[
https://issues.apache.org/jira/browse/TAJO-774?page=com.atlassian.jira.plugin.system.issuetabpanels:comment-tabpanel&focusedCommentId=14054785#comment-14054785
]
ASF GitHub Bot commented on TAJO-774:
-------------------------------------
Github user hyunsik commented on a diff in the pull request:
https://github.com/apache/tajo/pull/13#discussion_r14645200
--- Diff:
tajo-core/src/main/java/org/apache/tajo/engine/planner/physical/WindowAggExec.java
---
@@ -0,0 +1,340 @@
+/**
+ * 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.tajo.engine.planner.physical;
+
+import com.google.common.collect.Lists;
+import org.apache.tajo.catalog.Column;
+import org.apache.tajo.catalog.Schema;
+import org.apache.tajo.catalog.SortSpec;
+import org.apache.tajo.datum.Datum;
+import org.apache.tajo.engine.eval.WindowFunctionEval;
+import org.apache.tajo.engine.function.FunctionContext;
+import org.apache.tajo.engine.planner.logical.WindowAggNode;
+import org.apache.tajo.engine.planner.logical.WindowSpec;
+import org.apache.tajo.storage.Tuple;
+import org.apache.tajo.storage.TupleComparator;
+import org.apache.tajo.storage.VTuple;
+import org.apache.tajo.worker.TaskAttemptContext;
+
+import java.io.IOException;
+import java.util.ArrayList;
+import java.util.Collections;
+import java.util.Iterator;
+import java.util.List;
+
+/**
+ * The sort-based window aggregation operator
+ */
+public class WindowAggExec extends UnaryPhysicalExec {
+ // plan information
+ protected final int outputColumnNum;
+ protected final int nonFunctionColumnNum;
+ protected final int nonFunctionColumns[];
+
+ protected final int functionNum;
+ protected final WindowFunctionEval functions[];
+
+ protected Schema schemaForOrderBy;
+ protected int sortKeyColumns[];
+ protected final boolean hasPartitionKeys;
+ protected final int partitionKeyNum;
+ protected final int partitionKeyIds[];
+
+ // for evaluation
+ protected FunctionContext contexts [];
+ protected Tuple lastKey = null;
+ protected boolean noMoreTuples = false;
+ private boolean [] orderedFuncFlags;
+ private boolean [] aggFuncFlags;
+ private boolean [] windowFuncFlags;
+ private boolean [] endUnboundedFollowingFlags;
+ private boolean [] endCurrentRowFlags;
+
+ private boolean endCurrentRow = false;
--- End diff --
Window function is still ongoing work. They will be used in the next work.
> Implement logical plan part and physical executor for window function.
> ----------------------------------------------------------------------
>
> Key: TAJO-774
> URL: https://issues.apache.org/jira/browse/TAJO-774
> Project: Tajo
> Issue Type: Sub-task
> Components: planner/optimizer
> Reporter: Hyunsik Choi
> Assignee: Hyunsik Choi
> Fix For: 0.9.0
>
>
> See the title. The main objective of this issue is to implement the logical
> planning part for window function support.
--
This message was sent by Atlassian JIRA
(v6.2#6252)
