实现了使用mysql来持久化flink table元数据的catalog。 (#703)

dlink-catalog/README.md

+# 自定义实现的catalog
+## 目标
+用于保存 flink sql创建的元数据
+
+- 实现了 database table view 的 create ，alter， drop，list，get 操作。
+- partition相关操作: 根据文档，只有再文件系统的connector才需要这个功能。
+>例如 在 hdfs 上，其作用是在文件系统上根据分区字段创建目录，列出已有的分区目录，修改分区目录等。根据评估，如果是应对流数据，暂时不需要实现该功能。
+如果是针对hdfs，则使用hive catalog来作为 catalog 更好
+如果是其他fs类的支持，需要适配各种环境，不利于做到通用性。
+故这个部分未进行实现。
+
+- 对各类 Statistics 也未进行实现，因为流数据无法获取相关的条数，数据大小等。
+
+## 用法
+1. 将打好包的jar放到flink lib目录
+2. 引入mysql driver，需要支持 com.mysql.cj.jdbc.Driver 这个暂时是写死的。
+3. 使用mycatalog.sql 初始化meta库所需的表。
+4. 在flink conf目录下创建配置文件 mysql-catalog.properties
+5. 根据你的环境启动sql client 或者在代码中使用 flink sql来创建catalog，注册catalog。
+
+> flink sql:
+```roomsql 
+create catalog mycatalog 
+    with(
+        'type'='dlink_mysql_catalog'
+        );
+        
+use catalog mycatalog;
+```
+
+> java
+```java 
+        DlinkMysqlCatalog catalog =
+                new DlinkMysqlCatalog(
+                        "myCatalog");
+        tableEnv.registerCatalog(DlinkMysqlCatalogFactoryOptions.IDENTIFIER, catalog);
+        tableEnv.useCatalog(DlinkMysqlCatalogFactoryOptions.IDENTIFIER);
+```
+## 注意
+> 在dlink mysql catalog的实现中，对默认数据库进行了限制，不允许用户自定义默认数据库名称。
+todo: 在yaml文件中定义 catalog 的方法。
+
+

dlink-catalog/dlink-catalog-mysql/dlink-catalog-mysql-1.14/pom.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <parent>
+        <artifactId>dlink-catalog-mysql</artifactId>
+        <groupId>com.dlink</groupId>
+        <version>0.6.6-SNAPSHOT</version>
+    </parent>
+    <modelVersion>4.0.0</modelVersion>
+
+    <artifactId>dlink-catalog-mysql-1.14</artifactId>
+
+    <properties>
+        <maven.compiler.source>8</maven.compiler.source>
+        <maven.compiler.target>8</maven.compiler.target>
+    </properties>
+
+    <dependencies>
+        <dependency>
+            <groupId>com.dlink</groupId>
+            <artifactId>dlink-common</artifactId>
+        </dependency>
+        <dependency>
+            <groupId>com.dlink</groupId>
+            <artifactId>dlink-flink-1.14</artifactId>
+            <!--            <scope>provided</scope>-->
+        </dependency>
+        <dependency>
+            <groupId>junit</groupId>
+            <artifactId>junit</artifactId>
+            <version>4.13.2</version>
+            <scope>test</scope>
+        </dependency>
+    </dependencies>
+</project>
\ No newline at end of file

dlink-catalog/dlink-catalog-mysql/dlink-catalog-mysql-1.14/src/main/java/com/dlink/flink/catalog/factory/DlinkMysqlCatalogFactory.java

