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From Ablimit Aji <abli...@gmail.com>
Subject Problem with indexing in Hive
Date Thu, 26 Jul 2012 17:18:13 GMT
I have written a custom index handler and wanted to test it. However hive
is not using it.
So I test with simple table (pokes (int foo, string bar)) which comes with
hive distribution for testing purpose.
Then I created a compact index and set the set
hive.optimize.index.filter=true;
However, upon checking the log info, it seems hive is still not using the
index.
So, what is the problem ?
The query I issued is as follow:  select foo from pokes WHERE foo=498 ;

Below is the log info I got after issuing the query.

12/07/26 12:25:17 INFO index.IndexWhereProcessor: Processing predicate for
index optimization
12/07/26 12:25:17 INFO index.IndexWhereProcessor: (foo = 498)
12/07/26 12:25:17 INFO metastore.HiveMetaStore: 0: get_table : db=default
tbl=pokes_idx
12/07/26 12:25:17 INFO hive.log: DDL: struct pokes_idx { i32 foo, string
_bucketname, list _offsets}
12/07/26 12:25:17 INFO index.IndexWhereProcessor: checking index
staleness...
12/07/26 12:25:17 INFO index.IndexWhereProcessor: 1342465077455
12/07/26 12:25:17 INFO index.IndexWhereProcessor: 1342465077455
12/07/26 12:25:17 INFO util.NativeCodeLoader: Loaded the native-hadoop
library
12/07/26 12:25:17 WARN snappy.LoadSnappy: Snappy native library not loaded

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