1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
|
/*
* 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.drill.exec.store.easy.sequencefile;
import org.apache.drill.common.exceptions.ExecutionSetupException;
import org.apache.drill.common.expression.SchemaPath;
import org.apache.drill.common.logical.StoragePluginConfig;
import org.apache.drill.exec.ops.FragmentContext;
import org.apache.drill.exec.physical.base.AbstractGroupScan;
import org.apache.drill.exec.proto.UserBitShared.CoreOperatorType;
import org.apache.drill.exec.planner.common.DrillStatsTable.TableStatistics;
import org.apache.drill.exec.server.DrillbitContext;
import org.apache.drill.exec.store.RecordReader;
import org.apache.drill.exec.store.RecordWriter;
import org.apache.drill.exec.store.dfs.DrillFileSystem;
import org.apache.drill.exec.store.dfs.FileSelection;
import org.apache.drill.exec.store.dfs.easy.EasyFormatPlugin;
import org.apache.drill.exec.store.dfs.easy.EasyGroupScan;
import org.apache.drill.exec.store.dfs.easy.EasyWriter;
import org.apache.drill.exec.store.dfs.easy.FileWork;
import org.apache.hadoop.conf.Configuration;
import org.apache.hadoop.fs.FileSystem;
import org.apache.hadoop.fs.Path;
import org.apache.hadoop.mapred.FileSplit;
import java.io.IOException;
import java.util.List;
public class SequenceFileFormatPlugin extends EasyFormatPlugin<SequenceFileFormatConfig> {
public SequenceFileFormatPlugin(String name, DrillbitContext context, Configuration fsConf,
StoragePluginConfig storageConfig) {
this(name, context, fsConf, storageConfig, new SequenceFileFormatConfig());
}
public SequenceFileFormatPlugin(String name, DrillbitContext context, Configuration fsConf,
StoragePluginConfig storageConfig, SequenceFileFormatConfig formatConfig) {
super(name, context, fsConf, storageConfig, formatConfig,
true, false, /* splittable = */ true, /* compressible = */ true,
formatConfig.getExtensions(), "sequencefile");
}
@Override
public boolean supportsPushDown() {
return true;
}
@Override
public AbstractGroupScan getGroupScan(String userName, FileSelection selection, List<SchemaPath> columns)
throws IOException {
return new EasyGroupScan(userName, selection, this, columns, selection.selectionRoot);
}
@Override
public boolean supportsStatistics() {
return false;
}
@Override
public TableStatistics readStatistics(FileSystem fs, Path statsTablePath) throws IOException {
throw new UnsupportedOperationException("unimplemented");
}
@Override
public void writeStatistics(TableStatistics statistics, FileSystem fs, Path statsTablePath) throws IOException {
throw new UnsupportedOperationException("unimplemented");
}
@Override
public RecordReader getRecordReader(FragmentContext context,
DrillFileSystem dfs,
FileWork fileWork,
List<SchemaPath> columns,
String userName) throws ExecutionSetupException {
final Path path = dfs.makeQualified(new Path(fileWork.getPath()));
final FileSplit split = new FileSplit(path, fileWork.getStart(), fileWork.getLength(), new String[]{""});
return new SequenceFileRecordReader(split, dfs, context.getQueryUserName(), userName);
}
@Override
public int getReaderOperatorType() {
return CoreOperatorType.SEQUENCE_SUB_SCAN_VALUE;
}
@Override
public RecordWriter getRecordWriter(FragmentContext context, EasyWriter writer) throws IOException {
throw new UnsupportedOperationException();
}
@Override
public int getWriterOperatorType() {
throw new UnsupportedOperationException();
}
}
|
