modules/indexing/src/main/java/org/apache/ignite/internal/processors/query/h2/database/H2TreeIndexBase.java

/*
 * 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.h2.database;

import java.util.HashSet;
import org.apache.ignite.internal.processors.query.h2.opt.GridH2IndexBase;
import org.apache.ignite.internal.processors.query.h2.opt.GridH2Table;
import org.h2.engine.Session;
import org.h2.index.IndexType;
import org.h2.result.SortOrder;
import org.h2.table.Column;
import org.h2.table.IndexColumn;
import org.h2.table.TableFilter;

/**
 * H2 tree index base.
 */
public abstract class H2TreeIndexBase extends GridH2IndexBase {
    /**
     * Constructor.
     *
     * @param tbl Table.
     */
    protected H2TreeIndexBase(GridH2Table tbl, String name, IndexColumn[] cols, IndexType type) {
        super(tbl, name, cols, type);
    }

    /**
     * @return Inline size.
     */
    public abstract int inlineSize();

    /** {@inheritDoc} */
    @Override public double getCost(Session ses, int[] masks, TableFilter[] filters, int filter, SortOrder sortOrder,
        HashSet<Column> allColumnsSet) {
        long rowCnt = getRowCountApproximation();

        double baseCost = getCostRangeIndex(ses, masks, rowCnt, filters, filter, sortOrder, false, allColumnsSet);

        int mul = getDistributedMultiplier(ses, filters, filter);

        return mul * baseCost;
    }

    /** {@inheritDoc} */
    @Override public boolean canGetFirstOrLast() {
        return true;
    }
}