Adding a second table in a database

Posted by MB on Stack Overflow See other posts from Stack Overflow or by MB
Published on 2010-04-23T00:50:11Z Indexed on 2010/04/23 0:53 UTC
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Hi everyone.

I used the code provided by the NoteExample from the developers doc to create a database. Now I want to add a second table to store different data. I simply "copied" the given code, but when I try to insert into the new table I get an error saying:

"0ERROR/Database(370): android.database.sqlite.SQLiteException: no such table: routes: , while compiling: INSERT INTO routes(line, arrival, duration, start) VALUES(?, ?, ?, ?);"

Can someone please take quick look at my DbAdapter class and give me a hint or a solution? I really don't see any problem. my code compiles without any errors..

thanks in advance!

CODE:

import static android.provider.BaseColumns._ID; import android.content.ContentValues; import android.content.Context; import android.database.Cursor; import android.database.SQLException; import android.database.sqlite.SQLiteDatabase; import android.database.sqlite.SQLiteOpenHelper; import android.util.Log;

public class DbAdapter {

public static final String KEY_FROM  = "title";
public static final String KEY_TO   = "body";
public static final String KEY_ROWID = "_id";

public static final String KEY_START  = "start";
public static final String KEY_ARRIVAL  = "arrival";
public static final String KEY_LINE  = "line";
public static final String KEY_DURATION = "duration";

private static final String DATABASE_NAME    = "data";
private static final String DATABASE_NOTESTABLE  = "notes";
private static final String DATABASE_ROUTESTABLE  = "routes";

private static final String TAG = "DbAdapter";
private DatabaseHelper mDbHelper;
private SQLiteDatabase mDb;

/**
 * Database creation sql statement
 */
private static final String DATABASE_CREATE_NOTES =
        "create table notes (_id integer primary key autoincrement, "
                + "title text not null, body text not null)";

private static final String DATABASE_CREATE_ROUTES =
    "create table routes (_id integer primary key autoincrement, "
            + "start text not null, arrival text not null, " 
            + "line text not null, duration text not null);";

private static final int DATABASE_VERSION = 2;

private final Context mCtx;

private static class DatabaseHelper extends SQLiteOpenHelper {
    DatabaseHelper(Context context) {
        super(context, DATABASE_NAME, null, DATABASE_VERSION);
    }

    @Override
    public void onCreate(SQLiteDatabase db) {
        db.execSQL(DATABASE_CREATE_NOTES);
        Log.d(TAG, "created notes table");

        db.execSQL(DATABASE_CREATE_ROUTES);
      //CREATE LOKALTABLE
  db.execSQL("CREATE TABLE " + DATABASE_ROUTESTABLE + " " + 
    "(" + _ID + " INTEGER PRIMARY KEY AUTOINCREMENT, "
     + KEY_START + " TEXT NOT NULL, "
     + KEY_ARRIVAL + " TEXT NOT NULL, "
     + KEY_LINE + " TEXT NOT NULL, "
     + KEY_DURATION + " TEXT NOT NULL");

        Log.d(TAG, "created routes table");
    }

    @Override
    public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
        Log.w(TAG, "Upgrading database from version " + oldVersion + " to "
                + newVersion + ", which will destroy all old data");
        db.execSQL("DROP TABLE IF EXISTS notes");
        onCreate(db);
    }
}

/**
 * Constructor - takes the context to allow the database to be
 * opened/created
 * 
 * @param ctx the Context within which to work
 */
public DbAdapter(Context ctx) {
    this.mCtx = ctx;
}

/**
 * Open the notes database. If it cannot be opened, try to create a new
 * instance of the database. If it cannot be created, throw an exception to
 * signal the failure
 * 
 * @return this (self reference, allowing this to be chained in an
 *         initialization call)
 * @throws SQLException if the database could be neither opened or created
 */
public DbAdapter open() throws SQLException {
    mDbHelper = new DatabaseHelper(mCtx);
    mDb = mDbHelper.getWritableDatabase();
    return this;
}

public void close() {
    mDbHelper.close();
}


/**
 * Create a new note using the title and body provided. If the note is
 * successfully created return the new rowId for that note, otherwise return
 * a -1 to indicate failure.
 * 
 * @param title the title of the note
 * @param body the body of the note
 * @return rowId or -1 if failed
 */
public long createNote(String title, String body) {

