Question

imagine an xml file with 5000 sets of data. While parsing , i NSLog an element and it returned me 5000 sets of data, but i have a loop that is inserting the data into the sqlite3 database. It seems to stopped inserting around after 400+. I looked around and found out that it gobbles up memory?in the leaks instrument, the responsible library was libsqlite3.dylib and the Responsible frame was sqlite3MemMalloc so how do i solve it now? below is my code. The method is in NSXMLParser didEndElement method.

- (void)parser:(NSXMLParser *)parser didEndElement:(NSString *)elementName namespaceURI:(NSString *)namespaceURI qualifiedName:(NSString *)qName{     
//NSLog(@"ended element: %@", elementName);
MedicalBedAppDelegate *appDelegate = (MedicalBedAppDelegate *)[[UIApplication sharedApplication] delegate];

if ([elementName isEqualToString:@"Status"]) {

    //setup some globals
    databaseName = @"MedicalBedDatabase.sql";

    NSArray *documentPaths = NSSearchPathForDirectoriesInDomains(NSDocumentDirectory, NSUserDomainMask, YES);
    NSString *documentsDir = [documentPaths objectAtIndex:0];
    databasePath = [documentsDir stringByAppendingPathComponent:databaseName];

    //Method Stackoverflow
    sqlite3 *database;
    NSInteger i;
    NSString *p = [[[NSString alloc]init] autorelease];
    NSString *p2 = [[[NSString alloc]init] autorelease];

    NSString *str = [NSString stringWithFormat:@"INSERT INTO UsageData(Date,Time,NoOfMovementRegistered,BreathingRate,TimeSinceLastMovement,Status,bID) VALUES ('%@','%@','%@','%@','%@','%@','%@')",currentDate,currentTime,currentNoMove,currentNoBreathe,currentTimeSinceLastMovement,currentStatus,currentBedNo];
    const char *sqlStmt = [str UTF8String];
    sqlite3_stmt *cmp_sqlStmt;

    NSString *str1 = [NSString stringWithFormat:@"INSERT INTO XMLEntryID(EntryID,bID) VALUES ('%@','%@')",currentEntryID ,p];
    const char *sqlStmt1 = [str1 UTF8String];
    sqlite3_stmt *cmp_sqlStmt1;
    if(sqlite3_open([databasePath UTF8String], &database) == SQLITE_OK) {
    for (i = 0; i<([appDelegate.beds count]) ; i++) {
        Bed *aBedInstance = (Bed *)[appDelegate.beds objectAtIndex:i];
        EntryID *aEntryIDInstance = (EntryID *)[appDelegate.entryids objectAtIndex:i];

        p = aBedInstance.bedno;
        p2 = aEntryIDInstance.bedID;

        if ([p intValue] == [currentBedNo intValue]) {
            if ([aEntryIDInstance.bedID intValue] == [currentBedNo intValue])
                    {
                      if ([aEntryIDInstance.entryID intValue] > [currentEntryID intValue] && [aEntryIDInstance.bedID intValue] == [currentBedNo intValue]) {
                          //NSLog(@"xmlEntryID is lower then dBCount");
                      } 

                      else if ([aEntryIDInstance.entryID intValue] == [currentEntryID intValue] && [aEntryIDInstance.bedID intValue] == [currentBedNo intValue])
                      {
                          //This if else if statement is needed because if the dbCount == currentEntryID , it would still consider it 
                          // to be dbCount < currentEntryID
                          //NSLog(@" IT IS EQUAL ");    
                      }
                      else if ([aEntryIDInstance.entryID intValue] < [currentEntryID intValue] && [aEntryIDInstance.bedID intValue] == [currentBedNo intValue] )  {
                          ////NSLog(@"dBCount at selectionScreen = %d",[[appDelegate.dBCount objectAtIndex:0] intValue]);
                          //NSLog(@"currentEntryID at selectionScreen = %d",[currentEntryID intValue]);

                          //NSLog(@"xmlEntryID is higher then dBCount");




                              if(sqlite3_prepare_v2(database, sqlStmt, -1, &cmp_sqlStmt, NULL) == SQLITE_OK)
                              {
                                  int returnValue = sqlite3_prepare_v2(database, sqlStmt, -1, &cmp_sqlStmt, NULL);
                                  ((returnValue ==SQLITE_OK)? NSLog(@"INSERT into USAGEDATA SUCCESS") : NSLog(@"INSERT into USAGEDATA Fail"));
                                  sqlite3_step(cmp_sqlStmt);
                              }
                              sqlite3_finalize(cmp_sqlStmt);
                              sqlite3_close(database);


                              if(sqlite3_prepare_v2(database, sqlStmt1, -1, &cmp_sqlStmt1, NULL) == SQLITE_OK)
                              {
                                  int returnValue = sqlite3_prepare_v2(database, sqlStmt, -1, &cmp_sqlStmt1, NULL);
                                  ((returnValue ==SQLITE_OK) ? NSLog(@"INSERT into XMLEntryID SUCCESS") : NSLog(@"INSERT into XMLEntryID Fail"));
                                  sqlite3_step(cmp_sqlStmt1);
                              }
                              sqlite3_finalize(cmp_sqlStmt1);
                              sqlite3_close(database);

                      }
            } 
        }else if ([p intValue] != [currentBedNo intValue]) {

        }
   }
    }
    NSLog(@"adding currentEntryID: %@", currentEntryID);

    sqlite3_close(database);

}

}

Answer 1

i solved it, instead of using the prepare statement, i used exec statement instead

if (sqlite3_exec(database, [str UTF8String], NULL, NULL, &errorMsg)!=SQLITE_OK) {
                              NSAssert1(0,@"Error updating tables: %s",errorMsg);
                              sqlite3_free(errorMsg);
                          }
                        sqlite3_close(database);