| /* |
| * 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.gearpump.sql.rel; |
| |
| import org.apache.calcite.plan.RelOptCluster; |
| import org.apache.calcite.plan.RelTraitSet; |
| import org.apache.calcite.rel.RelCollation; |
| import org.apache.calcite.rel.RelCollationImpl; |
| import org.apache.calcite.rel.RelFieldCollation; |
| import org.apache.calcite.rel.RelNode; |
| import org.apache.calcite.rel.core.Sort; |
| import org.apache.calcite.rex.RexInputRef; |
| import org.apache.calcite.rex.RexLiteral; |
| import org.apache.calcite.rex.RexNode; |
| import org.apache.gearpump.streaming.dsl.javaapi.JavaStream; |
| import org.apache.gearpump.streaming.dsl.javaapi.JavaStreamApp; |
| import scala.Tuple2; |
| |
| import java.math.BigDecimal; |
| import java.util.ArrayList; |
| import java.util.List; |
| |
| public class GearSortRel extends Sort implements GearRelNode { |
| |
| private List<Integer> fieldIndices = new ArrayList<>(); |
| private List<Boolean> orientation = new ArrayList<>(); |
| private List<Boolean> nullsFirst = new ArrayList<>(); |
| |
| private int startIndex = 0; |
| private int count; |
| |
| public GearSortRel(RelOptCluster cluster, RelTraitSet traits, RelNode child, RelCollation collation, |
| RexNode offset, RexNode fetch) { |
| super(cluster, traits, child, collation, offset, fetch); |
| |
| List<RexNode> fieldExps = getChildExps(); |
| RelCollationImpl collationImpl = (RelCollationImpl) collation; |
| List<RelFieldCollation> collations = collationImpl.getFieldCollations(); |
| for (int i = 0; i < fieldExps.size(); i++) { |
| RexNode fieldExp = fieldExps.get(i); |
| RexInputRef inputRef = (RexInputRef) fieldExp; |
| fieldIndices.add(inputRef.getIndex()); |
| orientation.add(collations.get(i).getDirection() == RelFieldCollation.Direction.ASCENDING); |
| |
| RelFieldCollation.NullDirection rawNullDirection = collations.get(i).nullDirection; |
| if (rawNullDirection == RelFieldCollation.NullDirection.UNSPECIFIED) { |
| rawNullDirection = collations.get(i).getDirection().defaultNullDirection(); |
| } |
| nullsFirst.add(rawNullDirection == RelFieldCollation.NullDirection.FIRST); |
| } |
| |
| if (fetch == null) { |
| throw new UnsupportedOperationException("ORDER BY without a LIMIT is not supported!"); |
| } |
| |
| RexLiteral fetchLiteral = (RexLiteral) fetch; |
| count = ((BigDecimal) fetchLiteral.getValue()).intValue(); |
| |
| if (offset != null) { |
| RexLiteral offsetLiteral = (RexLiteral) offset; |
| startIndex = ((BigDecimal) offsetLiteral.getValue()).intValue(); |
| } |
| } |
| |
| @Override |
| public Sort copy(RelTraitSet traitSet, RelNode newInput, RelCollation newCollation, |
| RexNode offset, RexNode fetch) { |
| return new GearSortRel(getCluster(), traitSet, newInput, newCollation, offset, fetch); |
| } |
| |
| public static <T extends Number & Comparable> int numberCompare(T a, T b) { |
| return a.compareTo(b); |
| } |
| |
| @Override |
| public JavaStream<Tuple2<String, Integer>> buildGearPipeline(JavaStreamApp app, JavaStream<Tuple2<String, Integer>> javaStream) throws Exception { |
| return null; |
| } |
| } |