com.hazelcast.org.apache.calcite.plan.RelOptSchemaWithSampling Maven / Gradle / Ivy
/*
* 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 com.hazelcast.com.liance with
* the License. You may obtain a copy of the License at
*
* http://www.apache.com.hazelcast.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.hazelcast.org.apache.calcite.plan;
import java.util.List;
/**
* Extension to {@link RelOptSchema} with support for sample data-sets.
*
* @see RelOptSchema
*/
public interface RelOptSchemaWithSampling extends RelOptSchema {
//~ Methods ----------------------------------------------------------------
/**
* Retrieves a {@link RelOptTable} based upon a member access, using a
* sample dataset if it exists.
*
* @param names Compound name of table
* @param datasetName Name of sample dataset to substitute, if it exists;
* null to not look for a sample
* @param usedDataset Output parameter which is set to true if a sample
* dataset is found; may be null
* @return Table, or null if not found
*/
RelOptTable getTableForMember(
List names,
String datasetName,
boolean[] usedDataset);
}