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[FLINK-34572] Support OceanBase Jdbc Catalog
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164
...in/java/org/apache/flink/connector/jdbc/databases/oceanbase/catalog/OceanBaseCatalog.java
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| /* | ||
| * 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. | ||
| */ | ||
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| package org.apache.flink.connector.jdbc.databases.oceanbase.catalog; | ||
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| import org.apache.flink.connector.jdbc.catalog.AbstractJdbcCatalog; | ||
| import org.apache.flink.connector.jdbc.dialect.JdbcDialectTypeMapper; | ||
| import org.apache.flink.table.catalog.ObjectPath; | ||
| import org.apache.flink.table.catalog.UniqueConstraint; | ||
| import org.apache.flink.table.catalog.exceptions.CatalogException; | ||
| import org.apache.flink.table.catalog.exceptions.DatabaseNotExistException; | ||
| import org.apache.flink.table.types.DataType; | ||
| import org.apache.flink.util.Preconditions; | ||
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| import org.apache.commons.lang3.StringUtils; | ||
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| import java.sql.DatabaseMetaData; | ||
| import java.sql.ResultSetMetaData; | ||
| import java.sql.SQLException; | ||
| import java.util.HashSet; | ||
| import java.util.List; | ||
| import java.util.Map; | ||
| import java.util.Optional; | ||
| import java.util.Properties; | ||
| import java.util.Set; | ||
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| import static org.apache.flink.connector.jdbc.table.JdbcConnectorOptions.COMPATIBLE_MODE; | ||
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| /** Catalog for OceanBase. */ | ||
| public class OceanBaseCatalog extends AbstractJdbcCatalog { | ||
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| private static final Set<String> builtinDatabases = | ||
| new HashSet<String>() { | ||
| { | ||
| add("__public"); | ||
| add("information_schema"); | ||
| add("mysql"); | ||
| add("oceanbase"); | ||
| add("LBACSYS"); | ||
| add("ORAAUDITOR"); | ||
| } | ||
| }; | ||
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| private final String compatibleMode; | ||
| private final JdbcDialectTypeMapper dialectTypeMapper; | ||
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| public OceanBaseCatalog( | ||
| ClassLoader userClassLoader, | ||
| String catalogName, | ||
| String compatibleMode, | ||
| String defaultDatabase, | ||
| String baseUrl, | ||
| Properties connectionProperties) { | ||
| super(userClassLoader, catalogName, defaultDatabase, baseUrl, connectionProperties); | ||
| this.compatibleMode = compatibleMode; | ||
| this.dialectTypeMapper = new OceanBaseTypeMapper(compatibleMode); | ||
| } | ||
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| private boolean isMySQLMode() { | ||
| return "mysql".equalsIgnoreCase(compatibleMode); | ||
| } | ||
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| private String getConnUrl() { | ||
| return isMySQLMode() ? baseUrl : defaultUrl; | ||
| } | ||
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| @Override | ||
| public List<String> listDatabases() throws CatalogException { | ||
| String query = | ||
| isMySQLMode() | ||
| ? "SELECT `SCHEMA_NAME` FROM `INFORMATION_SCHEMA`.`SCHEMATA`" | ||
| : "SELECT USERNAME FROM ALL_USERS"; | ||
| return extractColumnValuesBySQL( | ||
| getConnUrl(), query, 1, dbName -> !builtinDatabases.contains(dbName)); | ||
| } | ||
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| @Override | ||
| public List<String> listTables(String databaseName) | ||
| throws DatabaseNotExistException, CatalogException { | ||
| Preconditions.checkState( | ||
| StringUtils.isNotBlank(databaseName), "Database name must not be blank."); | ||
| if (!databaseExists(databaseName)) { | ||
| throw new DatabaseNotExistException(getName(), databaseName); | ||
| } | ||
| String sql = | ||
| isMySQLMode() | ||
| ? "SELECT TABLE_NAME FROM information_schema.`TABLES` WHERE TABLE_SCHEMA = ?" | ||
| : "SELECT TABLE_NAME FROM ALL_TABLES WHERE OWNER = ?"; | ||
| return extractColumnValuesBySQL(getConnUrl(), sql, 1, null, databaseName); | ||
| } | ||
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| @Override | ||
| public boolean tableExists(ObjectPath tablePath) throws CatalogException { | ||
| String query = | ||
| isMySQLMode() | ||
| ? "SELECT TABLE_NAME FROM information_schema.`TABLES` " | ||
| + "WHERE TABLE_SCHEMA = ? and TABLE_NAME = ?" | ||
| : "SELECT TABLE_NAME FROM ALL_TABLES " | ||
| + "WHERE OWNER = ? and TABLE_NAME = ?"; | ||
| return !extractColumnValuesBySQL( | ||
| getConnUrl(), | ||
| query, | ||
| 1, | ||
| null, | ||
| tablePath.getDatabaseName(), | ||
| tablePath.getObjectName()) | ||
| .isEmpty(); | ||
| } | ||
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| @Override | ||
| protected Optional<UniqueConstraint> getPrimaryKey( | ||
| DatabaseMetaData metaData, String database, String schema, String table) | ||
| throws SQLException { | ||
| if (isMySQLMode()) { | ||
| return super.getPrimaryKey(metaData, database, null, table); | ||
| } else { | ||
| return super.getPrimaryKey(metaData, null, database, table); | ||
| } | ||
| } | ||
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| @Override | ||
| protected Map<String, String> getOptions(ObjectPath tablePath) { | ||
| Map<String, String> options = super.getOptions(tablePath); | ||
| options.put(COMPATIBLE_MODE.key(), compatibleMode); | ||
| return options; | ||
| } | ||
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| /** Converts OceanBase type to Flink {@link DataType}. */ | ||
| @Override | ||
| protected DataType fromJDBCType(ObjectPath tablePath, ResultSetMetaData metadata, int colIndex) | ||
| throws SQLException { | ||
| return dialectTypeMapper.mapping(tablePath, metadata, colIndex); | ||
| } | ||
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| @Override | ||
| protected String getTableName(ObjectPath tablePath) { | ||
| return tablePath.getObjectName(); | ||
| } | ||
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| @Override | ||
| protected String getSchemaName(ObjectPath tablePath) { | ||
| return null; | ||
| } | ||
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| @Override | ||
| protected String getSchemaTableName(ObjectPath tablePath) { | ||
| return tablePath.getObjectName(); | ||
| } | ||
| } |
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