我和使用sqlite数据库的应用程序。 db具有存储在Transactions表中的事务数据。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。我试图将Transactions表的名称更改为OldTrasnsactions，然后重新创建事务表并从OldTransactions复制数据。
Android在编译Alter语句时说“事务”表不存在。我正在执行onUpgrade时正确递增版本号。
有谁知道我做错了什么？
下面是错误和SqliteOpenHelper类。
注意，交易中的额外新字段是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);
}
}
答案 0 :(得分：1)
您的事务表的名称似乎是“事务”，但您正在寻找“TABLETRANSACTIONS”，可能是因为在Java语句和SQL之间进行转换。与C_ID等其他常量的情况相同。
更改所有SQL语句以引用事务或使用常量值，如下所示：
db.execSQL("ALTER TABLE "+TABLETRANSACTIONS+" RENAME TO Old"+TABLETRANSACTIONS);