/*
* Licensed to Crate under one or more contributor license agreements.
* See the NOTICE file distributed with this work for additional
* information regarding copyright ownership. Crate 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.
*
* However, if you have executed another commercial license agreement
* with Crate these terms will supersede the license and you may use the
* software solely pursuant to the terms of the relevant commercial
* agreement.
*/
package io.crate.planner.consumer;
/**
* Component to help make decisions in the planner on how/if fetch-phases should be planned.
*
* This is mostly relevant for nested-relations where the plan being created will also contain one or more sub-plans.
* A planner component for a parent-relation can set a FetchMode on the {@link ConsumerContext} to influence the planning of
* child-relations.
*/
public enum FetchMode {
NEVER,
NO_PROPAGATION,
WITH_PROPAGATION
}