001/*
002 * Licensed to the Apache Software Foundation (ASF) under one or more
003 * contributor license agreements.  See the NOTICE file distributed with
004 * this work for additional information regarding copyright ownership.
005 * The ASF licenses this file to you under the Apache License, Version 2.0
006 * (the "License"); you may not use this file except in compliance with
007 * the License.  You may obtain a copy of the License at
008 *
009 * http://www.apache.org/licenses/LICENSE-2.0
010 *
011 * Unless required by applicable law or agreed to in writing, software
012 * distributed under the License is distributed on an "AS IS" BASIS,
013 * WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
014 * See the License for the specific language governing permissions and
015 * limitations under the License.
016 */
017package gudusoft.gsqlparser.ext.calcite.catalog;
018
019import org.checkerframework.checker.nullness.qual.Nullable;
020
021import java.util.List;
022
023/**
024 * Represents a schema in a database catalog.
025 *
026 * <p>A schema is a namespace that contains tables, views, and other database objects.
027 *
028 * <p>This is a standalone version that can be used independently of Apache Calcite.
029 */
030public interface Schema {
031  /**
032   * Returns the name of the schema.
033   *
034   * @return Schema name
035   */
036  String getName();
037
038  /**
039   * Returns the catalog that this schema belongs to.
040   *
041   * @return Catalog
042   */
043  Catalog getCatalog();
044
045  /**
046   * Returns all tables in this schema.
047   *
048   * @return List of tables
049   */
050  List<Table> getTables();
051
052  /**
053   * Returns a table by name, or null if not found.
054   *
055   * @param tableName Table name (case-sensitive)
056   * @return Table, or null
057   */
058  @Nullable Table getTable(String tableName);
059
060  /**
061   * Returns all table names in this schema.
062   *
063   * @return List of table names
064   */
065  List<String> getTableNames();
066}