/
app_version.go
184 lines (164 loc) · 6.27 KB
/
app_version.go
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
181
182
183
184
// 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 metadata
import (
"regexp"
"strconv"
"strings"
"github.com/apache/arrow/go/v9/parquet"
"github.com/apache/arrow/go/v9/parquet/schema"
)
var (
// Regular expression for the version format
// major . minor . patch unknown - prerelease.x + build info
// Eg: 1.5.0ab-cdh5.5.0+cd
versionRx = regexp.MustCompile(`^(\d+)\.(\d+)\.(\d+)([^-+]*)?(?:-([^+]*))?(?:\+(.*))?$`)
// Regular expression for the application format
// application_name version VERSION_FORMAT (build build_name)
// Eg: parquet-cpp version 1.5.0ab-xyz5.5.0+cd (build abcd)
applicationRx = regexp.MustCompile(`^(.*?)\s*(?:(version\s*(?:([^(]*?)\s*(?:\(\s*build\s*([^)]*?)\s*\))?)?)?)$`)
// Parquet816FixedVersion is the version used for fixing PARQUET-816
// that changed the padding calculations for dictionary headers on row groups.
Parquet816FixedVersion = NewAppVersionExplicit("parquet-mr", 1, 2, 9)
parquet251FixedVersion = NewAppVersionExplicit("parquet-mr", 1, 8, 0)
parquetCPPFixedStatsVersion = NewAppVersionExplicit("parquet-cpp", 1, 3, 0)
parquetMRFixedStatsVersion = NewAppVersionExplicit("parquet-mr", 1, 10, 0)
// parquet1655FixedVersion is the version used for fixing PARQUET-1655
// which fixed min/max stats comparisons for Decimal types
parquet1655FixedVersion = NewAppVersionExplicit("parquet-cpp-arrow", 4, 0, 0)
)
// AppVersion represents a specific application version either read from
// or written to a parquet file.
type AppVersion struct {
App string
Build string
Version struct {
Major int
Minor int
Patch int
Unknown string
PreRelease string
BuildInfo string
}
}
// NewAppVersionExplicit is a convenience function to construct a specific
// application version from the given app string and version
func NewAppVersionExplicit(app string, major, minor, patch int) *AppVersion {
v := &AppVersion{App: app}
v.Version.Major = major
v.Version.Minor = minor
v.Version.Patch = patch
return v
}
// NewAppVersion parses a "created by" string such as "parquet-go 1.0.0".
//
// It also supports handling pre-releases and build info such as
// parquet-cpp version 1.5.0ab-xyz5.5.0+cd (build abcd)
func NewAppVersion(createdby string) *AppVersion {
v := &AppVersion{}
var ver []string
m := applicationRx.FindStringSubmatch(strings.ToLower(createdby))
if len(m) >= 4 {
v.App = m[1]
v.Build = m[4]
ver = versionRx.FindStringSubmatch(m[3])
} else {
v.App = "unknown"
}
if len(ver) >= 7 {
v.Version.Major, _ = strconv.Atoi(ver[1])
v.Version.Minor, _ = strconv.Atoi(ver[2])
v.Version.Patch, _ = strconv.Atoi(ver[3])
v.Version.Unknown = ver[4]
v.Version.PreRelease = ver[5]
v.Version.BuildInfo = ver[6]
}
return v
}
// LessThan compares the app versions and returns true if this version
// is "less than" the passed version.
//
// If the apps don't match, this always returns false. Otherwise it compares
// the major versions first, then the minor versions, and finally the patch
// versions.
//
// Pre-release and build info are not considered.
func (v AppVersion) LessThan(other *AppVersion) bool {
switch {
case v.App != other.App:
return false
case v.Version.Major < other.Version.Major:
return true
case v.Version.Major > other.Version.Major:
return false
case v.Version.Minor < other.Version.Minor:
return true
case v.Version.Minor > other.Version.Minor:
return false
}
return v.Version.Patch < other.Version.Patch
}
// Equal only compares the Application and major/minor/patch versions.
//
// Pre-release and build info are not considered.
func (v AppVersion) Equal(other *AppVersion) bool {
return v.App == other.App &&
v.Version.Major == other.Version.Major &&
v.Version.Minor == other.Version.Minor &&
v.Version.Patch == other.Version.Patch
}
// HasCorrectStatistics checks whether or not the statistics are valid to be used
// based on the primitive type and the version since previous versions had issues with
// properly computing stats.
//
// Reference: parquet-cpp/src/parquet/metadata.cc
//
// PARQUET-686 has more discussion on statistics
func (v AppVersion) HasCorrectStatistics(coltype parquet.Type, logicalType schema.LogicalType, stats EncodedStatistics, sort schema.SortOrder) bool {
// parquet-cpp version 1.3.0 and parquet-mr 1.10.0 onwards stats are computed correctly for all types except decimal
if (v.App == "parquet-cpp" && v.LessThan(parquetCPPFixedStatsVersion)) ||
(v.App == "parquet-mr" && v.LessThan(parquetMRFixedStatsVersion)) {
// only SIGNED are valid unless max and min are the same (in which case the sort order doesn't matter)
var maxEqualsMin bool
if stats.HasMin && stats.HasMax {
maxEqualsMin = string(stats.Min) == string(stats.Max)
}
if sort != schema.SortSIGNED && !maxEqualsMin {
return false
}
if coltype != parquet.Types.FixedLenByteArray && coltype != parquet.Types.ByteArray {
return true
}
}
// parquet-cpp-arrow version 4.0.0 fixed Decimal comparisons for creating min/max stats
// parquet-cpp also becomes parquet-cpp-arrow as of version 4.0.0
if v.App == "parquet-cpp" || (v.App == "parquet-cpp-arrow" && v.LessThan(parquet1655FixedVersion)) {
if _, ok := logicalType.(*schema.DecimalLogicalType); ok && coltype == parquet.Types.FixedLenByteArray {
return false
}
}
// created_by is not populated, which could have been caused by
// parquet-mr during the same time as PARQUET-251, see PARQUET-297
if v.App == "unknown" {
return true
}
// unknown sort order has incorrect stats
if sort == schema.SortUNKNOWN {
return false
}
// PARQUET-251
return !v.LessThan(parquet251FixedVersion)
}