| /* |
| * 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.ignite.internal.processors.query.calcite.exec; |
| |
| import org.apache.calcite.util.ImmutableBitSet; |
| import org.apache.calcite.util.ImmutableIntList; |
| import org.apache.ignite.IgniteCheckedException; |
| import org.apache.ignite.IgniteException; |
| import org.apache.ignite.internal.cache.query.index.sorted.IndexRow; |
| import org.apache.ignite.internal.cache.query.index.sorted.inline.IndexQueryContext; |
| import org.apache.ignite.internal.cache.query.index.sorted.inline.InlineIndexImpl; |
| import org.apache.ignite.internal.processors.query.calcite.schema.CacheTableDescriptor; |
| import org.apache.ignite.internal.util.lang.GridCursor; |
| import org.jetbrains.annotations.Nullable; |
| |
| /** |
| * Takes only first or last index value excluding nulls. |
| */ |
| public class IndexFirstLastScan<Row> extends IndexScan<Row> { |
| /** |
| * @param first {@code True} to take first index value. {@code False} to take last value. |
| * @param ectx Execution context. |
| * @param desc Table descriptor. |
| * @param idx Physical index. |
| * @param idxFieldMapping Mapping from index keys to row fields. |
| * @param parts Mapping from index keys to row fields. |
| * @param requiredColumns Required columns. |
| */ |
| public IndexFirstLastScan( |
| boolean first, |
| ExecutionContext<Row> ectx, |
| CacheTableDescriptor desc, |
| InlineIndexImpl idx, |
| ImmutableIntList idxFieldMapping, |
| int[] parts, |
| @Nullable ImmutableBitSet requiredColumns |
| ) { |
| super(ectx, desc, new FirstLastIndexWrapper(idx, first), idxFieldMapping, parts, null, requiredColumns); |
| } |
| |
| /** {@inheritDoc} */ |
| @Override protected IndexQueryContext indexQueryContext() { |
| IndexQueryContext res = super.indexQueryContext(); |
| |
| return new IndexQueryContext( |
| res.cacheFilter(), |
| createNotNullRowFilter(idx, true), |
| res.mvccSnapshot() |
| ); |
| } |
| |
| /** */ |
| private static class FirstLastIndexWrapper extends IndexScan.TreeIndexWrapper { |
| /** */ |
| private final boolean first; |
| |
| /** |
| * @param idx Index |
| * @param first {@code True} to take first index value. {@code False} to take last value. |
| */ |
| protected FirstLastIndexWrapper(InlineIndexImpl idx, boolean first) { |
| super(idx); |
| this.first = first; |
| } |
| |
| /** {@inheritDoc} */ |
| @Override public GridCursor<IndexRow> find( |
| IndexRow lower, |
| IndexRow upper, |
| boolean lowerInclude, |
| boolean upperInclude, |
| IndexQueryContext qctx |
| ) { |
| assert lower == null && upper == null; |
| assert lowerInclude && upperInclude; |
| |
| try { |
| return idx.findFirstOrLast(qctx, first); |
| } |
| catch (IgniteCheckedException e) { |
| throw new IgniteException("Failed to take " + (first ? "first" : "last") + " not-null index value.", e); |
| } |
| } |
| } |
| } |