java - SQLite 删除不工作

Question

我正在使用以下代码从 SQLite 表中删除某些行。

                if (!cfile.exists()) {// remove invalid db files
                    database.rawQuery("DELETE FROM "
                            + DataBaseHelper.VFS_DATABASE_TABLE + " WHERE "
                            + DataBaseHelper.VIRTUAL_SYSTEM_COLUMN_PATH // TODO
                                                // not
                                                // removing
                                                // properly
                            + " IS ?", new String[] { pathcursora.getString(0) });
                    System.out.println("DELETE FROM "
                            + DataBaseHelper.VFS_DATABASE_TABLE + " WHERE "
                            + DataBaseHelper.VIRTUAL_SYSTEM_COLUMN_PATH
                            + " IS "+pathcursora.getString(0));
                }

但是这些行没有被删除。堆栈跟踪如下:

02-28 23:13:27.564: D/NameManager.java(7098): Checking for whatever
02-28 23:13:27.587: I/System.out(7098): 1 : /mnt/sdcard/fsimages87
02-28 23:13:27.587: I/System.out(7098): 2 : /mnt/sdcard/fsimages3
02-28 23:13:27.595: I/System.out(7098): Invalid db entry for /mnt/sdcard/fsimages3 removed.
02-28 23:13:27.595: I/System.out(7098): 3 : /mnt/sdcard/fsimages2
02-28 23:13:27.603: I/System.out(7098): Invalid db entry for /mnt/sdcard/fsimages2 removed.
02-28 23:13:27.603: I/System.out(7098): 4 : /mnt/sdcard/fsimages1
02-28 23:13:27.603: I/System.out(7098): Invalid db entry for /mnt/sdcard/fsimages1 removed.
02-28 23:13:27.603: I/System.out(7098): 5 : /mnt/sdcard/fsimages
02-28 23:13:46.603: D/NameManager.java(7098): Checking for whatever
02-28 23:13:46.618: I/System.out(7098): 1 : /mnt/sdcard/fsimages87
02-28 23:13:46.618: I/System.out(7098): 2 : /mnt/sdcard/fsimages3
02-28 23:13:46.626: I/System.out(7098): Invalid db entry for /mnt/sdcard/fsimages3 removed.
02-28 23:13:46.626: I/System.out(7098): 3 : /mnt/sdcard/fsimages2
02-28 23:13:46.626: I/System.out(7098): Invalid db entry for /mnt/sdcard/fsimages2 removed.
02-28 23:13:46.626: I/System.out(7098): 4 : /mnt/sdcard/fsimages1
02-28 23:13:46.634: I/System.out(7098): Invalid db entry for /mnt/sdcard/fsimages1 removed.
02-28 23:13:46.634: I/System.out(7098): 5 : /mnt/sdcard/fsimages

我在这里做错了什么？

Answer 1

(除非您处于自动提交模式)您是否正在提交事务？

您检查过 SQL 语句的准确性吗？