Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Welcome To Ask or Share your Answers For Others

Categories

0 votes
624 views
in Technique[技术] by (71.8m points)

join - Error in Hive Query while joining tables

I am unable to pass the equality check using the below HIVE query.

I have 3 table and i want to join these table. I trying as below, but get error :

FAILED: Error in semantic analysis: Line 3:40 Both left and right aliases encountered in JOIN 'visit_date'

select t1.*, t99.* from table1 t1 JOIN 
    (select v3.*, t3.* from table2 v3 JOIN table3 t3 ON
    ( v3.AS_upc= t3.upc_no AND v3.start_dt <= t3.visit_date  AND v3.end_dt >= t3.visit_date AND v3.adv_price <= t3.comp_price ) ) t99 ON
    (t1.comp_store_id = t99.cpnumber AND t1.AS_store_nbr = t99.store_no);

EDITED based on help from FuzzyTree:

1st:

We tried to edit above query using between and where clause, but not getting any output from the query.

But If we changed the above query by removing the between clause with date, then I got some output based on "v3.adv_price <= t3.comp_price", but not using "date filter".

select t1.*, t99.* from table1 t1 JOIN
    (select v3.*, t3.* from table2 v3 JOIN table3 t3 on (v3.AS_upc= t3.upc_no) 
        where v3.adv_price <= t3.comp_price
    ) t99 ON
    (t1.comp_store_id = t99.cpnumber AND t1.AS_store_nbr = t99.store_no);

2nd :

Next we tried to pass only one date as :

select t1.*, t99.* from table1 t1 JOIN
        (select v3.*, t3.* from table2 v3 JOIN table3 t3 on (v3.AS_upc= t3.upc_no) 
            where v3.adv_price <= t3.comp_price and v3.start_dt <= t3.visit_date
        ) t99 ON
        (t1.comp_store_id = t99.cpnumber AND t1.AS_store_nbr = t99.store_no);

So, now it's showing some result but if we pass both the start and end date filter, it; not showing any result.

See Question&Answers more detail:os

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
Welcome To Ask or Share your Answers For Others

1 Reply

0 votes
by (71.8m points)

https://cwiki.apache.org/confluence/display/Hive/LanguageManual+Joins

Only equality joins, outer joins, and left semi joins are supported in Hive. Hive does not support join conditions that are not equality conditions as it is very difficult to express such conditions as a map/reduce job.

Try moving your inequalities to the where clause

select t1.*, t99.* from table1 t1 JOIN
    (select v3.*, t3.* from table2 v3 JOIN table3 t3 on (v3.AS_upc= t3.upc_no) 
        where t3.visit_date between v3.start_dt and v3.end_dt
        and v3.adv_price <= t3.comp_price
    ) t99 ON
    (t1.comp_store_id = t99.cpnumber AND t1.AS_store_nbr = t99.store_no);

与恶龙缠斗过久,自身亦成为恶龙;凝视深渊过久,深渊将回以凝视…
OGeek|极客中国-欢迎来到极客的世界,一个免费开放的程序员编程交流平台!开放,进步,分享!让技术改变生活,让极客改变未来! Welcome to OGeek Q&A Community for programmer and developer-Open, Learning and Share
Click Here to Ask a Question

...