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https://issues.apache.org/jira/browse/KYLIN-4166?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=16955808#comment-16955808
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ASF GitHub Bot commented on KYLIN-4166:
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zhangayqian commented on pull request #895: KYLIN-4166 Case when return null
when SQL no GROUP BY
URL: https://github.com/apache/kylin/pull/895
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> kylin parse sql error
> ---------------------
>
> Key: KYLIN-4166
> URL: https://issues.apache.org/jira/browse/KYLIN-4166
> Project: Kylin
> Issue Type: Bug
> Components: Query Engine
> Affects Versions: v3.0.0-alpha2
> Reporter: phil.zhang
> Assignee: Yaqian Zhang
> Priority: Critical
> Attachments: 1.png, 2.png, 3.png, 4.png,
> image-2019-09-20-15-22-15-356.png, image-2019-09-20-15-23-29-881.png
>
>
>
> 1. I use tableau on kylin, tableau has generate a sql :
> '''
> SELECT "X___SQL___"."FLIGHT_TYPE" AS "FLIGHT_TYPE",
> SUM("X___SQL___"."SHOPPING_SUCCESS_COUNT") AS "sum_SHOPPING_SUCCESS_COUNT_ok"
> FROM ( select *, case when cast(DURATION_LEVEL as varchar) like '1' then
> '>=0s,<3s' when cast(DURATION_LEVEL as varchar) like '2' then '>=3s,<4s' when
> cast(DURATION_LEVEL as varchar) like '3' then '>=4s,<5s' when
> cast(DURATION_LEVEL as varchar) like '4' then '>=5s,<6s' when
> cast(DURATION_LEVEL as varchar) like '5' then '>=6s,<7s' when
> cast(DURATION_LEVEL as varchar) like '6' then '>=7s,<8s' when
> cast(DURATION_LEVEL as varchar) like '7' then '>=8s,<9s' when
> cast(DURATION_LEVEL as varchar) like '8' then '>=9s,<10s' when
> cast(DURATION_LEVEL as varchar) like '9' then '>=10s,<12s' when
> cast(DURATION_LEVEL as varchar) like '10' then '>=12s,<14s' when
> cast(DURATION_LEVEL as varchar) like '11' then '>=14s,<16s' when
> cast(DURATION_LEVEL as varchar) like '12' then '>=16s,<18s' when
> cast(DURATION_LEVEL as varchar) like '13' then '>=18s,<20s' when
> cast(DURATION_LEVEL as varchar) like '14' then '>=20s,<30s' when
> cast(DURATION_LEVEL as varchar) like '15' then '>=30s,<40s' when
> cast(DURATION_LEVEL as varchar) like '16' then '>=40s,<50s' when
> cast(DURATION_LEVEL as varchar) like '17' then '>=50s' else 'null' end as
> DURATION_LEVEL_TRANS from DM_AIR_API_DURATION_SPB_D ) "X___SQL___" WHERE
> ("X___SQL___"."DURATION_LEVEL_TRANS" = '>=5s,<6s') GROUP BY 1
> '''
> it seems that the sql is correct, but the result is unexpect, it returns
> null .
> !image-2019-09-20-15-22-15-356.png!
> But actually, it should returns some rows because there exist data fit the
> query, let's change the sql form to check it.
> '''
> SELECT "FLIGHT_TYPE" AS "FLIGHT_TYPE", SUM("SHOPPING_SUCCESS_COUNT") AS
> "sum_SHOPPING_SUCCESS_COUNT_ok" from DM_AIR_API_DURATION_SPB_D WHERE
> ("DURATION_LEVEL" = 4 and "DAY_NUM"='2019-09-10') GROUP BY 1
> '''
> !image-2019-09-20-15-23-29-881.png!
>
> 2. and when i write sql like this
> '''
> SELECT flight_type,SUM("SHOPPING_SUCCESS_COUNT") AS
> "sum_SHOPPING_SUCCESS_COUNT_ok" from DM_AIR_API_DURATION_SPB_D group by
> flight_type
> '''
> i got result {color:#333333}like this{color}
> {color:#333333}!http://mail.163.com/js6/s?func=mbox:getMessageData&mid=270:xtbBDhAtQVrbEIH+vQAAsh&part=5!{color}
> it is same to the result of
> '''
> SELECT "X___SQL___"."FLIGHT_TYPE" AS "FLIGHT_TYPE",
> SUM("X___SQL___"."SHOPPING_SUCCESS_COUNT") AS "sum_SHOPPING_SUCCESS_COUNT_ok"
> FROM ( select *, case when cast(DURATION_LEVEL as varchar)
> like '1' then *'>=0s,<3s'* when cast(DURATION_LEVEL as varchar) like
> '2' then '>=3s,<4s' when cast(DURATION_LEVEL as varchar) like '3'
> then '>=4s,<5s' when cast(DURATION_LEVEL as varchar) like '4' then
> '>=5s,<6s' when cast(DURATION_LEVEL as varchar) like '5' then
> '>=6s,<7s' when cast(DURATION_LEVEL as varchar) like '6' then
> '>=7s,<8s' when cast(DURATION_LEVEL as varchar) like '7' then
> '>=8s,<9s' when cast(DURATION_LEVEL as varchar) like '8' then
> '>=9s,<10s' when cast(DURATION_LEVEL as varchar) like '9' then
> '>=10s,<12s' when cast(DURATION_LEVEL as varchar) like '10' then
> '>=12s,<14s' when cast(DURATION_LEVEL as varchar) like '11' then
> '>=14s,<16s' when cast(DURATION_LEVEL as varchar) like '12' then
> '>=16s,<18s' when cast(DURATION_LEVEL as varchar) like '13' then
> '>=18s,<20s' when cast(DURATION_LEVEL as varchar) like '14' then
> '>=20s,<30s' when cast(DURATION_LEVEL as varchar) like '15' then
> '>=30s,<40s' when cast(DURATION_LEVEL as varchar) like '16' then
> '>=40s,<50s' when cast(DURATION_LEVEL as varchar) like '17' then
> '>=50s' else 'null' end as DURATION_LEVEL_TRANS from
> DM_AIR_API_DURATION_SPB_D ) "X___SQL___" WHERE
> ("X___SQL___"."DURATION_LEVEL_TRANS" = *'>=0s,<3s'*) GROUP BY 1
> '''
> !http://mail.163.com/js6/s?func=mbox:getMessageData&mid=270:xtbBDhAtQVrbEIH+vQAAsh&part=6!
>
>
> {quote} *I guess maybe there are some bugs about parsing sql like upper ? I
> hope someone can help me to deal this problem.*
> {quote}
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