Registering nicknames for HDFS data source
For each HDFS server definition that you register, you must register a nickname for each collection that you want to access. Use these nicknames, instead of the names of the data source objects, when you query the HDFS data source servers.
About this task
When you register a nickname on a parquet file, the federated server establishes a mapping between the federated server columns and the columns of parquet data. The mapping is created automatically by federation server. This is similar to relational database except the mapping is created in ODBC or JDBC driver. Nickname is a mechanism to resolve Db2 column and parquet column mapping.