| /* |
| * 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 org.apache.hadoop.hbase.client.Scan; |
| import org.apache.phoenix.compile.ExplainPlan; |
| import org.apache.phoenix.compile.QueryPlan; |
| import org.apache.phoenix.compile.StatementContext; |
| import org.apache.phoenix.execute.visitor.QueryPlanVisitor; |
| import org.apache.phoenix.iterate.CursorResultIterator; |
| import org.apache.phoenix.iterate.LookAheadResultIterator; |
| import org.apache.phoenix.iterate.ParallelScanGrouper; |
| import org.apache.phoenix.iterate.ResultIterator; |
| |
| public class CursorFetchPlan extends DelegateQueryPlan { |
| |
| private CursorResultIterator resultIterator; |
| private int fetchSize; |
| private boolean isAggregate; |
| private String cursorName; |
| |
| public CursorFetchPlan(QueryPlan cursorQueryPlan,String cursorName) { |
| super(cursorQueryPlan); |
| this.isAggregate = delegate.getStatement().isAggregate() || delegate.getStatement().isDistinct(); |
| this.cursorName = cursorName; |
| } |
| |
| @Override |
| public ResultIterator iterator(ParallelScanGrouper scanGrouper, Scan scan) throws SQLException { |
| StatementContext context = delegate.getContext(); |
| if (resultIterator == null) { |
| context.getOverallQueryMetrics().startQuery(); |
| resultIterator = new CursorResultIterator(LookAheadResultIterator.wrap(delegate.iterator(scanGrouper, scan)),cursorName); |
| } |
| return resultIterator; |
| } |
| |
| @Override |
| public <T> T accept(QueryPlanVisitor<T> visitor) { |
| return visitor.visit(this); |
| } |
| |
| |
| @Override |
| public ExplainPlan getExplainPlan() throws SQLException { |
| return delegate.getExplainPlan(); |
| } |
| |
| public void setFetchSize(int fetchSize){ |
| this.fetchSize = fetchSize; |
| } |
| |
| public int getFetchSize() { |
| return fetchSize; |
| } |
| |
| public boolean isAggregate(){ |
| return this.isAggregate; |
| } |
| } |