ql/src/test/queries/clientpositive/mapjoin_hook.q

--! qt:dataset:srcpart
--! qt:dataset:src1
--! qt:dataset:src
set hive.stats.column.autogather=false;
set hive.exec.post.hooks = org.apache.hadoop.hive.ql.hooks.MapJoinCounterHook,org.apache.hadoop.hive.ql.hooks.PrintCompletedTasksHook;

drop table dest1_n171;
CREATE TABLE dest1_n171(key INT, value STRING) STORED AS TEXTFILE;

set hive.auto.convert.join = true;

INSERT OVERWRITE TABLE dest1_n171 
SELECT /*+ MAPJOIN(x) */ x.key, count(1) FROM src1 x JOIN src y ON (x.key = y.key) group by x.key;


FROM src src1 JOIN src src2 ON (src1.key = src2.key) JOIN src src3 ON (src1.key = src3.key)
INSERT OVERWRITE TABLE dest1_n171 SELECT src1.key, src3.value;


set hive.mapjoin.localtask.max.memory.usage = 0.0001;
set hive.mapjoin.check.memory.rows = 2;
set hive.auto.convert.join.noconditionaltask = false;


FROM srcpart src1 JOIN src src2 ON (src1.key = src2.key)
INSERT OVERWRITE TABLE dest1_n171 SELECT src1.key, src2.value 
where (src1.ds = '2008-04-08' or src1.ds = '2008-04-09' )and (src1.hr = '12' or src1.hr = '11');


FROM src src1 JOIN src src2 ON (src1.key = src2.key) JOIN src src3 ON (src1.key + src2.key = src3.key)
INSERT OVERWRITE TABLE dest1_n171 SELECT src1.key, src3.value;