I can't trap FMDB empty resultset - iphone

Question

I am having trouble trapping an empty result set from FMDB.
The code is below. I am getting NSLog's from the database opening and closing and NSLog "1" but none of the ones in the If statement!
If I have data in the database its fine, but I want to trap and edit result if the database is empty.
[self openDatabase];
NSNumberFormatter *nfcurrency = [[NSNumberFormatter alloc]init];
[nfcurrency setNumberStyle:NSNumberFormatterCurrencyStyle];
[nfcurrency setLocale:[NSLocale currentLocale]];
FMResultSet *result = [[self getDatabase]executeQuery:#"SELECT BFNeeded FROM tblBets ORDER BY pk DESC LIMIT 1,1;"];
//FMResultSet *result = [[self getDatabase]executeQuery:#"SELECT BFNeeded FROM tblBets ORDER BY pk DESC LIMIT 1,1;"];
NSLog(#"1");
if (result == NULL) {
NSLog(#"Last BFNeeded Result = nil");
} else {
while ([result next]) {
NSLog(#"HERE");
NSString *lastBFNeeded = [nfcurrency stringFromNumber:[NSNumber numberWithDouble:[result doubleForColumn:#"BFNeeded"]]];
NSLog(#"lastBFNeeded=%#",lastBFNeeded);
}
}
NSLog(#"ClosingDB");
[self closeDatabase];
Continuing after getting first reply:
I can't get hasAnotherRow to work as expected.
I have this code:
FMResultSet *result = [[self getDatabase]executeQuery:#"SELECT BFNeeded FROM tblBets ORDER BY pk DESC LIMIT 0,1;"];
if (result == nil) {
NSLog(#"Last BFNeeded Result = nil");
}
else {
NSLog(#"has results1: %#", [result hasAnotherRow] ? #"YES" : #"NO");
while ([result next]) {
NSLog(#"has results2: %#", [result hasAnotherRow] ? #"YES" : #"NO");
}
}
With a database that returns a result, I get result1 NO, result2 YES so I assume the hasAnotherRow must go inside the while ([result next]) loop.
However with an empty database, I get result1 NO and it doesn't even get to result2!

Answer 1

the "result" will never be nil for a query that produces 0 rows.
also, you shouldn't compare object pointers to NULL -- compare to nil. See this question: NULL vs nil in Objective-C
try this:
FMResultSet *result = [[self getDatabase]executeQuery:#"SELECT BFNeeded FROM tblBets ORDER BY pk DESC LIMIT 1,1;"];
NSLog ( #"has results: %#", [result hasAnotherRow] ? #"YES" : #"NO" );

Answer 2

NSInteger count;
query=[NSString stringWithFormat:#"select Count(*) from %# where name = 'brandon' ",dbName];
results = [database executeQuery:query ];
while([results next]) {
count = [results intForColumnIndex:0];
NSLog(#"count:%d",count);
}
will set count equal to zero if there is no entry