set datanucleus.cache.collections=false; set datanucleus.cache.collections.lazy=false; create database db1; show databases; create database db2 with dbproperties ( 'mapred.jobtracker.url'='http://my.jobtracker.com:53000', 'hive.warehouse.dir' = '/user/hive/warehouse', 'mapred.scratch.dir' = 'hdfs://tmp.dfs.com:50029/tmp'); describe database db2; describe database extended db2; set datanucleus.cache.collections=false; set datanucleus.cache.collections.lazy=false; alter database db2 set dbproperties ( 'new.property' = 'some new props', 'hive.warehouse.dir' = 'new/warehouse/dir'); describe database extended db2;