[ https://issues.apache.org/jira/browse/DRILL-3209?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel ]
Parth Chandra updated DRILL-3209: --------------------------------- Fix Version/s: (was: 1.3.0) 1.2.0 > [Umbrella] Plan reads of Hive tables as native Drill reads when a native > reader for the underlying table format exists > ---------------------------------------------------------------------------------------------------------------------- > > Key: DRILL-3209 > URL: https://issues.apache.org/jira/browse/DRILL-3209 > Project: Apache Drill > Issue Type: Improvement > Components: Query Planning & Optimization, Storage - Hive > Reporter: Jason Altekruse > Assignee: Jason Altekruse > Fix For: 1.2.0 > > > All reads against Hive are currently done through the Hive Serde interface. > While this provides the most flexibility, the API is not optimized for > maximum performance while reading the data into Drill's native data > structures. For Parquet and Text file backed tables, we can plan these reads > as Drill native reads. Currently reads of these file types provide untyped > data. While parquet has metadata in the file we currently do not make use of > the type information while planning. For text files we read all of the files > as lists of varchars. In both of these cases, casts will need to be injected > to provide the same datatypes provided by the reads through the SerDe > interface. -- This message was sent by Atlassian JIRA (v6.3.4#6332)