我有一个使用 sqlite DB 的应用程序。数据库的事务数据存储在事务表中。我想在 Transactions 表中添加一个额外的字段，同时保留以前数据库中的旧数据。
我已经覆盖了 SqliteOpenHelper 类中的 onUpgrade 方法。我尝试将 Transactions 表的名称更改为 OldTrasnsactions，然后重新创建 transactions 表并从 OldTransactions 复制数据。
Android 在编译 Alter 语句时说 Transactions 表不存在。在执行 onUpgrade 时，我正在正确增加版本号。
有谁知道我做错了什么？
下面是错误和 SqliteOpenHelper 类。
注意 Transactions 中额外的新字段是 C_TRANSACTIONS_DRIVER
.
10-28 14:33:12.550: E/AndroidRuntime(3171): FATAL EXCEPTION: IntentService[SendOutstandingTransactions]
10-28 14:33:12.550: E/AndroidRuntime(3171): android.database.sqlite.SQLiteException: no such table: TABLETRANSACTIONS (code 1): , while compiling: ALTER TABLE TABLETRANSACTIONS RENAME TO OldTABLETRANSACTIONS
10-28 14:33:12.550: E/AndroidRuntime(3171): at android.database.sqlite.SQLiteConnection.nativePrepareStatement(Native Method)
10-28 14:33:12.550: E/AndroidRuntime(3171): at android.database.sqlite.SQLiteConnection.acquirePreparedStatement(SQLiteConnection.java:909)
10-28 14:33:12.550: E/AndroidRuntime(3171): at android.database.sqlite.SQLiteConnection.prepare(SQLiteConnection.java:520)
10-28 14:33:12.550: E/AndroidRuntime(3171): at android.database.sqlite.SQLiteSession.prepare(SQLiteSession.java:588)
10-28 14:33:12.550: E/AndroidRuntime(3171): at android.database.sqlite.SQLiteProgram.<init>(SQLiteProgram.java:58)
10-28 14:33:12.550: E/AndroidRuntime(3171): at android.database.sqlite.SQLiteStatement.<init>(SQLiteStatement.java:31)
10-28 14:33:12.550: E/AndroidRuntime(3171): at android.database.sqlite.SQLiteDatabase.executeSql(SQLiteDatabase.java:1719)
10-28 14:33:12.550: E/AndroidRuntime(3171): at android.database.sqlite.SQLiteDatabase.execSQL(SQLiteDatabase.java:1650)
10-28 14:33:12.550: E/AndroidRuntime(3171): at com.carefreegroup.rr3.LoginValidate$DBHelper.onUpgrade(LoginValidate.java:643)
10-28 14:33:12.550: E/AndroidRuntime(3171): at android.database.sqlite.SQLiteOpenHelper.getDatabaseLocked(SQLiteOpenHelper.java:257)
10-28 14:33:12.550: E/AndroidRuntime(3171): at android.database.sqlite.SQLiteOpenHelper.getReadableDatabase(SQLiteOpenHelper.java:188)
10-28 14:33:12.550: E/AndroidRuntime(3171): at com.carefreegroup.rr3.LoginValidate.queryAllFromCarer(LoginValidate.java:275)
10-28 14:33:12.550: E/AndroidRuntime(3171): at com.carefreegroup.rr3.SendOutstandingTransactions.onHandleIntent(SendOutstandingTransactions.java:63)
10-28 14:33:12.550: E/AndroidRuntime(3171): at android.app.IntentService$ServiceHandler.handleMessage(IntentService.java:65)
10-28 14:33:12.550: E/AndroidRuntime(3171): at android.os.Handler.dispatchMessage(Handler.java:99)
10-28 14:33:12.550: E/AndroidRuntime(3171): at android.os.Looper.loop(Looper.java:158)
10-28 14:33:12.550: E/AndroidRuntime(3171): at android.os.HandlerThread.run(HandlerThread.java:60)
10-28 14:33:12.560: E/EmbeddedLogger(508): App crashed! Process: com.carefreegroup.rr3
