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Posted to notifications@shardingsphere.apache.org by pa...@apache.org on 2021/01/07 14:16:01 UTC

[shardingsphere] branch master updated: add support drop resource (#8894)

This is an automated email from the ASF dual-hosted git repository.

panjuan pushed a commit to branch master
in repository https://gitbox.apache.org/repos/asf/shardingsphere.git


The following commit(s) were added to refs/heads/master by this push:
     new 89b3678  add support drop resource (#8894)
89b3678 is described below

commit 89b3678f3bb3206c3b82c9d1685e496a39eaceb1
Author: JingShang Lu <lu...@apache.org>
AuthorDate: Thu Jan 7 22:15:39 2021 +0800

    add support drop resource (#8894)
    
    * add support drop resource
    
    * add check
    
    * fix
    
    * Update CommonErrorCode.java
    
    * Update DistSQLVisitor.java
    
    * fix
    
    * fix
    
    * fix
    
    * Update CommonErrorCode.java
    
    * Update ConfigCenter.java
---
 .../db/protocol/error/CommonErrorCode.java         |   4 +
 .../src/main/antlr4/imports/RDLStatement.g4        |   4 +
 .../distsql/parser/autogen/DistSQLStatement.g4     |   1 +
 .../distsql/parser/core/DistSQLVisitor.java        |  11 ++
 .../rdl/drop/impl/DropResourceStatement.java       |  16 ++-
 .../governance/core/config/ConfigCenter.java       |  10 ++
 .../ReplicaQueryRuleNotExistedException.java       |   2 +-
 ...Exception.java => ResourceInUsedException.java} |   8 +-
 ...ption.java => ResourceNotExistedException.java} |   8 +-
 .../text/distsql/rdl/RDLBackendHandlerFactory.java |   5 +
 .../rdl/impl/DropResourceBackendHandler.java       | 120 +++++++++++++++++++++
 .../text/distsql/RDLBackendHandlerFactoryTest.java |  69 ++++++++++++
 .../frontend/mysql/MySQLErrPacketFactory.java      |   8 ++
 13 files changed, 248 insertions(+), 18 deletions(-)

diff --git a/shardingsphere-db-protocol/shardingsphere-db-protocol-core/src/main/java/org/apache/shardingsphere/db/protocol/error/CommonErrorCode.java b/shardingsphere-db-protocol/shardingsphere-db-protocol-core/src/main/java/org/apache/shardingsphere/db/protocol/error/CommonErrorCode.java
index 0f49283..f42e499 100644
--- a/shardingsphere-db-protocol/shardingsphere-db-protocol-core/src/main/java/org/apache/shardingsphere/db/protocol/error/CommonErrorCode.java
+++ b/shardingsphere-db-protocol/shardingsphere-db-protocol-core/src/main/java/org/apache/shardingsphere/db/protocol/error/CommonErrorCode.java
@@ -32,6 +32,10 @@ public enum CommonErrorCode implements SQLErrorCode {
     SHARDING_TABLE_RULES_NOT_EXISTED(11001, "C11001", "Sharding table rule %s is not exist."),
     
     TABLES_IN_USED(11002, "C11002", "Can not drop rule, tables %s in the rule are still in used."),
+
+    RESOURCE_IN_USED(11003, "C11003", "Can not drop resources, resources %s in the rule are still in used."),
+    
+    RESOURCE_NOT_EXIST(11004, "C11004", "Can not drop resources, resources %s do not exist."),
     
     UNSUPPORTED_COMMAND(19998, "C19998", "Unsupported command: [%s]"),
     
diff --git a/shardingsphere-distsql-parser/shardingsphere-distsql-parser-engine/src/main/antlr4/imports/RDLStatement.g4 b/shardingsphere-distsql-parser/shardingsphere-distsql-parser-engine/src/main/antlr4/imports/RDLStatement.g4
index 88a69d7..138933d 100644
--- a/shardingsphere-distsql-parser/shardingsphere-distsql-parser-engine/src/main/antlr4/imports/RDLStatement.g4
+++ b/shardingsphere-distsql-parser/shardingsphere-distsql-parser-engine/src/main/antlr4/imports/RDLStatement.g4
@@ -23,6 +23,10 @@ addResource
     : ADD RESOURCE LP dataSource (COMMA dataSource)* RP
     ;
 
