My code snippet is leaking - iphone

Question

The below code snippet leaks when i am trying the build and analyse thing.
What is the problem in this code , pls let me know
- ( NSString *) getSubCategoryTitle:(NSString*)dbPath:(NSString*)ID{
NSString *subCategoryTitle;
if (sqlite3_open([dbPath UTF8String], &database) == SQLITE_OK)
{
NSString *selectSQL = [NSString stringWithFormat: #"select sub_category_name from sub_categories where id = %#",ID];
NSLog(#"%# I am creashes here", selectSQL);
const char *sql_query_stmt = [selectSQL UTF8String];
sqlite3_stmt *selectstmt;
if(sqlite3_prepare_v2(database, sql_query_stmt, -1, &selectstmt, NULL) == SQLITE_OK)
{
while(sqlite3_step(selectstmt) == SQLITE_ROW)
{
subCategoryTitle = [[NSString alloc] initWithUTF8String:
(const char *) sqlite3_column_text(selectstmt, 0)];
}
}
sqlite3_finalize(selectstmt);
}
sqlite3_close(database);
return [subCategoryTitle autorelease];
}

Answer 1

You allocate instance into subCategoryTitle in a loop, but don't release the previous allocation.
subCategoryTitle = [[NSString alloc] initWithUTF8String:
(const char *) sqlite3_column_text(selectstmt, 0)];
Either (auto)release it, or directly go to the last row, and avoid this while, as it doesn't make much sense.
Example for creating only last object:
char * col_text = NULL;
while(sqlite3_step(selectstmt) == SQLITE_ROW)
{
col_text = sqlite3_column_text(selectstmt, 0);
}
if (col_text != NULL)
{
subCategoryTitle = [[NSString alloc] initWithUTF8String:col_text];
}