-
Notifications
You must be signed in to change notification settings - Fork 497
/
HiveUdfExecutorGeneric.java
144 lines (130 loc) · 5.68 KB
/
HiveUdfExecutorGeneric.java
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
// 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.impala.hive.executor;
import sun.misc.Unsafe;
import java.io.File;
import java.io.IOException;
import java.lang.reflect.Constructor;
import java.lang.reflect.InvocationTargetException;
import java.lang.reflect.Method;
import java.net.MalformedURLException;
import java.net.URL;
import java.net.URLClassLoader;
import java.util.ArrayList;
import java.util.List;
import org.apache.hadoop.hive.ql.exec.UDFArgumentException;
import org.apache.hadoop.hive.ql.metadata.HiveException;
import org.apache.hadoop.hive.ql.udf.generic.GenericUDF;
import org.apache.hadoop.hive.ql.udf.generic.GenericUDF.DeferredJavaObject;
import org.apache.hadoop.hive.ql.udf.generic.GenericUDF.DeferredObject;
import org.apache.hadoop.hive.serde2.objectinspector.ObjectInspector;
import org.apache.hadoop.hive.serde2.objectinspector.primitive.PrimitiveObjectInspectorFactory;
import org.apache.hadoop.io.BooleanWritable;
import org.apache.hadoop.io.BytesWritable;
import org.apache.hadoop.io.FloatWritable;
import org.apache.hadoop.io.IntWritable;
import org.apache.hadoop.io.LongWritable;
import org.apache.hadoop.io.Text;
import org.apache.hadoop.io.Writable;
import org.apache.impala.catalog.Type;
import org.apache.impala.common.ImpalaException;
import org.apache.impala.common.ImpalaRuntimeException;
import org.apache.impala.common.JniUtil;
import org.apache.impala.thrift.THiveUdfExecutorCtorParams;
import org.apache.impala.thrift.TPrimitiveType;
import org.apache.impala.util.UnsafeUtil;
import org.apache.log4j.Logger;
import org.apache.thrift.protocol.TBinaryProtocol;
import com.google.common.base.Joiner;
import com.google.common.base.Preconditions;
import com.google.common.collect.Lists;
/**
* Wrapper object to run hive GenericUDFs. This class works with UdfCallExpr in the
* backend to marshall data back and forth between the execution engine and
* the java UDF class.
* See the comments in be/src/exprs/hive-udf-call.h for more details.
*/
public class HiveUdfExecutorGeneric extends HiveUdfExecutor {
private static final Logger LOG = Logger.getLogger(HiveUdfExecutorGeneric.class);
private GenericUDF genericUDF_;
// Hive Generic UDFs expect a DeferredObject for each parameter passed in. However,
// if the ith parameter is NULL, then Hive expects the deferredObject[i] value to
// contain null. The deferredParameters array is populated at initialization time. The
// runtimeDeferredObjects is passed into the Hive Generic UDF code at runtime and
// the runDeferredParameters[i] value will either contain deferredParameters[i] or NULL.
private DeferredObject[] deferredParameters_;
private DeferredObject[] runtimeDeferredParameters_;
/**
* Create a UdfExecutor, using parameters from a serialized thrift object. Used by
* the backend.
*/
public HiveUdfExecutorGeneric(THiveUdfExecutorCtorParams request,
HiveGenericJavaFunction hiveJavaFn) throws ImpalaRuntimeException {
super(request, JavaUdfDataType.getType(hiveJavaFn.getReturnObjectInspector()),
JavaUdfDataType.getTypes(hiveJavaFn.getParameterTypes()));
genericUDF_ = hiveJavaFn.getGenericUDFInstance();
deferredParameters_ = createDeferredObjects();
runtimeDeferredParameters_ = new DeferredObject[getNumParams()];
}
@Override
public void closeDerived() {
}
/**
* Evalutes the UDF with 'args' as the input to the UDF.
*/
@Override
protected Object evaluateDerived(JavaUdfDataType[] argTypes,
long inputNullsPtr, Object[] inputObjectArgs) throws ImpalaRuntimeException {
try {
for (int i = 0; i < runtimeDeferredParameters_.length; ++i) {
runtimeDeferredParameters_[i] =
(UnsafeUtil.UNSAFE.getByte(inputNullsPtr + i) == 0)
? deferredParameters_[i]
: null;
}
return genericUDF_.evaluate(runtimeDeferredParameters_);
} catch (HiveException e) {
throw new ImpalaRuntimeException("UDF failed to evaluate", e);
} catch (IllegalArgumentException e) {
throw new ImpalaRuntimeException("UDF failed to evaluate", e);
}
}
/**
* Special method for unit testing. In the Java unit tests, the arguments
* will change on every iteration, forcing us to create new a DeferredJavaObject
* each time. In the python E2E tests, the normal pathway will be tested.
*/
@Override
public long evaluateForTesting(Object... args) throws ImpalaRuntimeException {
Preconditions.checkState(args.length == deferredParameters_.length);
for (int i = 0; i < deferredParameters_.length; ++i) {
deferredParameters_[i] = new DeferredJavaObject(args[i]);
}
return evaluate();
}
@Override
public Method getMethod() {
return null;
}
private DeferredObject[] createDeferredObjects() {
DeferredObject[] deferredObjects = new DeferredObject[getNumParams()];
for (int i = 0; i < deferredObjects.length; ++i) {
deferredObjects[i] = new DeferredJavaObject(getInputObject(i));
}
return deferredObjects;
}
}