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
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
|
/**
* 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.physical.impl;
import java.io.IOException;
import org.apache.drill.common.expression.SchemaPath;
import org.apache.drill.common.types.TypeProtos.MinorType;
import org.apache.drill.common.types.Types;
import org.apache.drill.exec.expr.TypeHelper;
import org.apache.drill.exec.memory.OutOfMemoryException;
import org.apache.drill.exec.ops.FragmentContext;
import org.apache.drill.exec.physical.base.Writer;
import org.apache.drill.exec.proto.ExecProtos.FragmentHandle;
import org.apache.drill.exec.record.AbstractRecordBatch;
import org.apache.drill.exec.record.BatchSchema;
import org.apache.drill.exec.record.MaterializedField;
import org.apache.drill.exec.record.RecordBatch;
import org.apache.drill.exec.record.RecordValueAccessor;
import org.apache.drill.exec.record.VectorWrapper;
import org.apache.drill.exec.store.EventBasedRecordWriter;
import org.apache.drill.exec.store.RecordWriter;
import org.apache.drill.exec.vector.AllocationHelper;
import org.apache.drill.exec.vector.BigIntVector;
import org.apache.drill.exec.vector.VarCharVector;
/* Write the RecordBatch to the given RecordWriter. */
public class WriterRecordBatch extends AbstractRecordBatch<Writer> {
static final org.slf4j.Logger logger = org.slf4j.LoggerFactory.getLogger(WriterRecordBatch.class);
private EventBasedRecordWriter eventBasedRecordWriter;
private RecordWriter recordWriter;
private int counter = 0;
private final RecordBatch incoming;
private boolean first = true;
private boolean processed = false;
private String fragmentUniqueId;
public WriterRecordBatch(Writer writer, RecordBatch incoming, FragmentContext context, RecordWriter recordWriter) throws OutOfMemoryException {
super(writer, context);
this.incoming = incoming;
FragmentHandle handle = context.getHandle();
fragmentUniqueId = String.format("%d_%d", handle.getMajorFragmentId(), handle.getMinorFragmentId());
this.recordWriter = recordWriter;
}
@Override
public int getRecordCount() {
return container.getRecordCount();
}
@Override
protected void killIncoming(boolean sendUpstream) {
incoming.kill(sendUpstream);
}
@Override
public IterOutcome innerNext() {
if(processed) {
// if the upstream record batch is already processed and next() is called by
// downstream then return NONE to indicate completion
return IterOutcome.NONE;
}
// process the complete upstream in one next() call
IterOutcome upstream;
do {
upstream = next(incoming);
if(first && upstream == IterOutcome.OK)
upstream = IterOutcome.OK_NEW_SCHEMA;
first = false;
switch(upstream) {
case NOT_YET:
case NONE:
case STOP:
cleanup();
if (upstream == IterOutcome.STOP)
return upstream;
break;
case OK_NEW_SCHEMA:
try{
setupNewSchema();
}catch(Exception ex){
kill(false);
logger.error("Failure during query", ex);
context.fail(ex);
return IterOutcome.STOP;
}
// fall through.
case OK:
try {
counter += eventBasedRecordWriter.write(incoming.getRecordCount());
logger.debug("Total records written so far: {}", counter);
} catch(IOException ex) {
throw new RuntimeException(ex);
}
for(VectorWrapper v : incoming)
v.getValueVector().clear();
break;
default:
throw new UnsupportedOperationException();
}
} while(upstream != IterOutcome.NONE);
// Create two vectors for:
// 1. Fragment unique id.
// 2. Summary: currently contains number of records written.
MaterializedField fragmentIdField = MaterializedField.create(SchemaPath.getSimplePath("Fragment"), Types.required(MinorType.VARCHAR));
MaterializedField summaryField = MaterializedField.create(SchemaPath.getSimplePath("Number of records written"), Types.required(MinorType.BIGINT));
VarCharVector fragmentIdVector = (VarCharVector) TypeHelper.getNewVector(fragmentIdField, context.getAllocator());
AllocationHelper.allocate(fragmentIdVector, 1, TypeHelper.getSize(Types.required(MinorType.VARCHAR)));
BigIntVector summaryVector = (BigIntVector) TypeHelper.getNewVector(summaryField, context.getAllocator());
AllocationHelper.allocate(summaryVector, 1, TypeHelper.getSize(Types.required(MinorType.VARCHAR)));
container.add(fragmentIdVector);
container.add(summaryVector);
container.buildSchema(BatchSchema.SelectionVectorMode.NONE);
fragmentIdVector.getMutator().setSafe(0, fragmentUniqueId.getBytes());
fragmentIdVector.getMutator().setValueCount(1);
summaryVector.getMutator().setSafe(0, counter);
summaryVector.getMutator().setValueCount(1);
container.setRecordCount(1);
processed = true;
return IterOutcome.OK_NEW_SCHEMA;
}
protected void setupNewSchema() throws Exception {
try {
// update the schema in RecordWriter
stats.startSetup();
recordWriter.updateSchema(incoming.getSchema());
} catch(IOException ex) {
throw new RuntimeException("Failed to update schema in RecordWriter", ex);
} finally{
stats.stopSetup();
}
eventBasedRecordWriter = new EventBasedRecordWriter(incoming, recordWriter);
}
@Override
public void cleanup() {
super.cleanup();
incoming.cleanup();
try {
if (recordWriter != null) {
recordWriter.cleanup();
}
} catch(IOException ex) {
throw new RuntimeException("Failed to close RecordWriter", ex);
}
}
}
|
