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From "Zhong Yanghong (JIRA)" <j...@apache.org>
Subject [jira] [Commented] (KYLIN-3803) query result not correct when lookup table is joined twice
Date Fri, 01 Feb 2019 08:26:00 GMT

    [ https://issues.apache.org/jira/browse/KYLIN-3803?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16758085#comment-16758085
] 

Zhong Yanghong commented on KYLIN-3803:
---------------------------------------

Should add column aliases. Otherwise, result of the second one will be overrode by the first
one. 
{code}
select SELLER_COUNTRY.NAME as SELLER_COUNTRY_NAME, BUYER_COUNTRY.NAME as BUYER_COUNTRY_NAME,
sum(PRICE)
{code}
{code}
FROM TEST_KYLIN_FACT
LEFT JOIN TEST_ORDER as TEST_ORDER
ON TEST_KYLIN_FACT.ORDER_ID = TEST_ORDER.ORDER_ID
LEFT JOIN EDW.TEST_CAL_DT as TEST_CAL_DT
ON TEST_KYLIN_FACT.CAL_DT = TEST_CAL_DT.CAL_DT
LEFT JOIN TEST_CATEGORY_GROUPINGS
ON TEST_KYLIN_FACT.LEAF_CATEG_ID = TEST_CATEGORY_GROUPINGS.LEAF_CATEG_ID AND TEST_KYLIN_FACT.LSTG_SITE_ID
= TEST_CATEGORY_GROUPINGS.SITE_ID
LEFT JOIN EDW.TEST_SITES as TEST_SITES
ON TEST_KYLIN_FACT.LSTG_SITE_ID = TEST_SITES.SITE_ID
LEFT JOIN EDW.TEST_SELLER_TYPE_DIM as TEST_SELLER_TYPE_DIM
ON TEST_KYLIN_FACT.SLR_SEGMENT_CD = TEST_SELLER_TYPE_DIM.SELLER_TYPE_CD
LEFT JOIN TEST_ACCOUNT as SELLER_ACCOUNT
ON TEST_KYLIN_FACT.SELLER_ID = SELLER_ACCOUNT.ACCOUNT_ID
LEFT JOIN TEST_ACCOUNT as BUYER_ACCOUNT
ON TEST_ORDER.BUYER_ID = BUYER_ACCOUNT.ACCOUNT_ID
LEFT JOIN TEST_COUNTRY as SELLER_COUNTRY
ON SELLER_ACCOUNT.ACCOUNT_COUNTRY = SELLER_COUNTRY.COUNTRY
LEFT JOIN TEST_COUNTRY as BUYER_COUNTRY
ON BUYER_ACCOUNT.ACCOUNT_COUNTRY = BUYER_COUNTRY.COUNTRY
group by SELLER_COUNTRY.NAME, BUYER_COUNTRY.NAME
order by SELLER_COUNTRY.NAME, BUYER_COUNTRY.NAME
{code}

> query result not correct when lookup table is joined twice
> ----------------------------------------------------------
>
>                 Key: KYLIN-3803
>                 URL: https://issues.apache.org/jira/browse/KYLIN-3803
>             Project: Kylin
>          Issue Type: Bug
>          Components: Query Engine
>            Reporter: Zhong Yanghong
>            Priority: Major
>
> {code}
> select SELLER_COUNTRY.NAME, BUYER_COUNTRY.NAME, sum(PRICE)
> FROM TEST_KYLIN_FACT
> LEFT JOIN TEST_ORDER as TEST_ORDER
> ON TEST_KYLIN_FACT.ORDER_ID = TEST_ORDER.ORDER_ID
> LEFT JOIN EDW.TEST_CAL_DT as TEST_CAL_DT
> ON TEST_KYLIN_FACT.CAL_DT = TEST_CAL_DT.CAL_DT
> LEFT JOIN TEST_CATEGORY_GROUPINGS
> ON TEST_KYLIN_FACT.LEAF_CATEG_ID = TEST_CATEGORY_GROUPINGS.LEAF_CATEG_ID AND TEST_KYLIN_FACT.LSTG_SITE_ID
= TEST_CATEGORY_GROUPINGS.SITE_ID
> LEFT JOIN EDW.TEST_SITES as TEST_SITES
> ON TEST_KYLIN_FACT.LSTG_SITE_ID = TEST_SITES.SITE_ID
> LEFT JOIN EDW.TEST_SELLER_TYPE_DIM as TEST_SELLER_TYPE_DIM
> ON TEST_KYLIN_FACT.SLR_SEGMENT_CD = TEST_SELLER_TYPE_DIM.SELLER_TYPE_CD
> LEFT JOIN TEST_ACCOUNT as SELLER_ACCOUNT
> ON TEST_KYLIN_FACT.SELLER_ID = SELLER_ACCOUNT.ACCOUNT_ID
> LEFT JOIN TEST_ACCOUNT as BUYER_ACCOUNT
> ON TEST_ORDER.BUYER_ID = BUYER_ACCOUNT.ACCOUNT_ID
> LEFT JOIN TEST_COUNTRY as SELLER_COUNTRY
> ON SELLER_ACCOUNT.ACCOUNT_COUNTRY = SELLER_COUNTRY.COUNTRY
> LEFT JOIN TEST_COUNTRY as BUYER_COUNTRY
> ON BUYER_ACCOUNT.ACCOUNT_COUNTRY = BUYER_COUNTRY.COUNTRY
> group by SELLER_COUNTRY.NAME, BUYER_COUNTRY.NAME
> order by SELLER_COUNTRY.NAME, BUYER_COUNTRY.NAME
> {code}



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