BackendlessGeoQuery whereClause issue

I use this code to get geopoints (whereClause = @“lastUpdate > 20130831143050”). I have “lastUpdate” key in metadata with proper date value. But this code always returns 0 geopoints. The same code with BackendlessDataQuery (not for geopoints) works fine.

GEO_POINT center;
            center.latitude = [LocationHelper sharedIntance].currentCoordinate.latitude;
            center.longitude = [LocationHelper sharedIntance].currentCoordinate.longitude;
            BackendlessGeoQuery *query = [BackendlessGeoQuery queryWithPoint:center radius:searchRadius.integerValue units:METERS categories:@[kBaaS_location_category_user]];
            query.pageSize = @100;
            query.includeMeta = @YES;
query.whereClause = @"lastUpdate > 20130831143050";
[backendless.geoService getPoints:query response:^(BackendlessCollection *collection) {

I use this code to get proper query format:

NSDateFormatter *dateFormatter = [[NSDateFormatter alloc] init];
            dateFormatter.timeZone = [NSTimeZone timeZoneForSecondsFromGMT:0];
            //YYYYMMDDHHMMSS
            dateFormatter.dateFormat = @"yyyyMMddHHmmss";
            NSString *dateString_OfLastLogin_whereICanUseQuicker = [dateFormatter stringFromDate:dateOfLastOnline_whereINeedToFetchThisUser];
            NSString *queryLastOnline = [NSString stringWithFormat:@"lastUpdate > %@", dateString_OfLastLogin_whereICanUseQuicker];

Block without this whereClause returns:

LAT:53.8986 LON:27.4309 CATEGORIES:(
    user
) METADATA:{
    lastUpdate = "08-12-2014 13:05:33 +0300";
    notFakeLocation = ok;
    objectId = "1262E383-70A6-9D26-FFC5-997AD84FED00";
    username = "eee@mail.ru";
} objectId = 1262E383-70A6-9D26-FFC5-997AD84FED00,
LAT:53.8986 LON:27.4309 CATEGORIES:(
    user
) METADATA:{
    lastUpdate = "08-12-2014 13:03:12 +0300";
    notFakeLocation = ok;
    objectId = "B068A6C5-D4FD-48EC-FF8D-DF0A5B76EB00";
    username = "www@mail.ru";
} objectId = B068A6C5-D4FD-48EC-FF8D-DF0A5B76EB00,
LAT:53.8986 LON:27.4309 CATEGORIES:(
    user
) METADATA:{
    lastUpdate = "08-12-2014 11:06:02 +0300";
    notFakeLocation = ok;
    objectId = "6956E950-11BE-BD24-FF9D-57F32C89CB00";
    username = fb262652817271897;
} objectId = 6956E950-11BE-BD24-FF9D-57F32C89CB00,
LAT:53.8986 LON:27.4308 CATEGORIES:(
    user
) METADATA:{
    lastUpdate = "19-11-2014 15:49:09 +0300";
    notFakeLocation = ok;
    objectId = "AD7DCB70-DC7F-5DE7-FFE3-BD529DDB7F00";
    username = "quicker_B213914FD5394B02A6B610879547A5FD141639121016";
} objectId = AD7DCB70-DC7F-5DE7-FFE3-BD529DDB7F00,
LAT:53.8987 LON:27.431 CATEGORIES:(
    user
) METADATA:{
    lastUpdate = "21-11-2014 09:56:47 +0300";
    notFakeLocation = ok;
    objectId = "B9346952-E16D-47E7-FF92-32BA054BD200";
    username = "quicker_B213914FD5394B02A6B610879547A5FD141637781918";
} objectId = B9346952-E16D-47E7-FF92-32BA054BD200,
LAT:53.8987 LON:27.4309 CATEGORIES:(
    user
) METADATA:{
    lastUpdate = "29-11-2014 23:03:45 +0300";
    notFakeLocation = ok;
    objectId = "53541F7D-B9AF-4CCD-FF64-E015DF158500";
    username = "dhhehrh@hhrhr.com";
} objectId = 53541F7D-B9AF-4CCD-FF64-E015DF158500,
LAT:53.8987 LON:27.4308 CATEGORIES:(
    user
) METADATA:{
    lastUpdate = "09-12-2014 17:50:37 +0300";
    notFakeLocation = ok;
    objectId = "F21DF4FD-C1B1-4408-FFD4-CAC8C485F600";
    username = vk211627839;
} objectId = F21DF4FD-C1B1-4408-FFD4-CAC8C485F600,
LAT:54.5031 LON:30.4122 CATEGORIES:(
    user
) METADATA:{
    lastUpdate = "26-11-2014 14:24:19 +0300";
    notFakeLocation = ok;
    objectId = "BFF376E3-5E3C-E487-FFC1-6DAABC61EB00";
    username = "dhdhdh@mail.ru";
} objectId = BFF376E3-5E3C-E487-FFC1-6DAABC61EB00
)

So you can see that my geopoints have lastUpdate key in metadata.

Hi, Pavel,

Currently we don’t support datetime values in metadata, so your “lastUpdate” value is persisted as string.

Hi Pavel,

This task can be implemented by the following scenarios:
http://support.backendless.com/public/attachments/0fcc030cc2d3e2d040ff609f8efa1526.png</img>

http://support.backendless.com/public/attachments/35b41e78b2846a79af9d3f9fdd8119fb.png</img>