exposure meter: 
 cid (user id) 
 newsid (exposure News) 
 Click list: 
 cid (user id) 
 newsid (Click News) 
 want to check whether each news article has been clicked in the following form: 
 cid newsid cid newsid 
 01 23456 01 23456 
 01 23457 null null 
 HIVE SQL: 
 select * from expose a LEFT OUTER JOIN click b ON (a.cid=b.cid and a.newsid=b.newsid) where a.p_date > = "2018040801" and b.p_date > = "2018040801" and
 is there any error in the sentence 
 and what to do if I always report 
 No partition predicate found for Alias and OOM errors? 
