io.trino.sql.planner.optimizations.WindowNodeUtil Maven / Gradle / Ivy
/*
* Licensed 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 io.trino.sql.planner.optimizations;
import io.trino.sql.planner.SymbolsExtractor;
import io.trino.sql.planner.plan.WindowNode;
import java.util.Collection;
public final class WindowNodeUtil
{
private WindowNodeUtil() {}
public static boolean dependsOn(WindowNode parent, WindowNode child)
{
return parent.getPartitionBy().stream().anyMatch(child.getCreatedSymbols()::contains)
|| (parent.getOrderingScheme().isPresent() && parent.getOrderingScheme().get().getOrderBy().stream().anyMatch(child.getCreatedSymbols()::contains))
|| parent.getWindowFunctions().values().stream()
.map(SymbolsExtractor::extractUnique)
.flatMap(Collection::stream)
.anyMatch(child.getCreatedSymbols()::contains);
}
}