zjcnb opened a new issue, #19432:
URL: https://github.com/apache/shardingsphere/issues/19432
### Which version of ShardingSphere did you use?
master
### Which project did you use? ShardingSphere-JDBC or ShardingSphere-Proxy?
ShardingSphere-Proxy
### Expected behavior
Perceived change
### Actual behavior
Not perceived
### Reason analyze (If you can)
```
public static MetaDataContexts create(final MetaDataPersistService
persistService, final Map<String, DatabaseConfiguration> databaseConfigs,
final InstanceContext
instanceContext) throws SQLException {
Collection<String> databaseNames =
instanceContext.getInstance().getMetaData() instanceof JDBCInstanceMetaData
? databaseConfigs.keySet()
:
persistService.getDatabaseMetaDataService().loadAllDatabaseNames();
Map<String, DatabaseConfiguration> effectiveDatabaseConfigs =
createEffectiveDatabaseConfigurations(databaseNames, databaseConfigs,
persistService);
Collection<RuleConfiguration> globalRuleConfigs =
persistService.getGlobalRuleService().load();
ConfigurationProperties props = new
ConfigurationProperties(persistService.getPropsService().load());
Map<String, ShardingSphereDatabase> databases =
ShardingSphereDatabasesFactory.create(effectiveDatabaseConfigs, props,
instanceContext);
ShardingSphereRuleMetaData globalMetaData = new
ShardingSphereRuleMetaData(GlobalRulesBuilder.buildRules(globalRuleConfigs,
databases, instanceContext));
return new MetaDataContexts(persistService, new
ShardingSphereMetaData(databases, globalMetaData, props),
OptimizerContextFactory.create(databases, globalMetaData));
}
```
The database is reassigned, such as :
```
public ShardingSphereMetaData(final Map<String, ShardingSphereDatabase>
databases, final ShardingSphereRuleMetaData globalRuleMetaData, final
ConfigurationProperties props) {
this.databases = new ConcurrentHashMap<>(databases.size(), 1);
databases.forEach((key, value) ->
this.databases.put(key.toLowerCase(), value));
this.globalRuleMetaData = globalRuleMetaData;
this.props = props;
}
```
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