From 07146e3261e0edbfa4ebae2bc8b3da08781a8a4e Mon Sep 17 00:00:00 2001
From: Julien BLACHE <jb@jblache.org>
Date: Sat, 6 Mar 2010 19:10:49 +0100
Subject: [PATCH] Handle database upgrade v7 -> v8

---
 src/db.c | 40 ++++++++++++++++++++++++++++++++++++++++
 1 file changed, 40 insertions(+)

diff --git a/src/db.c b/src/db.c
index c3c739d5..2fc28b11 100644
--- a/src/db.c
+++ b/src/db.c
@@ -3526,6 +3526,39 @@ static struct db_init_query db_upgrade_v7_queries[] =
     { U_V7_SCVER,     "set schema_version to 7" },
   };
 
+/* Upgrade from schema v7 to v8 */
+#define U_V8_GROUPS							\
+  "CREATE TABLE IF NOT EXISTS groups ("					\
+  "   id             INTEGER PRIMARY KEY NOT NULL,"			\
+  "   type           INTEGER NOT NULL,"					\
+  "   name           VARCHAR(1024) NOT NULL,"				\
+  "   persistentid   INTEGER NOT NULL,"					\
+  "CONSTRAINT groups_type_unique_persistentid UNIQUE (type, persistentid)" \
+  ");"
+
+#define U_V8_TRG1							\
+  "CREATE TRIGGER update_groups_new_file AFTER INSERT ON files FOR EACH ROW" \
+  " BEGIN"								\
+  "   INSERT OR IGNORE INTO groups (type, name, persistentid) VALUES (1, NEW.album, NEW.songalbumid);" \
+  " END;"
+
+#define U_V8_TRG2							\
+  "CREATE TRIGGER update_groups_update_file AFTER UPDATE OF songalbumid ON files FOR EACH ROW" \
+  " BEGIN"								\
+  "   INSERT OR IGNORE INTO groups (type, name, persistentid) VALUES (1, NEW.album, NEW.songalbumid);" \
+  " END;"
+
+#define U_V8_SCVER						\
+  "UPDATE admin SET value = '8' WHERE key = 'schema_version';"
+
+static struct db_init_query db_upgrade_v8_queries[] =
+  {
+    { U_V8_GROUPS,    "create groups table" },
+    { U_V8_TRG1,      "create trigger update_groups_new_file" },
+    { U_V8_TRG2,      "create trigger update_groups_update_file" },
+    { U_V8_SCVER,     "set schema_version to 8" },
+  };
+
 static int
 db_check_version(void)
 {
@@ -3604,6 +3637,13 @@ db_check_version(void)
 	    if (ret < 0)
 	      return -1;
 
+	    /* FALLTHROUGH */
+
+	  case 7:
+	    ret = db_generic_upgrade(db_upgrade_v8_queries, sizeof(db_upgrade_v8_queries) / sizeof(db_upgrade_v8_queries[0]));
+	    if (ret < 0)
+	      return -1;
+
 	    break;
 
 	  default: