phoenix-core/src/main/java/org/apache/phoenix/execute/DegenerateQueryPlan.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.phoenix.execute;

import java.sql.SQLException;
import java.util.Collections;
import java.util.List;

import org.apache.hadoop.hbase.client.Scan;
import org.apache.phoenix.compile.GroupByCompiler.GroupBy;
import org.apache.phoenix.compile.OrderByCompiler.OrderBy;
import org.apache.phoenix.compile.RowProjector;
import org.apache.phoenix.compile.ScanRanges;
import org.apache.phoenix.compile.StatementContext;
import org.apache.phoenix.iterate.ParallelScanGrouper;
import org.apache.phoenix.iterate.ResultIterator;
import org.apache.phoenix.jdbc.PhoenixParameterMetaData;
import org.apache.phoenix.parse.FilterableStatement;
import org.apache.phoenix.query.KeyRange;
import org.apache.phoenix.schema.TableRef;

public class DegenerateQueryPlan extends BaseQueryPlan {

    public DegenerateQueryPlan(StatementContext context, FilterableStatement statement, TableRef table) {
        super(context, statement, table, RowProjector.EMPTY_PROJECTOR, PhoenixParameterMetaData.EMPTY_PARAMETER_META_DATA, null, OrderBy.EMPTY_ORDER_BY, GroupBy.EMPTY_GROUP_BY, null, null);
        context.setScanRanges(ScanRanges.NOTHING);
    }

    @Override
    public List<KeyRange> getSplits() {
        return Collections.emptyList();
    }

    @Override
    public List<List<Scan>> getScans() {
        return Collections.emptyList();
    }

    @Override
    protected ResultIterator newIterator(ParallelScanGrouper scanGrouper) throws SQLException {
        return null;
    }

    @Override
    public boolean useRoundRobinIterator() {
        return false;
    }

}