+/*
+ * 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 com.dlink.flink.catalog.factory;
+
+import com.dlink.flink.catalog.DlinkMysqlCatalog;
+import org.apache.flink.configuration.ConfigOption;
+import org.apache.flink.table.catalog.Catalog;
+import org.apache.flink.table.factories.CatalogFactory;
+import org.apache.flink.table.factories.FactoryUtil;
+
+import java.util.HashSet;
+import java.util.Set;
+
+import static com.dlink.flink.catalog.factory.DlinkMysqlCatalogFactoryOptions.*;
+import static org.apache.flink.table.factories.FactoryUtil.PROPERTY_VERSION;
+
+/** Factory for {@link DlinkMysqlCatalog}. */
+public class DlinkMysqlCatalogFactory implements CatalogFactory {
+
+    @Override
+    public String factoryIdentifier() {
+        return DlinkMysqlCatalogFactoryOptions.IDENTIFIER;
+    }
+
+    @Override
+    public Set<ConfigOption<?>> requiredOptions() {
+        final Set<ConfigOption<?>> options = new HashSet<>();
+        return options;
+    }
+
+    @Override
+    public Set<ConfigOption<?>> optionalOptions() {
+        final Set<ConfigOption<?>> options = new HashSet<>();
+        options.add(USERNAME);
+        options.add(PASSWORD);
+        options.add(URL);
+        options.add(PROPERTY_VERSION);
+        return options;
+    }
+
+    @Override
+    public Catalog createCatalog(Context context) {
+        final FactoryUtil.CatalogFactoryHelper helper =
+                FactoryUtil.createCatalogFactoryHelper(this, context);
+        helper.validate();
+
+        return new DlinkMysqlCatalog(
+                context.getName(),
+                helper.getOptions().get(URL),
+                helper.getOptions().get(USERNAME),
+                helper.getOptions().get(PASSWORD));
+    }
+}

dlink-catalog/dlink-catalog-mysql/dlink-catalog-mysql-1.14/src/main/java/com/dlink/flink/catalog/factory/DlinkMysqlCatalogFactoryOptions.java

+/*
+ * 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 com.dlink.flink.catalog.factory;
+
+import com.dlink.flink.catalog.DlinkMysqlCatalog;
+import org.apache.flink.annotation.Internal;
+import org.apache.flink.configuration.ConfigConstants;
+import org.apache.flink.configuration.ConfigOption;
+import org.apache.flink.configuration.ConfigOptions;
+import org.apache.flink.table.catalog.CommonCatalogOptions;
+import org.apache.flink.table.catalog.exceptions.CatalogException;
+
+import java.io.File;
+import java.io.FileInputStream;
+import java.io.InputStream;
+import java.util.Properties;
+
+/**
+ * {@link ConfigOption}s for {@link DlinkMysqlCatalog}.
+ */
+@Internal
+public class DlinkMysqlCatalogFactoryOptions {
+
+    public static final String IDENTIFIER = "dlink_mysql_catalog";
+
+    public static final ConfigOption<String> USERNAME; // =
+    // ConfigOptions.key("mysql-catalog-username").stringType().noDefaultValue();
+
+    public static final ConfigOption<String> PASSWORD; // =
+    // ConfigOptions.key("mysql-catalog-password").stringType().noDefaultValue();
+
+    public static final ConfigOption<String> URL; // =
+    //             ConfigOptions.key("mysql-catalog-url").stringType().noDefaultValue();
+
+    public static final String prefix = "dlink-mysql-catalog";
+
+    static {
+        try {
+            String configPath = System.getenv(ConfigConstants.ENV_FLINK_CONF_DIR);
+            if (!configPath.endsWith("/")) {
+                configPath = configPath + "/";
+            }
+            configPath = configPath + addPrefix(".properties");
+            File propFile = new File(configPath);
+            if (!propFile.exists()) {
+                throw new CatalogException("配置文件不存在！");
+            }
+            InputStream is = new FileInputStream(propFile);
+            Properties props = new Properties();
+            props.load(is);
+            String username = props.getProperty(addPrefix("-username"));
+            USERNAME = ConfigOptions.key(addPrefix("-username"))
+                    .stringType()
+                    .defaultValue(username);
+
+            String password = props.getProperty(addPrefix("-password"));
+            PASSWORD = ConfigOptions.key(addPrefix("-password"))
+                    .stringType()
+                    .defaultValue(password);
+
+            String url = props.getProperty(addPrefix("-url"));
+            URL = ConfigOptions.key(addPrefix("-url"))
+                    .stringType()
+                    .defaultValue(url);
+        } catch (Exception e) {
+            throw new CatalogException("获取配置信息失败！", e);
+        }
+    }
+
+    private static String addPrefix(String key) {
+        return prefix + key;
+    }
+
+    private DlinkMysqlCatalogFactoryOptions() {
+    }
+}