+dropResource
+    : DROP RESOURCE LP IDENTIFIER (COMMA IDENTIFIER)* RP
+    ;
+
 dataSource
     : dataSourceName EQ dataSourceDefinition
     ;
diff --git a/shardingsphere-distsql-parser/shardingsphere-distsql-parser-engine/src/main/antlr4/org/apache/shardingsphere/distsql/parser/autogen/DistSQLStatement.g4 b/shardingsphere-distsql-parser/shardingsphere-distsql-parser-engine/src/main/antlr4/org/apache/shardingsphere/distsql/parser/autogen/DistSQLStatement.g4
index 4636690..b1d92dd 100644
--- a/shardingsphere-distsql-parser/shardingsphere-distsql-parser-engine/src/main/antlr4/org/apache/shardingsphere/distsql/parser/autogen/DistSQLStatement.g4
+++ b/shardingsphere-distsql-parser/shardingsphere-distsql-parser-engine/src/main/antlr4/org/apache/shardingsphere/distsql/parser/autogen/DistSQLStatement.g4
@@ -21,6 +21,7 @@ import Symbol, RDLStatement, RQLStatement;
 
 execute
     : (addResource
+    | dropResource
     | createShardingRule
     | dropShardingRule
     | createReplicaQueryRule
diff --git a/shardingsphere-distsql-parser/shardingsphere-distsql-parser-engine/src/main/java/org/apache/shardingsphere/distsql/parser/core/DistSQLVisitor.java b/shardingsphere-distsql-parser/shardingsphere-distsql-parser-engine/src/main/java/org/apache/shardingsphere/distsql/parser/core/DistSQLVisitor.java
index 6e27832..dfdb630 100644
--- a/shardingsphere-distsql-parser/shardingsphere-distsql-parser-engine/src/main/java/org/apache/shardingsphere/distsql/parser/core/DistSQLVisitor.java
+++ b/shardingsphere-distsql-parser/shardingsphere-distsql-parser-engine/src/main/java/org/apache/shardingsphere/distsql/parser/core/DistSQLVisitor.java
@@ -29,6 +29,7 @@ import org.apache.shardingsphere.distsql.parser.autogen.DistSQLStatementParser.C
 import org.apache.shardingsphere.distsql.parser.autogen.DistSQLStatementParser.DataSourceContext;
 import org.apache.shardingsphere.distsql.parser.autogen.DistSQLStatementParser.DataSourceDefinitionContext;
 import org.apache.shardingsphere.distsql.parser.autogen.DistSQLStatementParser.DropReplicaQueryRuleContext;
+import org.apache.shardingsphere.distsql.parser.autogen.DistSQLStatementParser.DropResourceContext;
 import org.apache.shardingsphere.distsql.parser.autogen.DistSQLStatementParser.DropShardingRuleContext;
 import org.apache.shardingsphere.distsql.parser.autogen.DistSQLStatementParser.ReplicaQueryRuleDefinitionContext;
 import org.apache.shardingsphere.distsql.parser.autogen.DistSQLStatementParser.SchemaNameContext;
@@ -44,6 +45,7 @@ import org.apache.shardingsphere.distsql.parser.statement.rdl.create.impl.AlterR
 import org.apache.shardingsphere.distsql.parser.statement.rdl.create.impl.CreateReplicaQueryRuleStatement;
 import org.apache.shardingsphere.distsql.parser.statement.rdl.create.impl.CreateShardingRuleStatement;
 import org.apache.shardingsphere.distsql.parser.statement.rdl.drop.impl.DropReplicaQueryRuleStatement;
+import org.apache.shardingsphere.distsql.parser.statement.rdl.drop.impl.DropResourceStatement;
 import org.apache.shardingsphere.distsql.parser.statement.rdl.drop.impl.DropShardingRuleStatement;
 import org.apache.shardingsphere.distsql.parser.statement.rql.show.ShowResourcesStatement;
 import org.apache.shardingsphere.distsql.parser.statement.rql.show.ShowRuleStatement;
@@ -79,6 +81,15 @@ public final class DistSQLVisitor extends DistSQLStatementBaseVisitor<ASTNode> {
     }
     
     @Override
+    public ASTNode visitDropResource(final DropResourceContext ctx) {
+        DropResourceStatement result = new DropResourceStatement();
+        for (TerminalNode each : ctx.IDENTIFIER()) {
+            result.getResourceNames().add(each.getText());
+        }
+        return result;
+    }
+    
+    @Override
     public ASTNode visitDataSourceDefinition(final DataSourceDefinitionContext ctx) {
         DataSourceSegment result = new DataSourceSegment();
         result.setHostName(ctx.hostName().getText());
diff --git a/shardingsphere-proxy/shardingsphere-proxy-backend/src/main/java/org/apache/shardingsphere/proxy/backend/exception/ReplicaQueryRuleNotExistedException.java b/shardingsphere-distsql-parser/shardingsphere-distsql-parser-statement/src/main/java/org/apache/shardingsphere/distsql/parser/statement/rdl/drop/impl/DropResourceStatement.java
similarity index 70%
copy from shardingsphere-proxy/shardingsphere-proxy-backend/src/main/java/org/apache/shardingsphere/proxy/backend/exception/ReplicaQueryRuleNotExistedException.java
copy to shardingsphere-distsql-parser/shardingsphere-distsql-parser-statement/src/main/java/org/apache/shardingsphere/distsql/parser/statement/rdl/drop/impl/DropResourceStatement.java
index 9ee7f04..9f79cf3 100644
--- a/shardingsphere-proxy/shardingsphere-proxy-backend/src/main/java/org/apache/shardingsphere/proxy/backend/exception/ReplicaQueryRuleNotExistedException.java
+++ b/shardingsphere-distsql-parser/shardingsphere-distsql-parser-statement/src/main/java/org/apache/shardingsphere/distsql/parser/statement/rdl/drop/impl/DropResourceStatement.java
@@ -15,21 +15,19 @@
  * limitations under the License.
  */
 
