Deprecated features are not implemented
What changes in Deprecated features are not implemented compared with MongoDB and what your application has to do.
This difference is of the Deprecated kind.
What MongoDB does
Deprecated features keep working until a release removes them.
What TeselaDB does
What MongoDB marks as deprecated in version 9.0 does not exist. It answers as MongoDB answers to what does not exist. For example, $substr, the plan cache index filters, filemd5, logout and the *Preview query types of Queryable Encryption.
What your application has to do
Replace each use with its successor, the one the MongoDB documentation names. The affected elements are in the list below.
Affected elements
planCacheClearFiltersplanCacheListFiltersplanCacheSetFilterlogoutcleanupOrphanedfilemd5getAuditConfigsetAuditConfig$substrknnBetaspandateFacetknnVectornumberFacetstringFacetmongocryptd