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The following page has been changed by JeffHammerbacher: http://wiki.apache.org/hadoop/Hive/Roadmap ------------------------------------------------------------------------------ #pragma section-numbers 2 Before adding to the list below, please check [https://issues.apache.org/jira/browse/HADOOP/component/12312455 JIRA] to see if a ticket has already been opened for the feature. If not, please open a ticket on the [http://issues.apache.org/jira/browse/HADOOP Hadoop JIRA] and select "contrib/hive" as the component and also update the following list. + + = 10/27/08 Roadmap Update = + + 1. Integrating Dynamic SerDe with the DDL. (Zheng/Pete) - This allows the users to create typed tables along with list and map types from the DDL + 2. Support for Statistics. (Ashish) - These stats are needed to make optimization decisions + 3. Join Optimizations. (Prasad) - Mapside joins, semi join techniques etc to do the join faster + 4. Predicate Pushdown Optimizations. (Namit) - pushing predicates just above the table scan for certain situations in joins as well as ensuring that only required columns are sent across map/reduce boundaries + 5. Group By Optimizations. (Joydeep) - various optimizations to make group by faster + 6. Optimizations to reduce the number of map files created by filter operations. (Dhrubha) - Filters with a large number of mappers produces a lot of files which slows down the following operations. This tries to address problems with that. + 7. Transformations in LOAD. (Joydeep) - LOAD currently does not transform the input data if it is not in the format expected by the destination table. + 8. Schemaless map/reduce. (Zheng) - TRANSFORM needs schema while map/reduce is schema less. + 9. Improvements to TRANSFORM. (Zheng) - Make this more intuitive to map/reduce developers - evaluate some other keywords etc.. + 10. Error Reporting Improvements. (Pete) - Make error reporting for parse errors better + 11. Help on CLI. (Joydeep) - add help to the CLI + 12. Explode and Collect Operators. (Zheng) - Explode and collect operators to convert collections to individual items and vice versa. + 13. Propagating sort properties to destination tables. (Prasad) - If the query produces sorted we want to capture that in the destination table's metadata so that downstream optimizations can be enabled. + + Other contributions from outside FB ... + 1. JDBC driver (Michi Mutsuzaki @ stanford.edu, Raghu @ stanford.edu) + 2. Fixes to CLI driver (Jeremy Huylebroeck) + 3. Web interface... = Roadmap/call to add more features = The following is the list of useful features that are on the Hive Roadmap:
