information_schema and sys relevant SQLs can't parse or route

[tuohai666]

Bug Report

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Which version of ShardingSphere did you use?

5.0.0-RC1-SNAPSHOT

Which project did you use? ShardingSphere-JDBC or ShardingSphere-Proxy?

ShardingSphere-Proxy

Expected behavior

Get the result from the following SQLs:

show full processlist;
select * from information_schema.processlist ;
select * from information_schema.INNODB_TRX;
select * from sys.schema_redundant_indexes;

Actual behavior

mysql> show full processlist;
Query OK, 0 rows affected (0.06 sec)

Exception in log: 
line 1:10 no viable alternative at input 'showfullprocesslist'

mysql> select * from information_schema.processlist;
ERROR 10002 (C1000): 2Unknown exception: [Can not route tables for `[processlist]`, please make sure the tables are in same schema.]

Exception in log:
[ERROR] 18:09:12.379 [ShardingSphere-Command-5] o.a.s.p.f.c.CommandExecutorTask - Exception occur: 
org.apache.shardingsphere.infra.exception.ShardingSphereException: Can not route tables for `[processlist]`, please make sure the tables are in same schema.
	at org.apache.shardingsphere.sharding.route.engine.type.unconfigured.ShardingUnconfiguredTablesRoutingEngine.route(ShardingUnconfiguredTablesRoutingEngine.java:50)
	at org.apache.shardingsphere.sharding.route.engine.ShardingRouteDecorator.decorate(ShardingRouteDecorator.java:72)
	at org.apache.shardingsphere.sharding.route.engine.ShardingRouteDecorator.decorate(ShardingRouteDecorator.java:55)
	at org.apache.shardingsphere.infra.route.DataNodeRouter.executeRoute(DataNodeRouter.java:89)
	at org.apache.shardingsphere.infra.route.DataNodeRouter.route(DataNodeRouter.java:74)
	at org.apache.shardingsphere.proxy.backend.communication.jdbc.wrapper.StatementExecutorWrapper.execute(StatementExecutorWrapper.java:67)
	at org.apache.shardingsphere.proxy.backend.communication.jdbc.execute.engine.jdbc.JDBCExecuteEngine.execute(JDBCExecuteEngine.java:80)
	at org.apache.shardingsphere.proxy.backend.communication.jdbc.JDBCDatabaseCommunicationEngine.execute(JDBCDatabaseCommunicationEngine.java:85)
	at org.apache.shardingsphere.proxy.backend.text.query.QueryBackendHandler.execute(QueryBackendHandler.java:55)
	at org.apache.shardingsphere.proxy.frontend.mysql.command.query.text.query.MySQLComQueryPacketExecutor.execute(MySQLComQueryPacketExecutor.java:78)
	at org.apache.shardingsphere.proxy.frontend.command.CommandExecutorTask.executeCommand(CommandExecutorTask.java:105)
	at org.apache.shardingsphere.proxy.frontend.command.CommandExecutorTask.run(CommandExecutorTask.java:80)
	at java.util.concurrent.ThreadPoolExecutor.runWorker(ThreadPoolExecutor.java:1149)
	at java.util.concurrent.ThreadPoolExecutor$Worker.run(ThreadPoolExecutor.java:624)
	at java.lang.Thread.run(Thread.java:748)

Reason analyze (If you can)

Parse error:
show full processlist;

Route error:
select * from information_schema.processlist;

Steps to reproduce the behavior, such as: SQL to execute, sharding rule configuration, when exception occur etc.

Execute these SQLs straightforwardly.

Example codes for reproduce this issue (such as a github link).

[sandynz]

Hibernate 5.4 + ShardingSphere JDBC 5.0.0-RC1-SNAPSHOT + PostgreSQL 12, has similar exception: ShardingSphereException: Can not route tables for [sequences], please make sure the tables are in same schema.

Hibernate settings:

• hibernate.hbm2ddl.auto = update

SQL executed by hibernate automatically: select * from information_schema.sequences

[tuohai666]

The exception caused by parse and route procedure. @tristaZero , can you have a look?

[kimmking]

any update?

[mark4z]

Mysql has same problem here.

[tristaZero]

Hi thanks for your attention.
It is an important but challenging feature definitely. We need to make a schedule to support it step by step. Once there is any plan, I will update it here.

[linchers]

org.apache.shardingsphere.sharding.route.engine.type.unconfigured.ShardingUnconfiguredTablesRoutingEngine#findDataSourceName
private Optional<String> findDataSourceName() { for (Entry<String, Collection<String>> entry : unconfiguredSchemaMetaDataMap.entrySet()) { if (entry.getValue().containsAll(logicTables)) { return Optional.of(entry.getKey()); } } return Optional.empty(); }

entry.getValue() tablenames is upcase but logicTables is lowercase

[leeey111]

Any news?
Without this feature support,it is inconvenienced to use "SQL complement" in some SQL clients like DBeaver.

[lcxywfe]

Any news? phpmyadmin also need information_schema.

[github-actions]

Hello , this issue has not received a reply for several days.
This issue is supposed to be closed.

[github-actions]

There hasn't been any activity on this issue recently, and in order to prioritize active issues, it will be marked as stale.

[terrymanu]

Close because of staled.