dlink-catalog/dlink-catalog-mysql/dlink-catalog-mysql-1.14/src/main/resources/META-INF/services/org.apache.flink.table.factories.Factory

+# 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.
+
+com.dlink.flink.catalog.factory.DlinkMysqlCatalogFactory

dlink-catalog/dlink-catalog-mysql/dlink-catalog-mysql-1.14/src/main/resources/dlink-mysql-catalog.properties

+# catalog数据库用户名
+dlink-mysql-catalog-username=root
+# catalog 数据库密码
+dlink-mysql-catalog-password=123456
+# catalog 数据库url
+dlink-mysql-catalog-url=jdbc:mysql://localhost:3306/flink_metastore?useUnicode=true&characterEncoding=utf8&serverTimezone=UTC
\ No newline at end of file

dlink-catalog/dlink-catalog-mysql/dlink-catalog-mysql-1.14/src/main/resources/dlinkmysqlcatalog.sql

+drop table if exists `metadata_database`
+create  table if not exists `metadata_database` (
+  `id` int(11) not null AUTO_INCREMENT COMMENT '主键',
+  `database_name` varchar(255) NOT NULL COMMENT '名称',
+  `description` varchar(255) null comment'描述',
+  `update_time` datetime DEFAULT NULL COMMENT '更新时间',
+  `create_time` datetime NULL DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间',
+  PRIMARY KEY (`id`)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COMMENT='元数据对象信息'
+
+drop table if exists `metadata_table`
+create  table if not exists `metadata_table` (
+  `id` int(11) not null AUTO_INCREMENT COMMENT '主键',
+  `table_name` varchar(255) NOT NULL COMMENT '名称',
+  `table_type` varchar(255) NOT null comment '对象类型，分为：database 和 table view',
+  `database_id` int(11) not null COMMENT '数据库主键',
+  `description` varchar(255) null comment'描述',
+  `update_time` datetime DEFAULT NULL COMMENT '更新时间',
+  `create_time` datetime NULL DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间',
+  PRIMARY KEY (`id`)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COMMENT='元数据对象信息'
+
+drop table if exists `metadata_database_property`
+create  table if not exists `metadata_database_property` (
+  `key` varchar(255) NOT NULL COMMENT '属性key',
+  `value` varchar(255) NULL COMMENT '属性value',
+  `database_id` int(11) not null COMMENT '数据库主键',
+  `update_time` datetime DEFAULT NULL COMMENT '更新时间',
+  `create_time` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间',
+  PRIMARY KEY (`key`, `database_id`)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COMMENT='元数据属性信息'
+
+drop table if exists `metadata_table_property`
+create  table if not exists `metadata_table_property` (
+  `key` varchar(255) NOT NULL COMMENT '属性key',
+  `value` varchar(255) NULL COMMENT '属性value',
+  `table_id` int(11) not null COMMENT '数据表名称',
+  `update_time` datetime DEFAULT NULL COMMENT '更新时间',
+  `create_time` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间',
+  PRIMARY KEY (`key`, `table_id`)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COMMENT='元数据属性信息'
+
+drop table if exists metadata_column
+create  table if not exists `metadata_column` (
+  `column_name` varchar(255) NOT NULL COMMENT '列名',
+  `column_type` varchar(255) NOT NULL COMMENT '列类型, 有Physical Metadata Computed WATERMARK ',
+  `data_type` varchar(255) NOT NULL COMMENT '数据类型',
+  `expr` varchar(255) NULL COMMENT '表达式',
+  `description` varchar(255) NOT NULL COMMENT '字段描述',
+  `table_id` int(11) not null COMMENT '数据表名称',
+  `primary` bit null comment '主键',
+  `update_time` datetime DEFAULT NULL COMMENT '更新时间',
+  `create_time` datetime NOT NULL DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间',
+  PRIMARY KEY (`table_id`,`column_name`)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COMMENT='数据列信息'
+
+drop table if exists `metadata_function`
+create  table if not exists `metadata_function` (
+  `id` int(11) not null AUTO_INCREMENT COMMENT '主键',
+  `function_name` varchar(255) NOT NULL COMMENT '名称',
+  `class_name` varchar(255) NOT null comment '类名',
+  `database_id` int(11) not null COMMENT '数据库主键',
+  `function_language` varchar(255) null comment'UDF语言',
+  `update_time` datetime DEFAULT NULL COMMENT '更新时间',
+  `create_time` datetime NULL DEFAULT CURRENT_TIMESTAMP COMMENT '创建时间',
+  PRIMARY KEY (`id`)
+) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COMMENT='UDF信息'
\ No newline at end of file

