liugddx commented on issue #2861: URL: https://github.com/apache/incubator-seatunnel/issues/2861#issuecomment-1331666434
> > > https://shardingsphere.apache.org/document/current/en/dev-manual/sharding/ > > > > > > Regarding the jdbc data source, most of the primary keys may be data such as uuid. We can't just be restricted to numeric types,hash mode is a better sharding method, of course we can provide more sharding methods. > > Hash maybe have some problem in single database, the each split read data may discontinuous, the preformance not good. And how to use sql to describe it also is a problem. SQL needs to be in the dialect and needs to be tested and optimized for performance. ``` select * from test where id mod 2=1 ``` -- This is an automated message from the Apache Git Service. To respond to the message, please log on to GitHub and use the URL above to go to the specific comment. To unsubscribe, e-mail: [email protected] For queries about this service, please contact Infrastructure at: [email protected]
