SQLite:DB错误,"内存不足"

Question

我正在使用FMDB创建并向ad/b添加记录.创建d/b的方法是:

//-----------------------    checkIfDatabaseExists    -----------------|
+ (void) openCreateDB  {

    NSArray *searchPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);  // Get the path to the database file
    NSString *documentPath = [searchPaths objectAtIndex:0];
    NSString *databasePath = [documentPath stringByAppendingPathComponent:@"ppcipher.s3db"];
    NSLog(@"d/b path: /%@", databasePath);

    char * errmsg = nil;   

    NSFileManager *fileManager = [NSFileManager defaultManager];
    [fileManager removeItemAtPath:databasePath error:NULL];  //  <------------  delete d/b  TESTING ONLY! 

    BOOL fileExists = [fileManager fileExistsAtPath:databasePath];
    if(!fileExists)  {
        FMDatabase* _db = [FMDatabase databaseWithPath: databasePath]; 

        if (![_db open]) {
            NSLog(@"Could not open/create database");
        }

        [_db executeUpdate:@"CREATE TABLE CardData (card_id TEXT PRIMARY KEY NOT NULL, card_name TEXT NOT NULL, "
         @"card_type TEXT, code_val TEXT, create_date TEXT DEFAULT CURRENT_DATE, user_notes TEXT, gps_loc TEXT)"];

        if(errmsg != nil)
            NSLog(@"error: %s", errmsg);  //  DEBUGGING ONLY!  (REMOVE when done!)
    }
    return;
}

这导致没有错误.但是,当我接下来在"打开"之后执行一次(1)"插入"时,我从FMDB收到错误,说DB错误:7"内存不足".在此之后的每个sql语句中,我都得到相同的错误(只有d/b的创建没有错误!).这是插入的代码:

//---------------------    addRecordToDatabase    ----------------------|
+ (void)addRecordToDatabase: (ZBarSymbol *)symbol  {


    FMDatabase* _db = [FMDatabase sharedFMDatabase];

    [_db setLogsErrors:1];  //  log all of the SQLite d/b errors

    [_db executeUpdate: @"INSERT INTO CardData (card_id, card_name, code_val) VALUES (?, ?, ?)", symbol.data, @"Test Card", symbol.typeName, nil];

}

这是一个非常小的d/b,数据量最小.我跑了Inspector,没有什么与众不同的.任何建议将不胜感激.

Answer 1

我认为你应该调用[_db open]你的代码,应该修复它.似乎FMDB中的"内存不足错误"也意味着由于缺少表或连接未打开而导致的错误.