Java

Incrementally update an imported table In  CDP Private Cloud Base , updating imported tables involves importing incremental changes made to the original table using Sqoop and then merging changes with the tables imported into Hive. After ingesting data from an operational database to Hive, you usually need to set up a process for periodically synchronizing the imported table with the operational database table. The base table is a Hive-managed table that was created during the first data ingestion. Incrementally updating Hive tables from operational database systems involves merging the base table and change records to reflect the latest record set. You create the incremental table as a Hive external table, typically from CSV data in HDFS, to store the change records. This external table contains the changes (INSERTs and UPDATEs) from the operational database since the last data ingestion. Generally, the table is partitioned and only the latest partition is updated, making this pro...