dlink-catalog/dlink-catalog-mysql/dlink-catalog-mysql-1.14/src/test/java/com/dlink/flink/catalog/DlinkMysqlCatalogTest.java

+/*
+
+#     __                        
+#    /  |  ____ ___  _          
+#   / / | / __//   // / /       
+#  /_/`_|/_/  / /_//___/        
+create @ 2022/7/9                                
+*/
+package com.dlink.flink.catalog;
+import org.apache.flink.table.api.EnvironmentSettings;
+import org.apache.flink.table.api.TableEnvironment;
+import org.junit.Before;
+import org.junit.Test;
+
+import static org.apache.flink.table.api.config.ExecutionConfigOptions.TABLE_EXEC_RESOURCE_DEFAULT_PARALLELISM;
+
+public class DlinkMysqlCatalogTest {
+
+    protected static String url;
+    protected static DlinkMysqlCatalog catalog;
+
+    protected static final String TEST_CATALOG_NAME = "mysql-catalog";
+    protected static final String TEST_USERNAME = "flink_metastore";
+    protected static final String TEST_PWD = "flink_metastore";
+
+    private TableEnvironment tableEnv;
+
+    @Before
+    public void setup(){
+
+        url = "jdbc:mysql://localhost:3306/flink_metastore?useUnicode=true&characterEncoding=utf8&serverTimezone=UTC";
+
+        catalog =
+                new DlinkMysqlCatalog(
+                        TEST_CATALOG_NAME,
+                        url,
+                        TEST_USERNAME,
+                        TEST_PWD);
+
+        this.tableEnv = TableEnvironment.create(EnvironmentSettings.inStreamingMode());
+        tableEnv.getConfig()
+                .getConfiguration()
+                .setInteger(TABLE_EXEC_RESOURCE_DEFAULT_PARALLELISM.key(), 1);
+
+    }
+
+    @Test
+    public void testSqlCatalog(){
+        String createSql = "create catalog myCatalog \n" +
+                " with('type'='dlink_mysql_catalog',\n" +
+                " 'mysql-catalog-username'='flink_metastore',\n" +
+                " 'mysql-catalog-password'='flink_metastore',\n" +
+                " 'mysql-catalog-url'='jdbc:mysql://localhost:3306/" +
+                "flink_metastore?useUnicode=true&characterEncoding=utf8&serverTimezone=UTC')";
+        tableEnv.executeSql(createSql);
+        tableEnv.executeSql("use catalog myCatalog");
+    }
+
+    @Test
+    public void test() {
+        // 这个 test 依赖个人环境，直接保留会导致打包不通过。但是展示了用法。
+        /*//1\. 获取上下文环境 table的环境
+
+        // use mysql-catalog
+        tableEnv.registerCatalog(DlinkMysqlCatalogFactoryOptions.IDENTIFIER, catalog);
+        tableEnv.useCatalog(DlinkMysqlCatalogFactoryOptions.IDENTIFIER);
+
+        //2\. 读取score.csv
+
+        String csvFile = "D:\\code\\test\\mycatalog\\src\\test\\resources\\score.csv";
+        String createTable = "CREATE TABLE IF NOT EXISTS player_data\n" +
