This query cost 265 RU/s:
SELECT top 1 * FROM c
WHERE c.CollectPackageId = 'd0613cbb-492b-4464-b66b-3634b5571826'
ORDER BY c.StartFetchDateTimeUtc DESC
StartFetchDateTimeUtc is a string property, serialized by using the Cosmos API
This query cost 5 RU/s:
SELECT top 1 * FROM c
WHERE c.CollectPackageId = 'd0613cbb-492b-4464-b66b-3634b5571826'
ORDER BY c._ts DESC
_ts is a built in field, a Unix-based numeric timestamp.
Example result (only including this field and _ts):
"StartFetchDateTimeUtc": "2017-08-08T03:35:04.1654152Z",
"_ts": 1502163306
The index is in place and follows the suggestions & tutorials how to configure a sortable string/timestamp. It looks like:
{
"path": "/StartFetchDateTimeUtc/?",
"indexes": [
{
"kind": "Range",
"dataType": "String",
"precision": -1
}
]
}