-package org.apache.shardingsphere.proxy.backend.exception;
+package org.apache.shardingsphere.distsql.parser.statement.rdl.drop.impl;
 
 import lombok.Getter;
-import lombok.RequiredArgsConstructor;
+import org.apache.shardingsphere.distsql.parser.statement.rdl.drop.DropRDLStatement;
 
 import java.util.Collection;
+import java.util.LinkedList;
 
 /**
- * replica query rule not existed exception.
+ * Drop resource statement.
  */
-@RequiredArgsConstructor
 @Getter
-public final class ReplicaQueryRuleNotExistedException extends BackendException {
-
-    private static final long serialVersionUID = -5119217255419990719L;
-
-    private final Collection<String> ruleNames;
+public final class DropResourceStatement extends DropRDLStatement {
+    
+    private final Collection<String> resourceNames = new LinkedList<>();
 }
diff --git a/shardingsphere-governance/shardingsphere-governance-core/src/main/java/org/apache/shardingsphere/governance/core/config/ConfigCenter.java b/shardingsphere-governance/shardingsphere-governance-core/src/main/java/org/apache/shardingsphere/governance/core/config/ConfigCenter.java
index 68ab38a..fc5750f 100644
--- a/shardingsphere-governance/shardingsphere-governance-core/src/main/java/org/apache/shardingsphere/governance/core/config/ConfigCenter.java
+++ b/shardingsphere-governance/shardingsphere-governance-core/src/main/java/org/apache/shardingsphere/governance/core/config/ConfigCenter.java
@@ -23,6 +23,7 @@ import com.google.common.base.Strings;
 import com.google.common.eventbus.Subscribe;
 import org.apache.shardingsphere.governance.core.config.checker.RuleConfigurationChecker;
 import org.apache.shardingsphere.governance.core.config.checker.RuleConfigurationCheckerFactory;
+import org.apache.shardingsphere.governance.core.event.model.datasource.DataSourceChangedEvent;
 import org.apache.shardingsphere.governance.core.event.model.datasource.DataSourcePersistEvent;
 import org.apache.shardingsphere.governance.core.event.model.rule.RuleConfigurationsAlteredEvent;
 import org.apache.shardingsphere.governance.core.event.model.rule.RuleConfigurationsPersistEvent;
@@ -113,6 +114,15 @@ public final class ConfigCenter {
     public synchronized void renew(final DataSourcePersistEvent event) {
         addDataSourceConfigurations(event.getSchemaName(), event.getDataSourceConfigurations());
     }
+
+    /**
+     * Change data source configurations.
+     * @param event Data source event.
+     */
+    @Subscribe
+    public synchronized void renew(final DataSourceChangedEvent event) {
+        persistDataSourceConfigurations(event.getSchemaName(), event.getDataSourceConfigurations());
+    }
     
     /**
      * Persist rule configurations.
diff --git a/shardingsphere-proxy/shardingsphere-proxy-backend/src/main/java/org/apache/shardingsphere/proxy/backend/exception/ReplicaQueryRuleNotExistedException.java b/shardingsphere-proxy/shardingsphere-proxy-backend/src/main/java/org/apache/shardingsphere/proxy/backend/exception/ReplicaQueryRuleNotExistedException.java
index 9ee7f04..bcc955b 100644
--- a/shardingsphere-proxy/shardingsphere-proxy-backend/src/main/java/org/apache/shardingsphere/proxy/backend/exception/ReplicaQueryRuleNotExistedException.java
+++ b/shardingsphere-proxy/shardingsphere-proxy-backend/src/main/java/org/apache/shardingsphere/proxy/backend/exception/ReplicaQueryRuleNotExistedException.java
@@ -23,7 +23,7 @@ import lombok.RequiredArgsConstructor;
 import java.util.Collection;
 