+                "( season varchar,\n" +
+                "  player varchar,\n" +
+                "  play_num varchar,\n" +
+                "  first_court int,\n" +
+                "  `time` double,\n" +
+                "  assists double,\n" +
+                "  steals double,\n" +
+                "  blocks double,\n" +
+                "  scores double\n" +
+                ") WITH ( \n" +
+                "    'connector' = 'filesystem',\n" +
+                "    'path' = '" + csvFile + " ',\n" +
+                "    'format' = 'csv'\n" +
+                ")";
+
+        tableEnv.executeSql(createTable);
+
+        String createView= "CREATE VIEW IF NOT EXISTS test_view " +
+                " (player, play_num" +
+                " ,sumaabb)" +
+                " COMMENT 'test view' " +
+                " AS SELECT player, play_num, assists + steals as sumaabb FROM player_data";
+
+        tableEnv.executeSql(createView);
+
+        String createSinkTable = "CREATE TABLE IF NOT EXISTS mysql_player_from_view\n" +
+                "( " +
+                "  player varchar,\n" +
+                "  play_num varchar,\n" +
+                "  sumaabb double\n" +
+                ") WITH ( \n" +
+                "    'connector' = 'jdbc',\n" +
+                "    'url' = 'jdbc:mysql://localhost:3306/a01_rep_db',\n" +
+                "    'table-name' = 'mysql_player_from_view',\n" +
+                "    'username' = 'root',\n" +
+                "    'password' = '123456'\n" +
+                ")";
+
+
+
+        tableEnv.executeSql(createSinkTable);
+        tableEnv.executeSql("Insert into mysql_player_from_view\n" +
+                "SELECT \n" +
+                "player ,\n" +
+                "  play_num ,\n" +
+                "  sumaabb \n" +
+                "FROM test_view");
+
+        List<Row> results =
+                CollectionUtil.iteratorToList(
+                        tableEnv.sqlQuery("select * from mysql_player_from_view")
+                                .execute()
+                                .collect());
+
+        List<Row> tresults =
+                CollectionUtil.iteratorToList(
+                        tableEnv.sqlQuery("select * from test_view")
+                                .execute()
+                                .collect());
+
+        List<Row> presults =
+                CollectionUtil.iteratorToList(
+                        tableEnv.sqlQuery("select * from player_data")
+                                .execute()
+                                .collect());
+         */
+    }
+}

dlink-catalog/dlink-catalog-mysql/dlink-catalog-mysql-1.14/src/test/java/com/dlink/flink/catalog/com/dlink/flink/catalog/factory/DlinkMysqlCatalogFactoryTest.java

