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From Apache Wiki <wikidi...@apache.org>
Subject [Hadoop Wiki] Update of "Hive/Roadmap" by JeffHammerbacher
Date Thu, 30 Oct 2008 06:42:26 GMT
Dear Wiki user,

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The following page has been changed by JeffHammerbacher:

  #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
+ 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:

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