Question

在我的应用程序中，我试图从sqlite数据库中删除一条记录。我在DAO中使用以下代码删除。它正在处理所有其他记录期望特定的记录，尽管删除语句成功执行，我无法删除它，我尝试了所有的事情，但仍然无法弄清楚这条记录有什么特别之处（sqlite3_changes返回0表示这个记录，而对于其他人，它按预期返回1）。我正在验证它没有从表中选择删除，我总是在那里找到它。

我试图从命令行（mac上的sqlite）删除它，但我仍然无法将其删除。欣赏帮助，因为我真的非常绝望。

sqlite3_stmt *deleteVideoStmt = nil;
const char *sql = "delete from video where videoID = ?";
if(sqlite3_prepare_v2([DBUtil db], sql, -1, &deleteVideoStmt, NULL) != SQLITE_OK)
    NSAssert1(0, @"Error while creating delete video statement. '%s'", sqlite3_errmsg([DBUtil db]));
sqlite3_bind_text(deleteVideoStmt, 1, [v.videoId UTF8String], -1, SQLITE_TRANSIENT);
double t = CFAbsoluteTimeGetCurrent();
/*
if (sqlite3_exec([DBUtil db], "BEGIN IMMEDIATE TRANSACTION", NULL, NULL, NULL) != SQLITE_OK) {
    NSLog(@"couldn't begin transacton!!! %s",sqlite3_errmsg([DBUtil db]));
}
*/
int result = sqlite3_step(stmt);
if(SQLITE_DONE != result){
    NSLog(@"Error while executing video stmt. '%s'", sqlite3_errmsg([DBUtil db]));
    sqlite3_finalize(stmt);
    return NO;
}else{
    NSLog(@"Update stmt executed successfully. in  %ld ms",lroundf(((CFAbsoluteTimeGetCurrent()-t)*1000)));
    /*
    if (sqlite3_exec([DBUtil db], "COMMIT TRANSACTION", NULL, NULL, NULL) != SQLITE_OK) {
        NSLog(@"couldn't commit transacton!!! %s",sqlite3_errmsg([DBUtil db]));
    }
    */
    NSLog(@"number of rows affected = %d", sqlite3_changes([DBUtil db]));
    return YES;
}

sqlite delete不影响数据库

0 个答案: