PREHOOK: query: SELECT explode(col) AS myCol FROM 
    (SELECT array(1,2,3) AS col FROM src LIMIT 1 
     UNION ALL
     SELECT IF(false, array(1,2,3), NULL) AS col FROM src LIMIT 1) a
PREHOOK: type: QUERY
PREHOOK: Input: default@src
PREHOOK: Output: file:/data/users/pyang/task2/trunk/VENDOR.hive/trunk/build/ql/scratchdir/hive_2010-04-08_15-57-57_440_1997210643218047348/10000
POSTHOOK: query: SELECT explode(col) AS myCol FROM 
    (SELECT array(1,2,3) AS col FROM src LIMIT 1 
     UNION ALL
     SELECT IF(false, array(1,2,3), NULL) AS col FROM src LIMIT 1) a
POSTHOOK: type: QUERY
POSTHOOK: Input: default@src
POSTHOOK: Output: file:/data/users/pyang/task2/trunk/VENDOR.hive/trunk/build/ql/scratchdir/hive_2010-04-08_15-57-57_440_1997210643218047348/10000
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