java.lang.RuntimeException: An error occurred while executing doInBackground()
	at android.os.AsyncTask$4.done(AsyncTask.java:399)
	at java.util.concurrent.FutureTask.finishCompletion(FutureTask.java:383)
	at java.util.concurrent.FutureTask.setException(FutureTask.java:252)
	at java.util.concurrent.FutureTask.run(FutureTask.java:271)
	at android.os.AsyncTask$SerialExecutor$1.run(AsyncTask.java:289)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1167)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:641)
	at java.lang.Thread.run(Thread.java:919)
Caused by: android.database.sqlite.SQLiteException: no such column: class (code 1 SQLITE_ERROR): , while compiling: select sub_ord_photo_name, emp_id, sub_ord_first_name as name, class  from sub_ordinates_for_images
	at android.database.sqlite.SQLiteConnection.nativePrepareStatement(Native Method)
	at android.database.sqlite.SQLiteConnection.acquirePreparedStatement(SQLiteConnection.java:986)
	at android.database.sqlite.SQLiteConnection.prepare(SQLiteConnection.java:593)
	at android.database.sqlite.SQLiteSession.prepare(SQLiteSession.java:590)
	at android.database.sqlite.SQLiteProgram.<init>(SQLiteProgram.java:61)
	at android.database.sqlite.SQLiteQuery.<init>(SQLiteQuery.java:37)
	at android.database.sqlite.SQLiteDirectCursorDriver.query(SQLiteDirectCursorDriver.java:46)
	at android.database.sqlite.SQLiteDatabase.rawQueryWithFactory(SQLiteDatabase.java:1450)
	at android.database.sqlite.SQLiteDatabase.rawQuery(SQLiteDatabase.java:1382)
	at com.entitcs.office_attendance.local_database.DatabaseHandler.getInfoFromDB(DatabaseHandler.java:1437)
	at com.entitcs.office_attendance.FaceRecognitionRelated.object.FaceRecognitionActivity$7.doInBackground(FaceRecognitionActivity.java:734)
	at com.entitcs.office_attendance.FaceRecognitionRelated.object.FaceRecognitionActivity$7.doInBackground(FaceRecognitionActivity.java:727)
	at android.os.AsyncTask$3.call(AsyncTask.java:378)
	at java.util.concurrent.FutureTask.run(FutureTask.java:266)
	... 4 more