CREATE TABLE dest1(key INT, value STRING) STORED AS TEXTFILE;

-- both input pruning and sample filter
EXPLAIN EXTENDED
INSERT OVERWRITE TABLE dest1 SELECT s.* 
FROM srcbucket TABLESAMPLE (BUCKET 1 OUT OF 4 on key) s;

INSERT OVERWRITE TABLE dest1 SELECT s.* 
FROM srcbucket TABLESAMPLE (BUCKET 1 OUT OF 4 on key) s;

SELECT dest1.* FROM dest1;