0,0 +1,138 @@
+"""
+Order builds by started time, not id
+
+Create Date: 2017-09-05 17:24:00.788447
+
+"""
+
+# revision identifiers, used by Alembic.
+revision = '0300b36eeaf4'
+down_revision = '94f1b9dde3e1'
+
+from alembic import op
+
+
+def upgrade():
+    op.execute("""
+        DROP INDEX ix_build_composite;
+        CREATE INDEX ix_build_composite ON build(package_id, started DESC);
+
+        -- trigger functions
+        CREATE OR REPLACE FUNCTION update_last_complete_build()
+            RETURNS TRIGGER AS $$
+        BEGIN
+            UPDATE build
+            SET last_complete = FALSE
+            WHERE last_complete AND package_id = NEW.package_id;
+            WITH lcb AS (
+                UPDATE build
+                SET last_complete = TRUE
+                WHERE id = (SELECT id
+                            FROM build
+                            WHERE package_id = NEW.package_id
+                                  AND (state = 3 OR state = 5)
+                            ORDER BY started DESC
+                            LIMIT 1)
+                RETURNING id, state)
+            UPDATE package
+            SET last_complete_build_id = lcb.id,
+                last_complete_build_state = lcb.state
+            FROM lcb
+            WHERE package.id = NEW.package_id
+                AND last_complete_build_id IS DISTINCT FROM lcb.id;
+            RETURN NEW;
+        END $$ LANGUAGE plpgsql;
+
+        CREATE OR REPLACE FUNCTION update_last_build()
+            RETURNS TRIGGER AS $$
+        BEGIN
+            UPDATE package
+            SET last_build_id = lb.id
+            FROM (SELECT id, state, started
+                  FROM build
+                  WHERE package_id = NEW.package_id
+                  ORDER BY started DESC
+                  LIMIT 1) AS lb
+            WHERE package.id = NEW.package_id
+                AND last_build_id IS DISTINCT FROM lb.id;
+            RETURN NEW;
+        END $$ LANGUAGE plpgsql;
+
+        CREATE OR REPLACE FUNCTION update_last_build_del()
+            RETURNS TRIGGER AS $$
+        BEGIN
+            UPDATE package
+            SET last_build_id = lb.id
+            FROM (SELECT id, state, started
+                  FROM build
+                  WHERE package_id = OLD.package_id
+                        AND build.id != OLD.id
+                  ORDER BY started DESC
+                  LIMIT 1) AS lb
+            WHERE package.id = OLD.package_id
+                AND last_build_id IS DISTINCT FROM lb.id;
+            RETURN OLD;
+        END $$ LANGUAGE plpgsql;
+    """)
+
+
+def downgrade():
+    op.execute("""
+        DROP INDEX ix_build_composite;
+        CREATE INDEX ix_build_composite ON build(package_id, id DESC);
+
+        -- trigger functions
+        CREATE OR REPLACE FUNCTION update_last_complete_build()
+            RETURNS TRIGGER AS $$
+        BEGIN
+            UPDATE build
+            SET last_complete = FALSE
+            WHERE last_complete AND package_id = NEW.package_id;
+            WITH lcb AS (
+                UPDATE build
+                SET last_complete = TRUE
+                WHERE id = (SELECT MAX(id)
+                            FROM build
+                            WHERE package_id = NEW.package_id
+                                  AND (state = 3 OR state = 5))
+                RETURNING id, state)
+            UPDATE package
+            SET last_complete_build_id = lcb.id,
+                last_complete_build_state = lcb.state
+            FROM lcb
+            WHERE package.id = NEW.package_id
+                AND last_complete_build_id IS DISTINCT FROM lcb.id;
+            RETURN NEW;
+        END $$ LANGUAGE plpgsql;
+
+        CREATE OR REPLACE FUNCTION update_last_build()
+            RETURNS TRIGGER AS $$
+        BEGIN
+            UPDATE package
+            SET last_build_id = lb.id
+            FROM (SELECT id, state, started
+                  FROM build
+                  WHERE package_id = NEW.package_id
+                  ORDER BY id DESC
+                  LIMIT 1) AS lb
+            WHERE package.id = NEW.package_id
+                AND last_build_id IS DISTINCT FROM lb.id;
+            RETURN NEW;
+        END $$ LANGUAGE plpgsql;
+
+        CREATE OR REPLACE FUNCTION update_last_build_del()
+            RETURNS TRIGGER AS $$
+        BEGIN
+            UPDATE package
+            SET last_build_id = lb.id
+            FROM (SELECT id, state, started
+                  FROM build
+                  WHERE package_id = OLD.package_id
+                        AND build.id != OLD.id
+                  ORDER BY id DESC
+                  LIMIT 1) AS lb
+            WHERE package.id = OLD.package_id
+                AND last_build_id IS DISTINCT FROM lb.id;
+            RETURN OLD;
+        END $$ LANGUAGE plpgsql;
+    """)