Question

Iam trying to read data from a table.
Initially it is empty. If i tried to read at that time it will cause an exception.
My code is given Below

-(NSMutableArray *) selectDataFrom:(NSString *) tableName
{   
    NSString *qsql = [NSString stringWithFormat:@"SELECT * FROM '%@' ",tableName];  
    sqlite3_stmt *statement;
    if (sqlite3_prepare_v2( dataBase, [qsql UTF8String], -1, &statement, nil) == SQLITE_OK)
    {
        NSLog(@"INSIDE IF");                    
        while (sqlite3_step(statement) == SQLITE_ROW) 
        {
            NSLog(@"INSIDE WHILE");         
            // my code
        }
    }
    return allData; 
}   

The first NSLog(“INDISE IF”); is printed.
But the second one is not printing.

Mention some books to learn sqlite3 statements of iPhone [ eg: sqlite_prepare_v2();] not SQL

[ Sorry for my poor English]

THIS IS THE FULL CODE

-(NSMutableArray *) selectDataFrom:(NSString *) tableName
{

    allData = [[NSMutableArray alloc] init];
    NSString *qsql = [NSString stringWithFormat:@"SELECT * FROM '%@' ",tableName];
    sqlite3_stmt *statement;

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


        while (sqlite3_step(statement) == SQLITE_ROW) 
        {
            NSLog(@"REACHED 1");            
            myProgram = [[Programs alloc] init];    

            char *date  = (char *) sqlite3_column_text(statement, 0);
            myProgram.nss_Date = [[NSString alloc] initWithUTF8String:date];            

            char *type  = (char *) sqlite3_column_text(statement, 3);
            myProgram.nss_Type = [[NSString alloc]initWithUTF8String:type];

            [nsma_allDonorsMA addObject:d_OneDonor];        
        }
    }
    else {
        //      NSLog(@"failed to select data");

    }
    return allData;
}

Answer 1

Try enabled breakpoints on exceptions and run your app in the debugger. It will show you exactly where you are calling objectAtIndex:. (It is not in the above code)