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Anja Gruenheid commented on HIVE-1940: -------------------------------------- Here is the metastore model that I generated with MySQL Workbench: http://home.in.tum.de/~gruenhei/HiveMetaStore.pdf Comparing this model to the one displayed in the index wiki, I noticed the two tables PARTITIONS and PARTITION_KEY_VALS are missing in my model. Do you have any idea how I can create them? I tried adding partitions on tables, but that just created entries in table PARTITION_KEYS. > Query Optimization Using Column Metadata and Histograms > ------------------------------------------------------- > > Key: HIVE-1940 > URL: https://issues.apache.org/jira/browse/HIVE-1940 > Project: Hive > Issue Type: New Feature > Components: Metastore, Query Processor > Reporter: Anja Gruenheid > > The current basis for cost-based query optimization in Hive is information > gathered on tables and partitions. To make further improvements in query > optimization possible, the next step is to develop and implement > possibilities to gather information on columns as discussed in issue HIVE-33. > After that, an implementation of histograms is a possible option to use and > collect run-time statistics. Next to the actual implementation of these > features, it is also necessary to develop a consistent storage model for the > MetaStore. -- This message is automatically generated by JIRA. - For more information on JIRA, see: http://www.atlassian.com/software/jira