 /**
- * replica query rule not existed exception.
+ * Replica query rule not existed exception.
  */
 @RequiredArgsConstructor
 @Getter
diff --git a/shardingsphere-proxy/shardingsphere-proxy-backend/src/main/java/org/apache/shardingsphere/proxy/backend/exception/ReplicaQueryRuleNotExistedException.java b/shardingsphere-proxy/shardingsphere-proxy-backend/src/main/java/org/apache/shardingsphere/proxy/backend/exception/ResourceInUsedException.java
similarity index 80%
copy from shardingsphere-proxy/shardingsphere-proxy-backend/src/main/java/org/apache/shardingsphere/proxy/backend/exception/ReplicaQueryRuleNotExistedException.java
copy to shardingsphere-proxy/shardingsphere-proxy-backend/src/main/java/org/apache/shardingsphere/proxy/backend/exception/ResourceInUsedException.java
index 9ee7f04..7609f53 100644
--- a/shardingsphere-proxy/shardingsphere-proxy-backend/src/main/java/org/apache/shardingsphere/proxy/backend/exception/ReplicaQueryRuleNotExistedException.java
+++ b/shardingsphere-proxy/shardingsphere-proxy-backend/src/main/java/org/apache/shardingsphere/proxy/backend/exception/ResourceInUsedException.java
@@ -23,13 +23,13 @@ import lombok.RequiredArgsConstructor;
 import java.util.Collection;
 
 /**
- * replica query rule not existed exception.
+ * Resource in used exception.
  */
 @RequiredArgsConstructor
 @Getter
-public final class ReplicaQueryRuleNotExistedException extends BackendException {
+public final class ResourceInUsedException extends BackendException {
 
-    private static final long serialVersionUID = -5119217255419990719L;
+    private static final long serialVersionUID = -3427324685070457375L;
 
-    private final Collection<String> ruleNames;
+    private final Collection<String> resourceNames;
 }
diff --git a/shardingsphere-proxy/shardingsphere-proxy-backend/src/main/java/org/apache/shardingsphere/proxy/backend/exception/ReplicaQueryRuleNotExistedException.java b/shardingsphere-proxy/shardingsphere-proxy-backend/src/main/java/org/apache/shardingsphere/proxy/backend/exception/ResourceNotExistedException.java
similarity index 80%
copy from shardingsphere-proxy/shardingsphere-proxy-backend/src/main/java/org/apache/shardingsphere/proxy/backend/exception/ReplicaQueryRuleNotExistedException.java
copy to shardingsphere-proxy/shardingsphere-proxy-backend/src/main/java/org/apache/shardingsphere/proxy/backend/exception/ResourceNotExistedException.java
index 9ee7f04..3a6d7f1 100644
--- a/shardingsphere-proxy/shardingsphere-proxy-backend/src/main/java/org/apache/shardingsphere/proxy/backend/exception/ReplicaQueryRuleNotExistedException.java
+++ b/shardingsphere-proxy/shardingsphere-proxy-backend/src/main/java/org/apache/shardingsphere/proxy/backend/exception/ResourceNotExistedException.java
@@ -23,13 +23,13 @@ import lombok.RequiredArgsConstructor;
 import java.util.Collection;
 
 /**
- * replica query rule not existed exception.
+ * Resource not existed exception.
  */
 @RequiredArgsConstructor
 @Getter
-public final class ReplicaQueryRuleNotExistedException extends BackendException {
+public final class ResourceNotExistedException extends BackendException {
 
-    private static final long serialVersionUID = -5119217255419990719L;
+    private static final long serialVersionUID = 1704331180489268L;
 
