| /* |
| * 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.plan.rewrite.rules; |
| |
| import com.google.gson.annotations.Expose; |
| import org.apache.tajo.catalog.IndexDesc; |
| import org.apache.tajo.catalog.Schema; |
| import org.apache.tajo.catalog.SchemaFactory; |
| import org.apache.tajo.catalog.SortSpec; |
| import org.apache.tajo.catalog.statistics.TableStats; |
| import org.apache.tajo.common.ProtoObject; |
| import org.apache.tajo.datum.Datum; |
| import org.apache.tajo.plan.serder.EvalNodeDeserializer; |
| import org.apache.tajo.plan.serder.EvalNodeSerializer; |
| import org.apache.tajo.plan.serder.PlanProto.SimplePredicateProto; |
| |
| import java.net.URI; |
| |
| public class IndexScanInfo extends AccessPathInfo { |
| |
| /** |
| * Simple predicate represents an equal eval expression which consists of |
| * a column and a value. |
| */ |
| // TODO: extend to represent more complex expressions |
| public static class SimplePredicate implements ProtoObject<SimplePredicateProto> { |
| @Expose private SortSpec keySortSpec; |
| @Expose private Datum value; |
| |
| public SimplePredicate(SortSpec keySortSpec, Datum value) { |
| this.keySortSpec = keySortSpec; |
| this.value = value; |
| } |
| |
| public SimplePredicate(SimplePredicateProto proto) { |
| keySortSpec = new SortSpec(proto.getKeySortSpec()); |
| value = EvalNodeDeserializer.deserialize(proto.getValue()); |
| } |
| |
| public SortSpec getKeySortSpec() { |
| return keySortSpec; |
| } |
| |
| public Datum getValue() { |
| return value; |
| } |
| |
| @Override |
| public boolean equals(Object o) { |
| if (o instanceof SimplePredicate) { |
| SimplePredicate other = (SimplePredicate) o; |
| return this.keySortSpec.equals(other.keySortSpec) && this.value.equals(other.value); |
| } else { |
| return false; |
| } |
| } |
| |
| @Override |
| public Object clone() throws CloneNotSupportedException { |
| SimplePredicate clone = new SimplePredicate(this.keySortSpec, this.value); |
| return clone; |
| } |
| |
| @Override |
| public SimplePredicateProto getProto() { |
| SimplePredicateProto.Builder builder = SimplePredicateProto.newBuilder(); |
| builder.setKeySortSpec(keySortSpec.getProto()); |
| builder.setValue(EvalNodeSerializer.serialize(value)); |
| return builder.build(); |
| } |
| } |
| |
| private final URI indexPath; |
| private final Schema keySchema; |
| private final SimplePredicate[] predicates; |
| |
| public IndexScanInfo(TableStats tableStats, IndexDesc indexDesc, SimplePredicate[] predicates) { |
| super(ScanTypeControl.INDEX_SCAN, tableStats); |
| this.indexPath = indexDesc.getIndexPath(); |
| keySchema = SchemaFactory.newV1(); |
| this.predicates = predicates; |
| for (SimplePredicate predicate : predicates) { |
| keySchema.addColumn(predicate.getKeySortSpec().getSortKey()); |
| } |
| } |
| |
| public URI getIndexPath() { |
| return indexPath; |
| } |
| |
| public Schema getKeySchema() { |
| return keySchema; |
| } |
| |
| public SimplePredicate[] getPredicates() { |
| return predicates; |
| } |
| } |