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Destructive database restructuring

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M66B
2018-11-13 10:05:33 +01:00
parent e0d8c6180d
commit 0d323a53f2
34 changed files with 311 additions and 25784 deletions
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31
app/src/main/java/eu/faircode/email/DB.java
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@@ -46,7 +46,7 @@ import io.requery.android.database.sqlite.RequerySQLiteOpenHelperFactory;
// https://developer.android.com/topic/libraries/architecture/room.html
@Database(
version = 28,
version = 1,
entities = {
EntityIdentity.class,
EntityAccount.class,
@@ -79,7 +79,7 @@ public abstract class DB extends RoomDatabase {
private static DB sInstance;
private static final String DB_NAME = "email";
private static final String DB_NAME = "fairemail";
public static synchronized DB getInstance(Context context) {
if (sInstance == null) {
@@ -111,6 +111,7 @@ public abstract class DB extends RoomDatabase {
}
private static DB migrate(RoomDatabase.Builder<DB> builder) {
// https://www.sqlite.org/lang_altertable.html
return builder
.addCallback(new Callback() {
@Override
@@ -320,9 +321,10 @@ public abstract class DB extends RoomDatabase {
public void migrate(SupportSQLiteDatabase db) {
Log.i(Helper.TAG, "DB migration from version " + startVersion + " to " + endVersion);
db.execSQL("ALTER TABLE `message` RENAME TO `message_old`;");
// https://www.sqlite.org/lang_altertable.html
db.execSQL("PRAGMA foreign_keys=OFF;");
db.execSQL("CREATE TABLE `message`" +
db.execSQL("CREATE TABLE `message_new`" +
" (`id` INTEGER PRIMARY KEY AUTOINCREMENT," +
" `account` INTEGER NOT NULL," +
" `folder` INTEGER NOT NULL," +
@@ -363,20 +365,10 @@ public abstract class DB extends RoomDatabase {
" FOREIGN KEY(`replying`) REFERENCES `message`(`id`) ON UPDATE NO ACTION ON DELETE SET NULL" +
" )");
db.execSQL("INSERT INTO `message` SELECT * FROM `message_old`;");
db.execSQL("DROP INDEX `index_message_account`");
db.execSQL("DROP INDEX `index_message_folder`");
db.execSQL("DROP INDEX `index_message_identity`");
db.execSQL("DROP INDEX `index_message_replying`");
db.execSQL("DROP INDEX `index_message_folder_uid_ui_found`");
db.execSQL("DROP INDEX `index_message_msgid_folder_ui_found`");
db.execSQL("DROP INDEX `index_message_thread`");
db.execSQL("DROP INDEX `index_message_received`");
db.execSQL("DROP INDEX `index_message_ui_seen`");
db.execSQL("DROP INDEX `index_message_ui_hide`");
db.execSQL("DROP INDEX `index_message_ui_found`");
db.execSQL("DROP INDEX `index_message_ui_ignored`");
db.execSQL("DELETE from `message` WHERE account IS NULL;");
db.execSQL("INSERT INTO `message_new` SELECT * FROM `message`;");
db.execSQL("DROP TABLE `message`;");
db.execSQL("ALTER TABLE `message_new` RENAME TO `message`");
db.execSQL("CREATE INDEX `index_message_account` ON `message` (`account`)");
db.execSQL("CREATE INDEX `index_message_folder` ON `message` (`folder`)");
@@ -391,7 +383,8 @@ public abstract class DB extends RoomDatabase {
db.execSQL("CREATE INDEX `index_message_ui_found` ON `message` (`ui_found`)");
db.execSQL("CREATE INDEX `index_message_ui_ignored` ON `message` (`ui_ignored`)");
db.execSQL("DROP TABLE `message_old`;");
db.execSQL("PRAGMA foreign_key_check;");
db.execSQL("PRAGMA foreign_keys=ON;");
}
})
.build();