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Posted to notifications@shardingsphere.apache.org by GitBox <gi...@apache.org> on 2020/08/28 09:52:17 UTC
[GitHub] [shardingsphere] mark4z opened a new issue #7129: left join can not be routed
mark4z opened a new issue #7129:
URL: https://github.com/apache/shardingsphere/issues/7129
## Bug Report
when i want do like this:
select ...
from A left join B on a.id = b.id and b.`key` = ?
where ...
B has been sharding and the key is `key`
A has more rows than B，so if i use left join, i should put the predicates on `on` rather than `where`. but i got a error which said
me have not Sharding Key.
### Which version of ShardingSphere did you use?
4.0.1
### Which project did you use? ShardingSphere-JDBC or ShardingSphere-Proxy?
ShardingSphere-JDBC
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[GitHub] [shardingsphere] jingshanglu commented on issue #7129: Sharding key in ON-Clause(Not Where-Clause) cause a error "No Sharding Key"
Posted by GitBox <gi...@apache.org>.
jingshanglu commented on issue #7129:
URL: https://github.com/apache/shardingsphere/issues/7129#issuecomment-693216422
> > @mark4z Can you show more stack info?
>
> Sorry, I can't resume it now. but actually it doesn't work.
>
> like this:
>
> Actual SQL: ds0 ::: select count(1) from forward left join back0 on back0.id = forward.id and back0.price = 100 where forward.id = 1
> Actual SQL: ds0 ::: select count(1) from forward left join back1 on back1.id = forward.id and back1.price = 100 where forward.id = 1
>
> ‘back’ is a table which has been sharing and the key is 'price'.
@mark4z `forward` is a actualTable? can you give the correct rewrited sql for this sql?
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[GitHub] [shardingsphere] mark4z commented on issue #7129: Sharding key in ON-Clause(Not Where-Clause) cause a error "No Sharding Key"
Posted by GitBox <gi...@apache.org>.
mark4z commented on issue #7129:
URL: https://github.com/apache/shardingsphere/issues/7129#issuecomment-693222622
> @mark4z You can try the master branch, the rewriting has been greatly improved on master branch.
Thks，if i have time, i'll dothing for this project.
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[GitHub] [shardingsphere] jingshanglu commented on issue #7129: Sharding key in ON-Clause(Not Where-Clause) cause a error "No Sharding Key"
Posted by GitBox <gi...@apache.org>.
jingshanglu commented on issue #7129:
URL: https://github.com/apache/shardingsphere/issues/7129#issuecomment-689456341
@mark4z Can you show more stack info?
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[GitHub] [shardingsphere] mark4z commented on issue #7129: Sharding key in ON-Clause(Not Where-Clause) cause a error "No Sharding Key"
Posted by GitBox <gi...@apache.org>.
mark4z commented on issue #7129:
URL: https://github.com/apache/shardingsphere/issues/7129#issuecomment-691073385
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[GitHub] [shardingsphere] mark4z edited a comment on issue #7129: Sharding key in ON-Clause(Not Where-Clause) cause a error "No Sharding Key"
Posted by GitBox <gi...@apache.org>.
mark4z edited a comment on issue #7129:
URL: https://github.com/apache/shardingsphere/issues/7129#issuecomment-682474487
> you can try:
>
> ```
> select ...
> from A left join B on a.id = b.id
> where b.key = ? ...
> ```
You know, it equals inner join
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[GitHub] [shardingsphere] kimmking closed issue #7129: Sharding key in ON-Clause(Not Where-Clause) cause a error "No Sharding Key"
Posted by GitBox <gi...@apache.org>.
kimmking closed issue #7129:
URL: https://github.com/apache/shardingsphere/issues/7129
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[GitHub] [shardingsphere] mark4z commented on issue #7129: Sharding key in ON-Clause(Not Where-Clause) cause a error "No Sharding Key"
Posted by GitBox <gi...@apache.org>.
mark4z commented on issue #7129:
URL: https://github.com/apache/shardingsphere/issues/7129#issuecomment-691073385
> @mark4z Can you show more stack info?
Sorry, I can't resume it now. but actually it doesn't work.
like this:
Actual SQL: ds0 ::: select count(1) from forward left join back0 on back0.id = forward.id and back0.price = 100 where forward.id = 1
Actual SQL: ds0 ::: select count(1) from forward left join back1 on back1.id = forward.id and back1.price = 100 where forward.id = 1
‘back’ is a table which has been sharing and the key is 'price'.
