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https://issues.apache.org/jira/browse/KYLIN-5328?page=com.atlassian.jira.plugin.system.issuetabpanels:all-tabpanel
]
pengfei.zhan updated KYLIN-5328:
--------------------------------
Description:
Setting `kylin.query.join-match-optimization-enabled=true`, we can use the left
join model to answer the inner join query statement. But it encounters a bug.
For example:
The model is as follows,
{code}
lineorder
inner join customer on lineorder.lo_custkey = customer.c_custkey
left join dates on lineorder.lo_orderdate = dates.d_datekey
{code}
The query statement is as follows can match this model,
{code}
select lineorder.lo_linenumber
from ssb.lineorder
inner join ssb.customer on lineorder.lo_custkey = customer.c_custkey
left join ssb.dates on lineorder.lo_orderdate = dates.d_datekey
{code}
However, the query statement is as follows cannot match this model,
{code}
select lineorder.lo_linenumber
from ssb.customer
inner join ssb.lineorder as lineorder on lineorder.lo_custkey =
customer.c_custkey
left join ssb.dates as dates on lineorder.lo_orderdate = dates.d_datekey
{code}
was:
Setting `kylin.query.join-match-optimization-enabled=true`, we can use the left
join model to answer the inner join query statement. But it encounters a bug.
For example:
The model is as follows,
{code}
lineorder
inner join customer on lineorder.lo_custkey = customer.c_custkey
left join dates on lineorder.lo_orderdate = dates.d_datekey
{code}
The query statement is as follows can match this model,
``` sql
select lineorder.lo_linenumber
from ssb.lineorder
inner join ssb.customer on lineorder.lo_custkey = customer.c_custkey
left join ssb.dates on lineorder.lo_orderdate = dates.d_datekey
```
However, the query statement is as follows cannot match this model,
```sql
select lineorder.lo_linenumber
from ssb.customer
inner join ssb.lineorder as lineorder on lineorder.lo_custkey =
customer.c_custkey
left join ssb.dates as dates on lineorder.lo_orderdate = dates.d_datekey
```
> Query match join error
> ----------------------
>
> Key: KYLIN-5328
> URL: https://issues.apache.org/jira/browse/KYLIN-5328
> Project: Kylin
> Issue Type: Bug
> Components: Query Engine
> Affects Versions: 5.0-alpha
> Reporter: pengfei.zhan
> Assignee: pengfei.zhan
> Priority: Major
> Fix For: 5.0-alpha
>
>
> Setting `kylin.query.join-match-optimization-enabled=true`, we can use the
> left join model to answer the inner join query statement. But it encounters a
> bug.
> For example:
> The model is as follows,
> {code}
> lineorder
> inner join customer on lineorder.lo_custkey = customer.c_custkey
> left join dates on lineorder.lo_orderdate = dates.d_datekey
> {code}
> The query statement is as follows can match this model,
> {code}
> select lineorder.lo_linenumber
> from ssb.lineorder
> inner join ssb.customer on lineorder.lo_custkey = customer.c_custkey
> left join ssb.dates on lineorder.lo_orderdate = dates.d_datekey
> {code}
> However, the query statement is as follows cannot match this model,
> {code}
> select lineorder.lo_linenumber
> from ssb.customer
> inner join ssb.lineorder as lineorder on lineorder.lo_custkey =
> customer.c_custkey
> left join ssb.dates as dates on lineorder.lo_orderdate = dates.d_datekey
> {code}
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