-    private final Collection<String> ruleNames;
+    private final Collection<String> resourceNames;
 }
diff --git a/shardingsphere-proxy/shardingsphere-proxy-backend/src/main/java/org/apache/shardingsphere/proxy/backend/text/distsql/rdl/RDLBackendHandlerFactory.java b/shardingsphere-proxy/shardingsphere-proxy-backend/src/main/java/org/apache/shardingsphere/proxy/backend/text/distsql/rdl/RDLBackendHandlerFactory.java
index 57bc594..b04a7c6 100644
--- a/shardingsphere-proxy/shardingsphere-proxy-backend/src/main/java/org/apache/shardingsphere/proxy/backend/text/distsql/rdl/RDLBackendHandlerFactory.java
+++ b/shardingsphere-proxy/shardingsphere-proxy-backend/src/main/java/org/apache/shardingsphere/proxy/backend/text/distsql/rdl/RDLBackendHandlerFactory.java
@@ -24,6 +24,7 @@ import org.apache.shardingsphere.distsql.parser.statement.rdl.create.impl.AlterR
 import org.apache.shardingsphere.distsql.parser.statement.rdl.create.impl.CreateReplicaQueryRuleStatement;
 import org.apache.shardingsphere.distsql.parser.statement.rdl.create.impl.CreateShardingRuleStatement;
 import org.apache.shardingsphere.distsql.parser.statement.rdl.drop.impl.DropReplicaQueryRuleStatement;
+import org.apache.shardingsphere.distsql.parser.statement.rdl.drop.impl.DropResourceStatement;
 import org.apache.shardingsphere.distsql.parser.statement.rdl.drop.impl.DropShardingRuleStatement;
 import org.apache.shardingsphere.infra.context.metadata.impl.StandardMetaDataContexts;
 import org.apache.shardingsphere.infra.database.type.DatabaseType;
@@ -37,6 +38,7 @@ import org.apache.shardingsphere.proxy.backend.text.distsql.rdl.impl.CreateRepli
 import org.apache.shardingsphere.proxy.backend.text.distsql.rdl.impl.CreateShardingRuleBackendHandler;
 import org.apache.shardingsphere.proxy.backend.text.distsql.rdl.impl.DropDatabaseBackendHandler;
 import org.apache.shardingsphere.proxy.backend.text.distsql.rdl.impl.DropReplicaQueryRuleBackendHandler;
+import org.apache.shardingsphere.proxy.backend.text.distsql.rdl.impl.DropResourceBackendHandler;
 import org.apache.shardingsphere.proxy.backend.text.distsql.rdl.impl.DropShardingRuleBackendHandler;
 import org.apache.shardingsphere.sql.parser.sql.common.statement.SQLStatement;
 import org.apache.shardingsphere.sql.parser.sql.common.statement.ddl.CreateDatabaseStatement;
@@ -78,6 +80,9 @@ public final class RDLBackendHandlerFactory {
         if (sqlStatement instanceof AddResourceStatement) {
             return Optional.of(new AddResourceBackendHandler(databaseType, (AddResourceStatement) sqlStatement, backendConnection));
         }
+        if (sqlStatement instanceof DropResourceStatement) {
+            return Optional.of(new DropResourceBackendHandler((DropResourceStatement) sqlStatement, backendConnection));
+        }
         if (sqlStatement instanceof CreateDatabaseStatement) {
             return Optional.of(new CreateDatabaseBackendHandler((CreateDatabaseStatement) sqlStatement));
         }
diff --git a/shardingsphere-proxy/shardingsphere-proxy-backend/src/main/java/org/apache/shardingsphere/proxy/backend/text/distsql/rdl/impl/DropResourceBackendHandler.java b/shardingsphere-proxy/shardingsphere-proxy-backend/src/main/java/org/apache/shardingsphere/proxy/backend/text/distsql/rdl/impl/DropResourceBackendHandler.java
new file mode 100644
index 0000000..be37219
--- /dev/null
+++ b/shardingsphere-proxy/shardingsphere-proxy-backend/src/main/java/org/apache/shardingsphere/proxy/backend/text/distsql/rdl/impl/DropResourceBackendHandler.java
@@ -0,0 +1,120 @@
+/*
+ * Licensed to the Apache Software Foundation (ASF) under one or more
+ * contributor license agreements.  See the NOTICE file distributed with
+ * this work for additional information regarding copyright ownership.
+ * The ASF licenses this file to You under the Apache License, Version 2.0
+ * (the "License"); you may not use this file except in compliance with
+ * the License.  You may obtain a copy of the License at
+ *
+ *     http://www.apache.org/licenses/LICENSE-2.0
+ *
+ * Unless required by applicable law or agreed to in writing, software
+ * distributed under the License is distributed on an "AS IS" BASIS,
+ * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
+ * See the License for the specific language governing permissions and
+ * limitations under the License.
+ */
+
+package org.apache.shardingsphere.proxy.backend.text.distsql.rdl.impl;
+
+import org.apache.shardingsphere.distsql.parser.statement.rdl.drop.impl.DropResourceStatement;
+import org.apache.shardingsphere.governance.core.event.model.datasource.DataSourceChangedEvent;
+import org.apache.shardingsphere.infra.config.datasource.DataSourceConfiguration;
+import org.apache.shardingsphere.infra.config.datasource.DataSourceConverter;
+import org.apache.shardingsphere.infra.datanode.DataNode;
+import org.apache.shardingsphere.infra.eventbus.ShardingSphereEventBus;
+import org.apache.shardingsphere.infra.rule.ShardingSphereRule;
+import org.apache.shardingsphere.infra.rule.type.DataNodeContainedRule;
+import org.apache.shardingsphere.infra.rule.type.DataSourceContainedRule;