10-28 14:33:12.565: E/EmbeddedLogger(508): App crashed! Package: com.carefreegroup.rr3 v13 (2.0.5e)
10-28 14:33:12.570: E/EmbeddedLogger(508): Application Label: CareFree
private class DBHelper extends SQLiteOpenHelper {
// database name and version number
public static final String DB_NAME = "carefreemobiledb.db";
public static final int DB_VERSION = 51;
// table names
public static final String TABLETRANSACTIONS = "transactions";
public DBHelper() {
super(context, DB_NAME, null, DB_VERSION);
}
@Override
public void onCreate(SQLiteDatabase db) {
String sqlToCreateTransactionsTable = String
.format("create table %s ( %s INTEGER primary key, %s TEXT, %s TEXT, %s TEXT, %s TEXT, %s TEXT,"
+ " %s TEXT, %s TEXT, %s INT, %s TEXT, %s TEXT )",
TABLETRANSACTIONS, C_ID, C_TYPE, C_COMPANY_ID,
C_PERSON_ID, C_NAME, C_TAG_ID, C_STATUS,
C_TAG_SCAN_TIME, C_TAG_SENTSERVER_TIME,
C_TRANSACTIONS_LATITUDE, C_TRANSACTIONS_LONGITUDE);
db.execSQL(sqlToCreateTransactionsTable);
Log.e(TAG, "oncreate " + sqlToCreateTransactionsTable);
}
@Override
public void onUpgrade(SQLiteDatabase db, int oldVersion, int newVersion) {
// db.execSQL("drop table if exists " + TABLETRANSACTIONS);
// db.execSQL("drop table if exists " + TABLECARER);
// db.execSQL("drop table if exists " + TABLETRANSACTIONSMAP);
// db.execSQL("drop table if exists " + TABLEPHONE);
// db.execSQL("drop table if exists " + TABLECOMPANYID);
// db.execSQL("drop table if exists " + TABLEBACKGROUNDSERVICES);
// db.execSQL("drop table if exists " + TABLEMESSAGE);
// db.execSQL("drop table if exists " + TABLEDUPLICATETRANSACTIONS);
// db.execSQL("drop table if exists " + TABLECACHEDROTA);
// Log.e(TAG, "onUpgrade dropped all tables apart from message and transactions");
db.execSQL("ALTER TABLE TABLETRANSACTIONS RENAME TO OldTABLETRANSACTIONS");
db.execSQL("CREATE TABLE TABLETRANSACTIONS(C_ID INTEGER PRIMARY KEY, C_TYPE TEXT," +
" C_COMPANY_ID TEXT,C_PERSON_ID TEXT, C_NAME TEXT, C_TAG_ID TEXT, C_STATUS TEXT,C_TAG_SCAN_TIME TEXT, " +
"C_TAG_SENTSERVER_TIME INT,C_TRANSACTIONS_LATITUDE TEXT, C_TRANSACTIONS_LONGITUDE TEXT, C_TRANSACTIONS_DRIVER TEXT)");
db.execSQL("INSERT INTO TABLETRANSACTIONS (C_ID, C_TYPE, C_COMPANY_ID, C_PERSON_ID, C_NAME, C_TAG_ID, C_STATUS, C_TAG_SCAN_TIME, " +
"C_TAG_SENTSERVER_TIME, C_TRANSACTIONS_LATITUDE, C_TRANSACTIONS_LONGITUDE, C_TRANSACTIONS_DRIVER ) SELECT C_ID, C_TYPE, C_COMPANY_ID, " +
"C_PERSON_ID, C_NAME, C_TAG_ID, C_STATUS, C_TAG_SCAN_TIME, C_TAG_SENTSERVER_TIME, C_TRANSACTIONS_LATITUDE, C_TRANSACTIONS_LONGITUDE FROM OldTABLETRANSACTIONS");
db.execSQL("DROP TABLE OldTABLETRANSACTIONS");
Log.e(TAG, " SQLiteOpenHelper onUpgrade: finished copying old data to new transaction table");
Toast.makeText(nfcscannerapplication, "SQLiteOpenHelper onUpgrade: finished copying old data to new transaction table", Toast.LENGTH_LONG);
//this.onCreate(db);
}
}