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Store attachment count for better performance

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M66B
2019-07-24 14:49:55 +02:00
parent 752aee0a3b
commit 3be40ef641
6 changed files with 1860 additions and 9 deletions
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25
app/src/main/java/eu/faircode/email/DB.java
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@@ -57,7 +57,7 @@ import io.requery.android.database.sqlite.RequerySQLiteOpenHelperFactory;
// https://developer.android.com/topic/libraries/architecture/room.html
@Database(
version = 95,
version = 96,
entities = {
EntityIdentity.class,
EntityAccount.class,
@@ -161,7 +161,19 @@ public abstract class DB extends RoomDatabase {
.databaseBuilder(context, DB.class, DB_NAME)
.openHelperFactory(new RequerySQLiteOpenHelperFactory())
.setQueryExecutor(executor)
.setJournalMode(JournalMode.WRITE_AHEAD_LOGGING);
.setJournalMode(JournalMode.WRITE_AHEAD_LOGGING)
.addCallback(new Callback() {
@Override
public void onOpen(@NonNull SupportSQLiteDatabase db) {
Log.i("Creating triggers");
db.execSQL("CREATE TRIGGER IF NOT EXISTS attachment_insert" +
" AFTER INSERT ON attachment" +
" BEGIN UPDATE message SET attachments = attachments + 1 WHERE message.id = NEW.message; END");
db.execSQL("CREATE TRIGGER IF NOT EXISTS attachment_delete" +
" AFTER DELETE ON attachment" +
" BEGIN UPDATE message SET attachments = attachments - 1 WHERE message.id = OLD.message; END");
}
});
}
private static DB migrate(final Context context, RoomDatabase.Builder<DB> builder) {
@@ -956,6 +968,15 @@ public abstract class DB extends RoomDatabase {
db.execSQL("ALTER TABLE `identity` ADD COLUMN `sign_key` INTEGER");
}
})
.addMigrations(new Migration(95, 96) {
@Override
public void migrate(@NonNull SupportSQLiteDatabase db) {
Log.i("DB migration from version " + startVersion + " to " + endVersion);
db.execSQL("ALTER TABLE `message` ADD COLUMN `attachments` INTEGER NOT NULL DEFAULT 0");
db.execSQL("UPDATE message SET attachments =" +
" (SELECT COUNT(attachment.id) FROM attachment WHERE attachment.message = message.id)");
}
})
.build();
}