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
|
/*
* 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.
*/
<@pp.dropOutputFile />
<#list cast.types as type>
<#if type.major == ("IntDecimal") || type.major == ("BigIntDecimal")>
<@pp.changeOutputFile name="/org/apache/drill/exec/expr/fn/impl/gcast/Cast${type.from}${type.to}.java" />
<#include "/@includes/license.ftl" />
package org.apache.drill.exec.expr.fn.impl.gcast;
<#include "/@includes/vv_imports.ftl" />
import org.apache.drill.exec.expr.DrillSimpleFunc;
import org.apache.drill.exec.expr.annotations.FunctionTemplate;
import org.apache.drill.exec.expr.annotations.FunctionTemplate.NullHandling;
import org.apache.drill.exec.expr.annotations.Output;
import org.apache.drill.exec.expr.annotations.Param;
import org.apache.drill.exec.expr.holders.*;
import org.apache.drill.exec.record.RecordBatch;
import org.apache.drill.exec.util.DecimalUtility;
import org.apache.drill.exec.expr.annotations.Workspace;
import io.netty.buffer.ByteBuf;
import io.netty.buffer.DrillBuf;
import java.nio.ByteBuffer;
/*
* This class is generated using freemarker and the ${.template_name} template.
*/
@SuppressWarnings("unused")
@FunctionTemplate(name = "cast${type.to?upper_case}",
scope = FunctionTemplate.FunctionScope.SIMPLE,
returnType = FunctionTemplate.ReturnType.DECIMAL_CAST,
nulls = NullHandling.NULL_IF_NULL)
public class Cast${type.from}${type.to} implements DrillSimpleFunc {
@Param ${type.from}Holder in;
<#if type.to.startsWith("Decimal28") || type.to.startsWith("Decimal38") || type.to.endsWith("VarDecimal")>
@Inject DrillBuf buffer;
</#if>
@Param BigIntHolder precision;
@Param BigIntHolder scale;
@Output ${type.to}Holder out;
public void setup() {
<#if type.to.startsWith("Decimal28") || type.to.startsWith("Decimal38")>
int size = ${type.arraySize} * (org.apache.drill.exec.util.DecimalUtility.INTEGER_SIZE);
buffer = buffer.reallocIfNeeded(size);
</#if>
}
public void eval() {
out.scale = (int) scale.value;
<#if !type.to.endsWith("VarDecimal")>
out.precision = (int) precision.value;
</#if>
<#if type.to.endsWith("VarDecimal")>
out.start = 0;
out.buffer = buffer;
StringBuilder sb = new StringBuilder();
sb.append(Long.toString((long)in.value));
for (int i = 0; i < out.scale; ++i) { // add 0's to get unscaled integer
sb.append("0");
}
java.math.BigInteger bi = new java.math.BigInteger(sb.toString());
java.math.BigDecimal bd = new java.math.BigDecimal(bi, out.scale);
int len = org.apache.drill.exec.util.DecimalUtility.getVarDecimalFromBigDecimal(bd, out.buffer, out.start);
out.end = out.start + len;
<#elseif type.to == "Decimal9" || type.to == "Decimal18">
out.value = (${type.javatype}) in.value;
// converting from integer to decimal, pad zeroes if scale is non zero
out.value = (${type.javatype}) org.apache.drill.exec.util.DecimalUtility.adjustScaleMultiply(out.value, (int) scale.value);
<#else>
out.start = 0;
out.buffer = buffer;
// Initialize the buffer
for (int i = 0; i < ${type.arraySize}; i++) {
out.setInteger(i, 0, out.start, out.buffer);
}
// check if input is a negative number and store the sign
if (in.value < 0) {
out.setSign(true, out.start, out.buffer);
}
// Figure out how many array positions to be left for the scale part
int scaleSize = org.apache.drill.exec.util.DecimalUtility.roundUp((int) scale.value);
int integerIndex = (${type.arraySize} - scaleSize - 1);
long inValue = in.value;
while (inValue != 0 && integerIndex >= 0) {
out.setInteger(integerIndex--, (int) Math.abs((inValue % org.apache.drill.exec.util.DecimalUtility.DIGITS_BASE)), out.start, out.buffer);
inValue = inValue / org.apache.drill.exec.util.DecimalUtility.DIGITS_BASE;
}
</#if>
}
}
</#if> <#-- type.major -->
</#list>
|
