TeslaCN opened a new issue, #18738: URL: https://github.com/apache/shardingsphere/issues/18738
## Refactor ### Which version of ShardingSphere did you use? 5.1.2 ### Which project did you use? ShardingSphere-JDBC or ShardingSphere-Proxy? ShardingSphere-Proxy ### Actual behavior If we execute SQL (SET statement) like the following, `BroadcastDatabaseBackendHandler` will execute SQL in all data sources of all logic databases (schemas). ```sql set sql_mode = '' ``` Why shouldn't Proxy broadcast SQL to all logic data sources? - It is expensive if there are too many data sources. - PostgreSQL's connection is created with fixed database, which cannot be changed on the fly. - If the SET statement worked in session scope, the connections used to execute the SQL will be returned to data sources, which pollutes connections in data sources. This issue cannot cure this problem, but may reduce the impact of pollution. -- 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]