+/*
+
+#     __                        
+#    /  |  ____ ___  _          
+#   / / | / __//   // / /       
+#  /_/`_|/_/  / /_//___/        
+create @ 2022/7/9                                
+*/
+package com.dlink.flink.catalog.com.dlink.flink.catalog.factory;
+
+import com.dlink.flink.catalog.DlinkMysqlCatalog;
+import com.dlink.flink.catalog.factory.DlinkMysqlCatalogFactoryOptions;
+import org.apache.flink.table.catalog.Catalog;
+import org.apache.flink.table.catalog.CommonCatalogOptions;
+import org.apache.flink.table.factories.FactoryUtil;
+import org.junit.BeforeClass;
+import org.junit.Test;
+
+import java.sql.SQLException;
+import java.util.HashMap;
+import java.util.Map;
+
+import static org.junit.Assert.assertEquals;
+import static org.junit.Assert.assertTrue;
+
+public class DlinkMysqlCatalogFactoryTest {
+
+    protected static String url;
+    protected static DlinkMysqlCatalog catalog;
+
+    protected static final String TEST_CATALOG_NAME = "mysql-catalog";
+    protected static final String TEST_USERNAME = "flink_metastore";
+    protected static final String TEST_PWD = "flink_metastore";
+
+    @BeforeClass
+    public static void setup() throws SQLException {
+        url = "jdbc:mysql://localhost:3306/flink_metastore?useUnicode=true&characterEncoding=utf8&serverTimezone=UTC";
+
+        catalog =
+                new DlinkMysqlCatalog(
+                        TEST_CATALOG_NAME,
+                        TEST_USERNAME,
+                        TEST_PWD,
+                        url);
+    }
+
+    @Test
+    public void test() {
+        final Map<String, String> options = new HashMap<>();
+        options.put(CommonCatalogOptions.CATALOG_TYPE.key(), DlinkMysqlCatalogFactoryOptions.IDENTIFIER);
+        options.put(DlinkMysqlCatalogFactoryOptions.USERNAME.key(), TEST_USERNAME);
+        options.put(DlinkMysqlCatalogFactoryOptions.PASSWORD.key(), TEST_PWD);
+        options.put(DlinkMysqlCatalogFactoryOptions.URL.key(), url);
+
+        final Catalog actualCatalog =
+                FactoryUtil.createCatalog(
+                        TEST_CATALOG_NAME,
+                        options,
+                        null,
+                        Thread.currentThread().getContextClassLoader());
+
+        checkEquals(catalog, (DlinkMysqlCatalog) actualCatalog);
+
+        assertTrue( actualCatalog instanceof DlinkMysqlCatalog);
+    }
+
+    private static void checkEquals(DlinkMysqlCatalog c1, DlinkMysqlCatalog c2) {
+        assertEquals(c1.getName(), c2.getName());
+        assertEquals(c1.getDefaultDatabase(), c2.getDefaultDatabase());
+        assertEquals(c1.getUser(), c2.getUser());
+        assertEquals(c1.getPwd(), c2.getPwd());
+        assertEquals(c1.getUrl(), c2.getUrl());
+    }
+}

dlink-catalog/dlink-catalog-mysql/pom.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <parent>
+        <artifactId>dlink-catalog</artifactId>
+        <groupId>com.dlink</groupId>
+        <version>0.6.6-SNAPSHOT</version>
+    </parent>
+    <modelVersion>4.0.0</modelVersion>
+
+    <artifactId>dlink-catalog-mysql</artifactId>
+    <packaging>pom</packaging>
+    <modules>
+        <module>dlink-catalog-mysql-1.14</module>
+    </modules>
+
+    <properties>
+        <maven.compiler.source>8</maven.compiler.source>
+        <maven.compiler.target>8</maven.compiler.target>
+    </properties>
+
+</project>
\ No newline at end of file

dlink-catalog/pom.xml

+<?xml version="1.0" encoding="UTF-8"?>
+<project xmlns="http://maven.apache.org/POM/4.0.0"
+         xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance"
+         xsi:schemaLocation="http://maven.apache.org/POM/4.0.0 http://maven.apache.org/xsd/maven-4.0.0.xsd">
+    <parent>
+        <artifactId>dlink</artifactId>
+        <groupId>com.dlink</groupId>
+        <version>0.6.6-SNAPSHOT</version>
+    </parent>
+
+    <modelVersion>4.0.0</modelVersion>
+    <packaging>pom</packaging>
+    <artifactId>dlink-catalog</artifactId>
+
+    <modules>
+        <module>dlink-catalog-mysql</module>
+    </modules>
+</project>
\ No newline at end of file

pom.xml

@@ -26,6 +26,7 @@
         <module>dlink-web</module>
         <module>dlink-admin</module>
         <module>dlink-assembly</module>
+        <module>dlink-catalog</module>
     </modules>
 
     <properties>