totalo commented on a change in pull request #11028:
URL: https://github.com/apache/shardingsphere/pull/11028#discussion_r661985587



##########
File path: 
shardingsphere-infra/shardingsphere-infra-context/src/main/java/org/apache/shardingsphere/infra/context/metadata/MetaDataContextsBuilder.java
##########
@@ -94,21 +96,21 @@ public StandardMetaDataContexts build() throws SQLException 
{
             Collection<RuleConfiguration> ruleConfigs = 
schemaRuleConfigs.get(each);
             DatabaseType databaseType = 
DatabaseTypeRecognizer.getDatabaseType(dataSourceMap.values());
             Collection<ShardingSphereRule> rules = 
ShardingSphereRulesBuilder.buildSchemaRules(each, ruleConfigs, databaseType, 
dataSourceMap);
-            Map<Map<String, TableMetaData>, Map<String, TableMetaData>> 
tableMetaDataMap = SchemaBuilder.build(new SchemaBuilderMaterials(databaseType, 
dataSourceMap, rules, props));
+            Map<TableMetaData, TableMetaData> tableMetaDatas = 
SchemaBuilder.build(new SchemaBuilderMaterials(databaseType, dataSourceMap, 
rules, props));
             ShardingSphereRuleMetaData ruleMetaData = new 
ShardingSphereRuleMetaData(ruleConfigs, rules);
             ShardingSphereResource resource = buildResource(databaseType, 
dataSourceMap);
-            ShardingSphereSchema actualSchema = new 
ShardingSphereSchema(tableMetaDataMap.keySet().iterator().next());
+            ShardingSphereSchema actualSchema = new 
ShardingSphereSchema(tableMetaDatas.keySet().stream().filter(Objects::nonNull).collect(Collectors.toMap(TableMetaData::getName,
 v -> v)));
             actualMetaDataMap.put(each, new ShardingSphereMetaData(each, 
resource, ruleMetaData, actualSchema));
-            metaDataMap.put(each, new ShardingSphereMetaData(each, resource, 
ruleMetaData, buildSchema(tableMetaDataMap)));
+            metaDataMap.put(each, new ShardingSphereMetaData(each, resource, 
ruleMetaData, buildSchema(tableMetaDatas)));
         }
         OptimizeContextFactory optimizeContextFactory = new 
OptimizeContextFactory(actualMetaDataMap);
         return new StandardMetaDataContexts(metaDataMap, 
buildGlobalSchemaMetaData(metaDataMap), executorEngine, props, 
optimizeContextFactory);
     }
-
-    private ShardingSphereSchema buildSchema(final Map<Map<String, 
TableMetaData>, Map<String, TableMetaData>> tableMetaDataMap) {
-        Map<String, TableMetaData> tables = new 
HashMap<>(tableMetaDataMap.size(), 1);
-        tables.putAll(tableMetaDataMap.keySet().iterator().next());
-        tables.putAll(tableMetaDataMap.values().iterator().next());
+    
+    private ShardingSphereSchema buildSchema(final Map<TableMetaData, 
TableMetaData> tableMetaDatas) {

Review comment:
       @tristaZero hi , I fixed this issue in #11086 .




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