/*
* 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.eigenbase.relopt;
import java.util.List;
import org.eigenbase.reltype.*;
/**
* A <code>RelOptSchema</code> is a set of {@link RelOptTable} objects.
*/
public interface RelOptSchema {
//~ Methods ----------------------------------------------------------------
/**
* Retrieves a {@link RelOptTable} based upon a member access.
*
* <p>For example, the Saffron expression <code>salesSchema.emps</code>
* would be resolved using a call to <code>salesSchema.getTableForMember(new
* String[]{"emps" })</code>.</p>
*
* <p>Note that name.length is only greater than 1 for queries originating
* from JDBC.</p>
*
* @param names Qualified name
*/
RelOptTable getTableForMember(List<String> names);
/**
* Returns the {@link RelDataTypeFactory type factory} used to generate
* types for this schema.
*/
RelDataTypeFactory getTypeFactory();
/**
* Registers all of the rules supported by this schema. Only called by
* {@link RelOptPlanner#registerSchema}.
*/
void registerRules(RelOptPlanner planner) throws Exception;
}
// End RelOptSchema.java