| /* |
| * 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) |
| throws SchemaChangeException; |
| |
| /** |
| * 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) |
| throws SchemaChangeException; |
| } |