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使用SQLJet作爲Java項目的SQLite庫時,我爲我的表創建索引並使用它從數據庫中獲取某些內容,並且一直收到錯誤,並且我不知道我做錯了。說了一下我的代碼(我創建了多個表,但他們沒有任何意義。)我該如何解決這個錯誤?找不到創建的索引
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)
我的代碼:
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();
}
}
}
而且,我打電話給我的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;
}
這一切都在同一個正在運行的應用程序中完成,並且據我所知,數據庫正在被單個用戶使用。每一個不使用索引的寫/讀方法都可以工作。 – user1810737