----------------------------------------------------------------
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[GitHub] [shardingsphere] mark4z commented on issue #7129: Sharding key in ON-Clause(Not Where-Clause) cause a error "No Sharding Key"
Posted by GitBox <gi...@apache.org>.
mark4z commented on issue #7129:
URL: https://github.com/apache/shardingsphere/issues/7129#issuecomment-682474487
> you can try:
>
> ```
> select ...
> from A left join B on a.id = b.id
> where b.key = ? ...
> ```
You know, left join in ON-Clause equals inner join
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[GitHub] [shardingsphere] mark4z edited a comment on issue #7129: Sharding key in ON-Clause(Not Where-Clause) cause a error "No Sharding Key"
Posted by GitBox <gi...@apache.org>.
mark4z edited a comment on issue #7129:
URL: https://github.com/apache/shardingsphere/issues/7129#issuecomment-693222622
> @mark4z You can try the master branch, the rewriting has been greatly improved on master branch.
Thks，if i have time, i'll do sth for this project.
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[GitHub] [shardingsphere] jingshanglu commented on issue #7129: Sharding key in ON-Clause(Not Where-Clause) cause a error "No Sharding Key"
Posted by GitBox <gi...@apache.org>.
jingshanglu commented on issue #7129:
URL: https://github.com/apache/shardingsphere/issues/7129#issuecomment-693217968
@mark4z You can try the master branch, the rewriting has been greatly improved on master branch.
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[GitHub] [shardingsphere] mark4z commented on issue #7129: Sharding key in ON-Clause(Not Where-Clause) cause a error "No Sharding Key"
Posted by GitBox <gi...@apache.org>.
mark4z commented on issue #7129:
URL: https://github.com/apache/shardingsphere/issues/7129#issuecomment-686237893
> you can try:
>
> ```
> select ...
> from A left join B on a.id = b.id
> where b.key = ? ...
> ```
So, sharding not supported this.
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[GitHub] [shardingsphere] kimmking commented on issue #7129: left join can not be routed
Posted by GitBox <gi...@apache.org>.
kimmking commented on issue #7129:
URL: https://github.com/apache/shardingsphere/issues/7129#issuecomment-682460781
you can try:
```
select ...
from A left join B on a.id = b.id
where b.key = ? ...
```
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[GitHub] [shardingsphere] kimmking commented on issue #7129: Sharding key in ON-Clause(Not Where-Clause) cause a error "No Sharding Key"
Posted by GitBox <gi...@apache.org>.
kimmking commented on issue #7129:
URL: https://github.com/apache/shardingsphere/issues/7129#issuecomment-719445660
As this issue have no more infomation for a long time, we close it now.
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[GitHub] [shardingsphere] mark4z edited a comment on issue #7129: Sharding key in ON-Clause(Not Where-Clause) cause a error "No Sharding Key"
Posted by GitBox <gi...@apache.org>.
mark4z edited a comment on issue #7129:
URL: https://github.com/apache/shardingsphere/issues/7129#issuecomment-682474487
> you can try:
>
> ```
> select ...
> from A left join B on a.id = b.id
> where b.key = ? ...
> ```
You know, left join in Where-Clause equals inner join
----------------------------------------------------------------
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[GitHub] [shardingsphere] mark4z commented on issue #7129: Sharding key in ON-Clause(Not Where-Clause) cause a error "No Sharding Key"
Posted by GitBox <gi...@apache.org>.
mark4z commented on issue #7129:
URL: https://github.com/apache/shardingsphere/issues/7129#issuecomment-691073385
> @mark4z Can you show more stack info?
Sorry, I can't resume it now. but actually it doesn't work.
like this:
Actual SQL: ds0 ::: select count(1) from forward left join back0 on back0.id = forward.id and back0.price = 100 where forward.id = 1
Actual SQL: ds0 ::: select count(1) from forward left join back1 on back1.id = forward.id and back1.price = 100 where forward.id = 1
‘back’ is a table which has been sharing and the key is 'price'.
----------------------------------------------------------------
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[GitHub] [shardingsphere] mark4z commented on issue #7129: Sharding key in ON-Clause(Not Where-Clause) cause a error "No Sharding Key"
Posted by GitBox <gi...@apache.org>.
mark4z commented on issue #7129:
URL: https://github.com/apache/shardingsphere/issues/7129#issuecomment-691073385
> @mark4z Can you show more stack info?
Sorry, I can't resume it now. but actually it doesn't work.
like this:
Actual SQL: ds0 ::: select count(1) from forward left join back0 on back0.id = forward.id and back0.price = 100 where forward.id = 1
Actual SQL: ds0 ::: select count(1) from forward left join back1 on back1.id = forward.id and back1.price = 100 where forward.id = 1
‘back’ is a table which has been sharing and the key is 'price'.
----------------------------------------------------------------
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