+import org.apache.shardingsphere.proxy.backend.communication.jdbc.connection.BackendConnection;
+import org.apache.shardingsphere.proxy.backend.context.ProxyContext;
+import org.apache.shardingsphere.proxy.backend.exception.ResourceNotExistedException;
+import org.apache.shardingsphere.proxy.backend.exception.ResourceInUsedException;
+import org.apache.shardingsphere.proxy.backend.response.header.ResponseHeader;
+import org.apache.shardingsphere.proxy.backend.response.header.update.UpdateResponseHeader;
+import org.apache.shardingsphere.proxy.backend.text.SchemaRequiredBackendHandler;
+
+import javax.sql.DataSource;
+import java.util.Collection;
+import java.util.HashSet;
+import java.util.LinkedList;
+import java.util.Map;
+import java.util.Set;
+import java.util.stream.Collectors;
+
+/**
+ * Drop resource backend handler.
+ */
+public final class DropResourceBackendHandler extends SchemaRequiredBackendHandler<DropResourceStatement> {
+
+    public DropResourceBackendHandler(final DropResourceStatement sqlStatement, final BackendConnection backendConnection) {
+        super(sqlStatement, backendConnection);
+    }
+    
+    @Override
+    public ResponseHeader execute(final String schemaName, final DropResourceStatement sqlStatement) {
+        Collection<String> resourceNames = sqlStatement.getResourceNames();
+        check(schemaName, resourceNames);
+        Map<String, DataSource> resourceMap = drop(schemaName, resourceNames);
+        post(schemaName, resourceMap);
+        return new UpdateResponseHeader(sqlStatement);
+    }
+    
+    private void check(final String schemaName, final Collection<String> resourceNames) {
+        Map<String, DataSource> resourceMap = ProxyContext.getInstance().getMetaData(schemaName).getResource().getDataSources();
+        if (null == resourceMap || resourceMap.isEmpty()) {
+            throw new ResourceNotExistedException(resourceNames);
+        }
+        Collection<String> notExistedResourceNames = resourceNames.stream().filter(each -> !resourceMap.containsKey(each)).collect(Collectors.toList());
+        if (!notExistedResourceNames.isEmpty()) {
+            throw new ResourceNotExistedException(notExistedResourceNames);
+        }
+        Collection<ShardingSphereRule> ruleConfig = ProxyContext.getInstance().getMetaData(schemaName).getRuleMetaData().getRules();
+        Set<String> useResources = new HashSet<>();
+        for (ShardingSphereRule each : ruleConfig) {
+            if (each instanceof DataSourceContainedRule) {
+                useResources = getResouces((DataSourceContainedRule) each);
+            } else if (each instanceof DataNodeContainedRule) {
+                useResources = getResouces((DataNodeContainedRule) each);
+            }
+        }
+        Collection<String> conflictResources = new LinkedList<>();
+        for (String each : useResources) {
+            if (useResources.contains(each)) {
+                conflictResources.add(each);
+            }
+        }
+        if (!conflictResources.isEmpty()) {
+            throw new ResourceInUsedException(notExistedResourceNames);
+        }
+    }
+
+    private Set<String> getResouces(final DataSourceContainedRule rule) {
+        Set<String> result = new HashSet<>();
+        for (Collection<String> each : rule.getDataSourceMapper().values()) {
+            result.addAll(each);
+        }
+        return result;
+    }
+
+    private Set<String> getResouces(final DataNodeContainedRule rule) {
+        Set<String> result = new HashSet<>();
+        for (Collection<DataNode> each : rule.getAllDataNodes().values()) {
+            result.addAll(each.stream().map(DataNode::getDataSourceName).collect(Collectors.toList()));
+        }
+        return result;
+    }
+
+    private Map<String, DataSource> drop(final String schemaName, final Collection<String> resourceNames) {
+        Map<String, DataSource> result = ProxyContext.getInstance().getMetaData(schemaName).getResource().getDataSources();
+        for (String each : resourceNames) {
+            result.remove(each);
+        }
+        return result;
+    }
+    
+    private void post(final String schemaName, final Map<String, DataSource> resourceMap) {
+        Map<String, DataSourceConfiguration> datasourceMap = DataSourceConverter.getDataSourceConfigurationMap(resourceMap);
+        ShardingSphereEventBus.getInstance().post(new DataSourceChangedEvent(schemaName, datasourceMap));
+    }
+}
diff --git a/shardingsphere-proxy/shardingsphere-proxy-backend/src/test/java/org/apache/shardingsphere/proxy/backend/text/distsql/RDLBackendHandlerFactoryTest.java b/shardingsphere-proxy/shardingsphere-proxy-backend/src/test/java/org/apache/shardingsphere/proxy/backend/text/distsql/RDLBackendHandlerFactoryTest.java
index 462b7cb..ba90c10 100644
--- a/shardingsphere-proxy/shardingsphere-proxy-backend/src/test/java/org/apache/shardingsphere/proxy/backend/text/distsql/RDLBackendHandlerFactoryTest.java
+++ b/shardingsphere-proxy/shardingsphere-proxy-backend/src/test/java/org/apache/shardingsphere/proxy/backend/text/distsql/RDLBackendHandlerFactoryTest.java
@@ -19,7 +19,11 @@ package org.apache.shardingsphere.proxy.backend.text.distsql;
 
