This improvement adds Big Data Cluster (BDC) storage pool cache to SQL Server 2019. The BDC storage pool will use cache for improvement of query execution time by storing information read from the file from Hadoop Distributed File System (HDFS).
This improvement is included in the following cumulative update for SQL Server:
About cumulative updates for SQL Server:
Each new cumulative update for SQL Server contains all the hotfixes and all the security fixes that were included with the previous cumulative update. Check out the latest cumulative updates for SQL Server: