Github user mravi commented on a diff in the pull request:
https://github.com/apache/incubator-phoenix/pull/22#discussion_r10860193
--- Diff:
phoenix-pig/src/main/java/org/apache/phoenix/pig/hadoop/PhoenixRecordReader.java
---
@@ -0,0 +1,116 @@
+/*
+ * Copyright 2010 The Apache Software Foundation
+ *
+ * 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 maynot 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 applicablelaw 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.pig.hadoop;
+
+import java.io.IOException;
+import java.sql.SQLException;
+import java.util.List;
+
+import org.apache.phoenix.pig.PhoenixPigConfiguration;
+
+/**
+ *
+ * Describe your class here.
+ *
+ * @since 138
+ */
+public final class PhoenixRecordReader extends
RecordReader<NullWritable,PhoenixRecord>{
+
+ private static final Log LOG =
LogFactory.getLog(PhoenixRecordReader.class);
+ private NullWritable key = NullWritable.get();
+ private PhoenixRecord value = null;
+ private List<? extends ColumnProjector> projectedColumns;
+ private HTableInterface htable;
+ private ResultIterator resultIterator = null;
+ private ImmutableBytesWritable ptr = new ImmutableBytesWritable();
+
+ public PhoenixRecordReader(PhoenixPigConfiguration config) {
+
+ Preconditions.checkNotNull(config);
+ try {
+ this.htable = new HTable(config.getConfiguration(),
config.getTableName());
+ } catch (IOException e) {
+ LOG.error(StringUtils.stringifyException(e));
+ Throwables.propagate(e);
+ }
+ }
+
+ @Override
+ public void close() throws IOException {
+ if(resultIterator != null) {
+ try {
+ resultIterator.close();
+ } catch (SQLException e) {
+ LOG.error(" Error closing resultset.");
+ }
+ }
+ Closeables.close(this.htable, true);
+ }
+
+ @Override
+ public NullWritable getCurrentKey() throws IOException,
InterruptedException {
+ return key;
+ }
+
+ @Override
+ public PhoenixRecord getCurrentValue() throws IOException,
InterruptedException {
+ return value;
+ }
+
+ @Override
+ public float getProgress() throws IOException, InterruptedException {
+ return 0;
+ }
+
+ @Override
+ public void initialize(InputSplit split, TaskAttemptContext context)
throws IOException, InterruptedException {
+ final PhoenixInputSplit pSplit = (PhoenixInputSplit)split;
+ final Scan scan = pSplit.getScan();
+ this.projectedColumns = pSplit.getColumnProjectors();
+ try {
+ resultIterator = new
ScanningResultIterator(htable.getScanner(scan));
--- End diff --
I was looking into the various Result Iterators and noticed the query plan
returns me a TableResultIterator and it internally was delegating the iteration
of results to a ScanningResultIterator.
To use the ResultIterator from the QueryPlan , I would need to recreate the
instance within createRecordReader. I will do that in the next patch.
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