    ContentValues initialValues = new ContentValues();
    initialValues.put(KEY_FROM, title);
    initialValues.put(KEY_TO, body);

    return mDb.insert(DATABASE_NOTESTABLE, null, initialValues);
}

/**
 * Create a new route using the title and body provided. If the route is
 * successfully created return the new rowId for that route, otherwise return
 * a -1 to indicate failure.
 * 
 * @param start the start time of the route
 * @param arrival the arrival time of the route
 * @param line the line number of the route
 * @param duration the routes duration 
 * @return rowId or -1 if failed
 */

public long createRoute(String start, String arrival, String line, String duration){

 ContentValues initialValues = new ContentValues();
    initialValues.put(KEY_START, start);
    initialValues.put(KEY_ARRIVAL, arrival);
    initialValues.put(KEY_LINE, line);
    initialValues.put(KEY_DURATION, duration);

    return mDb.insert(DATABASE_ROUTESTABLE, null, initialValues);
}

/**
 * Delete the note with the given rowId
 * 
 * @param rowId id of note to delete
 * @return true if deleted, false otherwise
 */
public boolean deleteNote(long rowId) {
    return mDb.delete(DATABASE_NOTESTABLE, KEY_ROWID + "=" + rowId, null) > 0;
}

/**
 * Return a Cursor over the list of all notes in the database
 * 
 * @return Cursor over all notes
 */
public Cursor fetchAllNotes() {
    return mDb.query(DATABASE_NOTESTABLE, new String[] {KEY_ROWID, KEY_FROM,
            KEY_TO}, null, null, null, null, null);
}

/**
 * Return a Cursor over the list of all routes in the database
 * 
 * @return Cursor over all routes
 */
public Cursor fetchAllRoutes() {
    return mDb.query(DATABASE_ROUTESTABLE, new String[] {KEY_ROWID, KEY_START,
      KEY_ARRIVAL, KEY_LINE, KEY_DURATION}, null, null, null, null, null);
}

/**
 * Return a Cursor positioned at the note that matches the given rowId
 * 
 * @param rowId id of note to retrieve
 * @return Cursor positioned to matching note, if found
 * @throws SQLException if note could not be found/retrieved
 */
public Cursor fetchNote(long rowId) throws SQLException {
    Cursor mCursor =
            mDb.query(true, DATABASE_NOTESTABLE, new String[] {KEY_ROWID,
                    KEY_FROM, KEY_TO}, KEY_ROWID + "=" + rowId, null,
                    null, null, null, null);
    if (mCursor != null) {
        mCursor.moveToFirst();
    }
    return mCursor;

}

/**
 * Return a Cursor positioned at the route that matches the given rowId
 * 
 * @param rowId id of route to retrieve
 * @return Cursor positioned to matching route
 * @throws SQLException if note could not be found/retrieved
 */
public Cursor fetchRoute(long rowId) throws SQLException {
    Cursor mCursor =
            mDb.query(true, DATABASE_ROUTESTABLE, new String[] {KEY_ROWID,
              KEY_START, KEY_ARRIVAL, KEY_LINE, KEY_DURATION}, KEY_ROWID + "=" + rowId, null,
                    null, null, null, null);
    if (mCursor != null) {
        mCursor.moveToFirst();
    }
    return mCursor;

}

/**
 * Update the note using the details provided. The note to be updated is
 * specified using the rowId, and it is altered to use the title and body
 * values passed in
 * 
 * @param rowId id of note to update
 * @param title value to set note title to
 * @param body value to set note body to
 * @return true if the note was successfully updated, false otherwise
 */
public boolean updateNote(long rowId, String title, String body) {
    ContentValues args = new ContentValues();
    args.put(KEY_FROM, title);
    args.put(KEY_TO, body);
    return mDb.update(DATABASE_NOTESTABLE, args, KEY_ROWID + "=" + rowId, null) > 0;
}

}

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