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/**
* 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.drill.exec.physical.impl.window;
import org.apache.drill.common.exceptions.DrillException;
import org.apache.drill.exec.compile.TemplateClassDefinition;
import org.apache.drill.exec.exception.SchemaChangeException;
import org.apache.drill.exec.ops.OperatorContext;
import org.apache.drill.exec.physical.config.WindowPOP;
import org.apache.drill.exec.record.VectorAccessible;
import org.apache.drill.exec.record.VectorContainer;
import javax.inject.Named;
import java.util.List;
public interface WindowFramer {
TemplateClassDefinition<WindowFramer> NOFRAME_TEMPLATE_DEFINITION = new TemplateClassDefinition<>(WindowFramer.class, NoFrameSupportTemplate.class);
TemplateClassDefinition<WindowFramer> FRAME_TEMPLATE_DEFINITION = new TemplateClassDefinition<>(WindowFramer.class, FrameSupportTemplate.class);
void setup(final List<WindowDataBatch> batches, final VectorContainer container, final OperatorContext operatorContext,
final boolean requireFullPartition, final WindowPOP popConfig) throws SchemaChangeException;
/**
* process the inner batch and write the aggregated values in the container
* @throws DrillException
*/
void doWork() throws DrillException;
/**
* @return number rows processed in last batch
*/
int getOutputCount();
void cleanup();
/**
* compares two rows from different batches (can be the same), if they have the same value for the partition by
* expression
* @param b1Index index of first row
* @param b1 batch for first row
* @param b2Index index of second row
* @param b2 batch for second row
* @return true if the rows are in the same partition
*/
boolean isSamePartition(@Named("b1Index") int b1Index, @Named("b1") VectorAccessible b1,
@Named("b2Index") int b2Index, @Named("b2") VectorAccessible b2);
/**
* compares two rows from different batches (can be the same), if they have the same value for the order by
* expression
* @param b1Index index of first row
* @param b1 batch for first row
* @param b2Index index of second row
* @param b2 batch for second row
* @return true if the rows are in the same partition
*/
boolean isPeer(@Named("b1Index") int b1Index, @Named("b1") VectorAccessible b1,
@Named("b2Index") int b2Index, @Named("b2") VectorAccessible b2);
}
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