小编sav*_*hra的帖子

在我的旧sqlite表中,我有这些列(id INTEGER PRIMARY KEY AUTOINCREMENT,api_response_json TEXT,api_req TEXT,post_params TEXT,req_type VARCHAR,timestamp TIMESTAMP)

现在我正在尝试将它迁移到Room DB,如下所示: -

static final Migration MIGRATION_1_2 = new migration(1,2){

    @Override
    public void migrate(SupportSQLiteDatabase database) {
    // Create the new table
        database.execSQL(
                "CREATE TABLE users_new (id INTEGER PRIMARY KEY AUTOINCREMENT,api_response_json TEXT, api_req TEXT,post_params TEXT,req_type VARCHAR,timestamp TIMESTAMP)");
    // Copy the data
        database.execSQL("INSERT INTO users_new (id,api_response_json, api_req,post_params,req_type,timestamp) "
                + "SELECT id,api_response_json, api_req,post_params, req_type,timestamp "
                + "FROM old_Table_name");
    // Remove the old table
        database.execSQL("DROP TABLE old_Table_name");
    // Change the table name to the …