입출력에서 SQLite로부터 한 행만 반환됩니까?

Question

SQLite에서 행을 가져 오려고하는데 어떤 이유로 첫 행만 꺼내집니다.

-(void)pullNewDataFromSqlite { 

    NSLog(@"pulling new data"); 

    NSString *fetch_sql = [NSString stringWithFormat:@"SELECT * FROM %@", tableName]; 


    NSArray *paths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES); 
    NSString *my_sqlfile = [[paths objectAtIndex:0] stringByAppendingPathComponent:databaseName]; 


    if(sqlite3_open([my_sqlfile UTF8String], &my_dbname) == SQLITE_OK) { 
     NSLog(@"pulling new data, %@", fetch_sql); 
    sqlite3_stmt *statement; 
    NSLog(@"could not prepare statement: %s\n", sqlite3_errmsg(my_dbname)); 


    if(sqlite3_prepare_v2(my_dbname, [fetch_sql UTF8String], -1, &statement, nil) == SQLITE_OK) { 


     int numberOfColumns = sqlite3_column_count(statement); 
     //sqlite3_ 


     while (sqlite3_step(statement) == SQLITE_ROW) { 
      NSLog(@"NEW SQLITE ROW"); 

      int sdcount = sqlite3_column_int(statement, 0); 
      NSLog(@"NEW SQLITE ROW number, %d", sdcount); 


      for(int a = 1; a < numberOfColumns; a++) { 

       char *field = (char *)sqlite3_column_text(statement, a); 


       NSString *fieldVal = [[NSString alloc]initWithUTF8String:field]; 
       NSString *formatout = [NSString stringWithFormat:@"%@ ", fieldVal]; 


       //match first column with first array 

       //adding each column info to the array in order 

       //user id 
       if(a == 1) { 
        NSLog(@"a is 1 and the value of the user id is %@", formatout); 
        [userIdsArray addObject:formatout]; 
       } 

       //name 
       if(a == 2) { 
        NSLog(@"a is 2 and the value of the name id is %@", formatout); 
        [namesArray addObject:formatout]; 
       } 

       //picture 
       if(a == 3) { 
        NSLog(@"a is 3 and the value of the pic id is %@", formatout); 
        [picturesArray addObject:formatout]; 
       } 




      } 
      //"call sqlite3_finalize to clean up the memory used for the statement, then we return the data." 
      sqlite3_finalize(statement); 

     } 

    } 
     } 

    [self closeDB]; 

    if(count < [userIdsArray count]) { 
     grabFollowers = YES; 
    } 

    count = [userIdsArray count]; 

    [self.tableView reloadData]; 

} 

는 또한 다른 두 행을 보여 않지만 어떤 이유는 빈 보여줍니다 여기 내 코드입니다.

Answer 1

while 루프 내에서 sqlite3_finalize으로 전화를 겁니다.

모든 행을 단계별로 실행해야 호출됩니다.

Answer 2

변화 (sqlite3_step (문) == SQLITE_ROW) 잠시 동안 (sqlite3_step (문) < = SQLITE_ROW)