 import lombok.SneakyThrows;
 import org.apache.shardingsphere.distsql.parser.statement.rdl.create.impl.AddResourceStatement;
+import org.apache.shardingsphere.distsql.parser.statement.rdl.create.impl.AlterReplicaQueryRuleStatement;
+import org.apache.shardingsphere.distsql.parser.statement.rdl.create.impl.CreateReplicaQueryRuleStatement;
 import org.apache.shardingsphere.distsql.parser.statement.rdl.create.impl.CreateShardingRuleStatement;
+import org.apache.shardingsphere.distsql.parser.statement.rdl.drop.impl.DropReplicaQueryRuleStatement;
+import org.apache.shardingsphere.distsql.parser.statement.rdl.drop.impl.DropResourceStatement;
 import org.apache.shardingsphere.infra.auth.builtin.DefaultAuthentication;
 import org.apache.shardingsphere.infra.config.properties.ConfigurationProperties;
 import org.apache.shardingsphere.infra.context.metadata.MetaDataContexts;
@@ -30,6 +34,7 @@ import org.apache.shardingsphere.infra.metadata.ShardingSphereMetaData;
 import org.apache.shardingsphere.proxy.backend.communication.jdbc.connection.BackendConnection;
 import org.apache.shardingsphere.proxy.backend.context.ProxyContext;
 import org.apache.shardingsphere.proxy.backend.exception.DBCreateExistsException;
+import org.apache.shardingsphere.proxy.backend.exception.ReplicaQueryRuleNotExistedException;
 import org.apache.shardingsphere.proxy.backend.response.header.ResponseHeader;
 import org.apache.shardingsphere.proxy.backend.response.header.update.UpdateResponseHeader;
 import org.apache.shardingsphere.proxy.backend.text.TextProtocolBackendHandler;
@@ -186,6 +191,70 @@ public final class RDLBackendHandlerFactoryTest {
         ResponseHeader response = rdlBackendHandler.get().execute();
         assertThat(response, instanceOf(UpdateResponseHeader.class));
     }
+
+    @Test(expected = ClassCastException.class)
+    public void assertExecuteDropResourceContext() throws SQLException {
+        BackendConnection connection = mock(BackendConnection.class);
+        when(connection.getSchemaName()).thenReturn("schema");
+        try {
+            RDLBackendHandlerFactory.newInstance(new MySQLDatabaseType(), mock(DropResourceStatement.class), connection);
+        } catch (final SQLException ex) {
+            assertThat(ex.getMessage(), is("No Registry center to execute `DropResourceStatement` SQL"));
+        }
+        setGovernanceMetaDataContexts(true);
+        Optional<TextProtocolBackendHandler> rdlBackendHandler = RDLBackendHandlerFactory.newInstance(new MySQLDatabaseType(), mock(DropResourceStatement.class), connection);
+        assertTrue(rdlBackendHandler.isPresent());
+        ResponseHeader response = rdlBackendHandler.get().execute();
+        assertThat(response, instanceOf(UpdateResponseHeader.class));
+    }
+
+    @Test(expected = ReplicaQueryRuleNotExistedException.class)
+    public void assertExecuteDropReplicaQueryRuleContext() throws SQLException {
+        BackendConnection connection = mock(BackendConnection.class);
+        when(connection.getSchemaName()).thenReturn("schema");
+        try {
+            RDLBackendHandlerFactory.newInstance(new MySQLDatabaseType(), mock(DropReplicaQueryRuleStatement.class), connection);
+        } catch (final SQLException ex) {
+            assertThat(ex.getMessage(), is("No Registry center to execute `DropReplicaQueryRuleStatement` SQL"));
+        }
+        setGovernanceMetaDataContexts(true);
+        Optional<TextProtocolBackendHandler> rdlBackendHandler = RDLBackendHandlerFactory.newInstance(new MySQLDatabaseType(), mock(DropReplicaQueryRuleStatement.class), connection);
+        assertTrue(rdlBackendHandler.isPresent());
+        ResponseHeader response = rdlBackendHandler.get().execute();
+        assertThat(response, instanceOf(UpdateResponseHeader.class));
+    }
+
+    @Test
+    public void assertExecuteCreateReplicaQueryRuleContext() throws SQLException {
+        BackendConnection connection = mock(BackendConnection.class);
+        when(connection.getSchemaName()).thenReturn("schema");
+        try {
+            RDLBackendHandlerFactory.newInstance(new MySQLDatabaseType(), mock(CreateReplicaQueryRuleStatement.class), connection);
+        } catch (final SQLException ex) {
+            assertThat(ex.getMessage(), is("No Registry center to execute `CreateReplicaQueryRuleStatement` SQL"));
+        }
+        setGovernanceMetaDataContexts(true);
+        Optional<TextProtocolBackendHandler> rdlBackendHandler = RDLBackendHandlerFactory.newInstance(new MySQLDatabaseType(), mock(CreateReplicaQueryRuleStatement.class), connection);
+        assertTrue(rdlBackendHandler.isPresent());
+        ResponseHeader response = rdlBackendHandler.get().execute();
+        assertThat(response, instanceOf(UpdateResponseHeader.class));
+    }
+
+    @Test(expected = ReplicaQueryRuleNotExistedException.class)
+    public void assertExecuteAlterReplicaQueryRuleContext() throws SQLException {
+        BackendConnection connection = mock(BackendConnection.class);
+        when(connection.getSchemaName()).thenReturn("schema");
+        try {
+            RDLBackendHandlerFactory.newInstance(new MySQLDatabaseType(), mock(AlterReplicaQueryRuleStatement.class), connection);
+        } catch (final SQLException ex) {
+            assertThat(ex.getMessage(), is("No Registry center to execute `AlterReplicaQueryRuleStatement` SQL"));
+        }
+        setGovernanceMetaDataContexts(true);
+        Optional<TextProtocolBackendHandler> rdlBackendHandler = RDLBackendHandlerFactory.newInstance(new MySQLDatabaseType(), mock(AlterReplicaQueryRuleStatement.class), connection);
+        assertTrue(rdlBackendHandler.isPresent());
+        ResponseHeader response = rdlBackendHandler.get().execute();
+        assertThat(response, instanceOf(UpdateResponseHeader.class));
+    }
     
