Leaks with NSStirng - nsstring

Question

Iam getting memory leaks in below code.
Is this is the proper way to handle memory?
Please do correct me.
-(void)getholidays
{
if (idarray!=nil) {
[idarray release];
idarray=nil;
}
idarray=[[NSMutableArray alloc]init];
if (Countryarray!=nil) {
[Countryarray release];
Countryarray=nil;
}
Countryarray =[[NSMutableArray alloc] init];
if (Holidaynamearray!=nil) {
[Holidaynamearray release];
Holidaynamearray=nil;
}
Holidaynamearray =[[NSMutableArray alloc] init];
if (Datearray!=nil) {
[Datearray release];
Datearray=nil;
}Datearray =[[NSMutableArray alloc] init];
if (Dayarray!=nil) {
[Dayarray release];
Dayarray=nil;
}Dayarray =[[NSMutableArray alloc] init];
if (Favoritearray!=nil) {
[Favoritearray release];
Favoritearray=nil;
}
Favoritearray =[[NSMutableArray alloc] init];
NSString *destinationPath = [self getdestinationPath];
const char *dbpath = [destinationPath UTF8String];
sqlite3_stmt *statement;
if (sqlite3_open(dbpath, &database) == SQLITE_OK)
{
NSString *querySQL;
NSDate *today = [NSDate date];
NSDateFormatter* formatter = [[[NSDateFormatter alloc] init] autorelease];
[formatter setDateFormat:#"MMMM-dd-yyyy"];
NSString *Todaystrng = [formatter stringFromDate:today];
NSLog(#"today date %#",Todaystrng);
querySQL=[NSString stringWithFormat:#"SELECT * FROM Holiday_Table WHERE CountryName in (SELECT Country_Name from Country WHERE Country_Selected =1) ORDER BY Date ASC "];
const char *query_stmt = [querySQL UTF8String];
if (sqlite3_prepare_v2(database, query_stmt, -1, &statement, NULL) == SQLITE_OK)
{
NSLog(#"success");
while (sqlite3_step(statement) == SQLITE_ROW)
{
NSString *idstringfromdb=[[NSString alloc] initWithUTF8String:(const char *) sqlite3_column_text(statement, 0)];
NSString *countrynamestringfromdb=[[NSString alloc] initWithUTF8String:(const char *) sqlite3_column_text(statement, 1)];
NSString *holidaynamestringfromdb=[[NSString alloc] initWithUTF8String:(const char *) sqlite3_column_text(statement, 2)];
NSString *datestringfromdb=[[NSString alloc] initWithUTF8String:(const char *) sqlite3_column_text(statement, 3)];
//Below line gets leaking
NSString *daystringfromdb=[[NSString alloc] initWithUTF8String:(const char *) sqlite3_column_text(statement, 4)];
//Belowline gets leaking
NSString *favoritestringfromdb=[[NSString alloc] initWithUTF8String:(const char *) sqlite3_column_text(statement, 5)];
[idarray addObject:idstringfromdb];
[idstringfromdb release];
idstringfromdb=nil;
[Countryarray addObject:countrynamestringfromdb];
[countrynamestringfromdb release];
countrynamestringfromdb=nil;
[Holidaynamearray addObject:holidaynamestringfromdb];
[holidaynamestringfromdb release];
holidaynamestringfromdb=nil;
[Datearray addObject:datestringfromdb];
[datestringfromdb release];
datestringfromdb=nil;
[Dayarray addObject:daystringfromdb];
[daystringfromdb release];
daystringfromdb=nil;
[Favoritearray addObject:favoritestringfromdb];
[favoritestringfromdb release];
favoritestringfromdb=nil;
}
}
sqlite3_finalize(statement);
}
sqlite3_close(database);
}