/*
* 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.apache.ignite.internal.processors.query.h2.opt;
/**
* Defines set of distributed join modes.
*/
public enum DistributedJoinMode {
/**
* Distributed joins is disabled. Local joins will be performed instead.
*/
OFF,
/**
* Distributed joins is enabled within local node only.
*
* NOTE: This mode is used with segmented indices for local sql queries.
* As in this case we need to make distributed join across local index segments
* and prevent range-queries to other nodes.
*/
LOCAL_ONLY,
/**
* Distributed joins is enabled.
*/
ON;
/**
* @param isLocal Query local flag.
* @param distributedJoins Query distributed joins flag.
* @return DistributedJoinMode for the query.
*/
public static DistributedJoinMode distributedJoinMode(boolean isLocal, boolean distributedJoins) {
return distributedJoins ? (isLocal ? LOCAL_ONLY : ON) : OFF;
}
}