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使用 SQLJet 作为 Java 项目的 SQLite 库,我为我的表创建了一个索引,并使用它从数据库中获取一些东西,我不断收到错误,我不知道我做错了什么。稍微解释一下我的代码(我创建了多个表,但它们没有任何意义。)我该如何解决这个错误?

org.tmatesoft.sqljet.core.SqlJetException: Index not exists: FULL_NAME_INDEX: error code is MISUSE
    at org.tmatesoft.sqljet.core.internal.table.SqlJetTable.checkIndexName(SqlJetTable.java:285)
    at org.tmatesoft.sqljet.core.internal.table.SqlJetTable.access$300(SqlJetTable.java:46)
    at org.tmatesoft.sqljet.core.internal.table.SqlJetTable$2.runWithLock(SqlJetTable.java:149)
    at org.tmatesoft.sqljet.core.table.SqlJetDb$1.runSynchronized(SqlJetDb.java:172)
    at org.tmatesoft.sqljet.core.table.engine.SqlJetEngine.runSynchronized(SqlJetEngine.java:217)
    at org.tmatesoft.sqljet.core.table.SqlJetDb.runWithLock(SqlJetDb.java:170)
    at org.tmatesoft.sqljet.core.internal.table.SqlJetTable.lookup(SqlJetTable.java:146)
    at eureqapp.DatabaseManager.getContact(DatabaseManager.java:408)

我的代码:

public DatabaseManager() throws SqlJetException, IOException
{
    try
    {
        //Creates a database file, if it doesn't exist already.
        File dbFile = new File(databaseFileName);
        if (!dbFile.exists())
        {
            dbFile.createNewFile();

            db = SqlJetDb.open(dbFile, true);
            db.beginTransaction(SqlJetTransactionMode.WRITE);
            db.getOptions().setUserVersion(1);
            createTables();

        } else
        {
            db = SqlJetDb.open(dbFile, true);
            db.beginTransaction(SqlJetTransactionMode.WRITE);
            db.getOptions().setUserVersion(1);
        }
    } catch (Exception e)
    {
        e.printStackTrace();
    } finally
    {

        if (db.isOpen())
        {
            db.commit();
            db.close();
        }
    }
}

public static void createTables() throws SqlJetException
{
    try
    {
        if (!db.isOpen())
        {
            db.open();
        }

        db.beginTransaction(SqlJetTransactionMode.WRITE);
        db.createTable(CREATE_TABLE_CONTACT);
        db.createIndex(CREATE_CONTACT_NAME_INDEX);



    } catch (Exception e)
    {
        e.printStackTrace();
    } finally
    {

        if (db.isOpen())
        {
            db.commit();
            db.close();
        }
    }
}

我在哪里调用我的 getContact 方法

public static Contact getContact(String name) throws SqlJetException
{
    Contact c = new Contact();

    try
    {
        if (!db.isOpen())
        {
            db.open();
        }
        db.beginTransaction(SqlJetTransactionMode.READ_ONLY);

        ISqlJetTable table = db.getTable("CONTACT");
        ISqlJetCursor cursor = table.lookup("FULL_NAME_INDEX", name);

        String contactName = cursor.getString("name");
        String contactAddress = cursor.getString("address");
        String contactPlace = cursor.getString("place");
        String contactDepartment = cursor.getString("department");
        String contactTelephone = cursor.getString("telephone_number");
        String contactMobile = cursor.getString("mobile_number");
        String contactEmail = cursor.getString("email_address");
        cursor.close();
        db.close();

        c = new Contact(contactName, contactAddress, contactPlace, contactDepartment, contactTelephone, contactMobile, contactEmail);

        return c;
    } catch (Exception e)
    {
        e.printStackTrace();
    }
    return null;
}
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1 回答 1

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您是使用创建索引的同一用户还是使用应用程序中的其他用户?
如果您使用其他用户,则该用户似乎无权访问和使用索引。然后允许应用程序用户使用索引。

于 2012-11-26T09:55:24.077 回答