From aca889fcc88b076ee03d01d33fb7ebc59ba1bfed Mon Sep 17 00:00:00 2001
From: Jeremy Kerr <jk@ozlabs.org>
Date: Sun, 8 Feb 2009 13:28:22 +1100
Subject: [sql] Perserve bundle ordering in bundle reorder migration script

Signed-off-by: Jeremy Kerr <jk@ozlabs.org>
---
 lib/sql/migration/005-bundle-patch-ordering.sql | 32 +++++++++++++++++++------
 1 file changed, 25 insertions(+), 7 deletions(-)

(limited to 'lib/sql/migration/005-bundle-patch-ordering.sql')

diff --git a/lib/sql/migration/005-bundle-patch-ordering.sql b/lib/sql/migration/005-bundle-patch-ordering.sql
index 1491aa8..238e37b 100644
--- a/lib/sql/migration/005-bundle-patch-ordering.sql
+++ b/lib/sql/migration/005-bundle-patch-ordering.sql
@@ -1,14 +1,32 @@
 BEGIN;
-ALTER TABLE patchwork_bundle_patches RENAME TO patchwork_bundlepatch;
-CREATE SEQUENCE bundlepatch_tmp_seq;
+CREATE TABLE "patchwork_bundlepatch" (                                          
+    "id" SERIAL NOT NULL PRIMARY KEY,
+    "patch_id" INTEGER NOT NULL
+        REFERENCES "patchwork_patch" ("id") DEFERRABLE INITIALLY DEFERRED,
+    "bundle_id" INTEGER NOT NULL
+        REFERENCES "patchwork_bundle" ("id") DEFERRABLE INITIALLY DEFERRED,
+    "order" SERIAL NOT NULL,
+    UNIQUE ("bundle_id", "patch_id")
+);
 
+-- we 'INSERT INTO ... SELECT' (rather than renaming and adding the order
+-- column) here so that we can order by date
+INSERT INTO patchwork_bundlepatch (id, patch_id, bundle_id)
+    SELECT patchwork_bundle_patches.id, patch_id, bundle_id
+        FROM patchwork_bundle_patches
+        INNER JOIN patchwork_patch
+            ON patchwork_patch.id = patchwork_bundle_patches.patch_id
+        ORDER BY bundle_id, patchwork_patch.date;
+COMMIT;
+
+BEGIN;
 ALTER TABLE patchwork_bundlepatch
-	ADD COLUMN "order" INTEGER NOT NULL
-		DEFAULT nextval('bundlepatch_tmp_seq');
-ALTER TABLE patchwork_bundlepatch ALTER COLUMN "order" DROP DEFAULT;
-DROP SEQUENCE bundlepatch_tmp_seq;
-ALTER TABLE patchwork_bundlepatch ADD UNIQUE("bundle_id", "order");
+    ALTER COLUMN "order" TYPE INTEGER;
+
+-- normalise ordering: order should start with 1 in each bundle
 UPDATE patchwork_bundlepatch SET "order" = 1 + "order" -
 	(SELECT min("order") FROM patchwork_bundlepatch AS p2
 		WHERE p2.bundle_id = patchwork_bundlepatch.bundle_id);
+
+SELECT * FROM patchwork_bundlepatch;
 COMMIT;
-- 
cgit v1.2.3