     @SneakyThrows(ReflectiveOperationException.class)
     private void setGovernanceMetaDataContexts(final boolean isGovernance) {
diff --git a/shardingsphere-proxy/shardingsphere-proxy-frontend/shardingsphere-proxy-frontend-mysql/src/main/java/org/apache/shardingsphere/proxy/frontend/mysql/MySQLErrPacketFactory.java b/shardingsphere-proxy/shardingsphere-proxy-frontend/shardingsphere-proxy-frontend-mysql/src/main/java/org/apache/shardingsphere/proxy/frontend/mysql/MySQLErrPacketFactory.java
index 363a3ec..7a900c3 100644
--- a/shardingsphere-proxy/shardingsphere-proxy-frontend/shardingsphere-proxy-frontend-mysql/src/main/java/org/apache/shardingsphere/proxy/frontend/mysql/MySQLErrPacketFactory.java
+++ b/shardingsphere-proxy/shardingsphere-proxy-frontend/shardingsphere-proxy-frontend-mysql/src/main/java/org/apache/shardingsphere/proxy/frontend/mysql/MySQLErrPacketFactory.java
@@ -28,6 +28,8 @@ import org.apache.shardingsphere.proxy.backend.exception.DBCreateExistsException
 import org.apache.shardingsphere.proxy.backend.exception.DBDropExistsException;
 import org.apache.shardingsphere.proxy.backend.exception.LockWaitTimeoutException;
 import org.apache.shardingsphere.proxy.backend.exception.NoDatabaseSelectedException;
+import org.apache.shardingsphere.proxy.backend.exception.ResourceInUsedException;
+import org.apache.shardingsphere.proxy.backend.exception.ResourceNotExistedException;
 import org.apache.shardingsphere.proxy.backend.exception.RuleNotExistsException;
 import org.apache.shardingsphere.proxy.backend.exception.ShardingTableRuleNotExistedException;
 import org.apache.shardingsphere.proxy.backend.exception.TableModifyInTransactionException;
@@ -110,6 +112,12 @@ public final class MySQLErrPacketFactory {
         if (cause instanceof LockWaitTimeoutException) {
             return new MySQLErrPacket(1, MySQLServerErrorCode.ER_LOCKING_SERVICE_TIMEOUT, ((LockWaitTimeoutException) cause).getTimeoutMilliseconds());
         }
+        if (cause instanceof ResourceNotExistedException) {
+            return new MySQLErrPacket(1, CommonErrorCode.RESOURCE_NOT_EXIST, cause.getMessage());
+        }
+        if (cause instanceof ResourceInUsedException) {
+            return new MySQLErrPacket(1, CommonErrorCode.RESOURCE_IN_USED, cause.getMessage());
+        }
         return new MySQLErrPacket(1, CommonErrorCode.UNKNOWN_EXCEPTION, cause.getMessage());
     }
 }