com.hazelcast.org.apache.calcite.adapter.enumerable.WinAggResultContext 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 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 com.hazelcast.org.apache.calcite.adapter.enumerable;
import com.hazelcast.org.apache.calcite.linq4j.tree.Expression;
import com.hazelcast.org.apache.calcite.rex.RexNode;
import java.util.List;
/**
* Information for a call to
* {@link AggImplementor#implementResult(AggContext, AggResultContext)}.
*
* Typically, the aggregation implementation will convert
* {@link #accumulator()} to the resulting value of the aggregation. The
* implementation MUST NOT destroy the contents of {@link #accumulator()}.
*/
public interface WinAggResultContext extends AggResultContext,
WinAggFrameResultContext {
/**
* Returns {@link com.hazelcast.org.apache.calcite.rex.RexNode} representation of arguments.
* This can be useful for manual translation of required arguments with
* different {@link NullPolicy}.
* @return {@link com.hazelcast.org.apache.calcite.rex.RexNode} representation of arguments
*/
List rexArguments();
/**
* Returns Linq4j form of arguments.
* The resulting value is equivalent to
* {@code rowTranslator().translateList(rexArguments())}.
* This is handy if you need just operate on argument.
* @param rowIndex index of the requested row. The index must be in range
* of partition's startIndex and endIndex.
* @return Linq4j form of arguments of the particular row
*/
List arguments(Expression rowIndex);
}