Posted On: Apr 4, 2019
Amazon DocumentDB (with MongoDB compatibility) is a fast, scalable, highly available, and fully managed document database service that supports MongoDB workloads.
Amazon DocumentDB continues to increase compatibility with MongoDB and today added support for additional aggregation pipeline operators that allow you to compose powerful aggregations your documents. The new capabilities include seven aggregation string operators ($indexOfCP, $indexOfBytes, $strLenCP, $strLenBytes, $toLower, $toUpper, $split), nine date time operators ($dayOfYear, $dayOfMonth, $dayOfWeek, $year, $month, $hour, $minute, $second, and $millisecond), and the $sample aggregation pipeline stage.
For more information, please see the AWS Database Blog: Using new aggregation pipeline capabilities in Amazon DocumentDB to build powerful aggregation queries