Hi Folks I've had a look in the various build scripts and in the manifest of the jar itself but I am unable to identify which version of thrift is stored in thrift.jar. I can't see any references to a maven repository where it is pulled down either. Can someone tell me which version of thrift this is and where the jar was built and downloaded from ?
Regards Steve Watt From: amit jaiswal <[email protected]> To: [email protected] Date: 08/02/2010 01:46 AM Subject: Re: How to mount/proxy a db table in hive The original data is stored in database, and there is no need to create a separate copy of the database in HDFS for every job. Extending the notion of database, the data can be stored in any storage. One way of abstracting out things would to be implement a InputFormat that knows how to read the data, and provide the correct InputSplit and RecordReader implementation. The custom input format that I had mentioned works fine in a pure hadoop job. Is it possible to leverage the input format support in hive table creation to make such queries. Just 'select * from <table>' API support will also be sufficient as the actual sql query can be part of the InputFormat implementation. -amit From: Sonal Goyal <[email protected]> To: [email protected] Sent: Mon, 2 August, 2010 12:03:32 PM Subject: Re: How to mount/proxy a db table in hive Hi Amit, Hive needs data to be stored in its own namespace. Can you please explain why you want to call the database through Hive ? Thanks and Regards, Sonal www.meghsoft.com http://in.linkedin.com/in/sonalgoyal On Mon, Aug 2, 2010 at 11:56 AM, amit jaiswal <[email protected]> wrote: Hi, I have a database and am looking for a way to 'mount' the db table in hive in such a way that the select query in hive gets translated to sql query for database. I saw DBInputFormat and sqoop, but nothing that can create a proxy table in hive which internally makes db calls. I also tried to use custom variant of DBInputFormat as the input format for the database table. create table employee (id int, name string) stored as INPUTFORMAT 'mycustominputformat' OUTPUTFORMAT 'org.apache.hadoop.mapred.SequenceFileOutputFormat'; select id from employee; This fails while running hadoop job because HiveInputFormat only supports FileSplits. HiveInputFormat: public long getStart() { if (inputSplit instanceof FileSplit) { return ((FileSplit)inputSplit).getStart(); } return 0; } Any suggestions as if there are any InputFormat implementation that can be used? -amit
