Question

使用SQLJet作为Java项目的SQLite库，我为我的表创建一个索引并使用它来从数据库中获取内容并且我不断收到错误，我不知道我做错了什么。稍微改写了我的代码（我创建了多个表，但它们没有任何意义。）如何修复此错误？

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();
        }
    }
}

我调用getContact方法的地方

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;
}

Answer 1

您是使用您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，则看起来用户没有授权来访问和使用索引。然后允许应用程序用户使用索引。

找不到创建的索引

1 个答案: