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
185
|
<?php
/**
* Fills the rev_sha1 and ar_sha1 columns of revision
* and archive tables for revisions created before MW 1.19.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2 of the License, or
* (at your option) any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License along
* with this program; if not, write to the Free Software Foundation, Inc.,
* 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA.
* http://www.gnu.org/copyleft/gpl.html
*
* @ingroup Maintenance
*/
require_once( dirname( __FILE__ ) . '/Maintenance.php' );
class PopulateRevisionSha1 extends LoggedUpdateMaintenance {
public function __construct() {
parent::__construct();
$this->mDescription = "Populates the rev_sha1 and ar_sha1 fields";
$this->setBatchSize( 200 );
}
protected function getUpdateKey() {
return 'populate rev_sha1';
}
protected function doDBUpdates() {
$db = $this->getDB( DB_MASTER );
if ( !$db->tableExists( 'revision' ) ) {
$this->error( "revision table does not exist", true );
} elseif ( !$db->tableExists( 'archive' ) ) {
$this->error( "archive table does not exist", true );
}
$this->output( "Populating rev_sha1 column\n" );
$rc = $this->doSha1Updates( 'revision', 'rev_id', 'rev' );
$this->output( "Populating ar_sha1 column\n" );
$ac = $this->doSha1Updates( 'archive', 'ar_rev_id', 'ar' );
$this->output( "Populating ar_sha1 column legacy rows\n" );
$ac += $this->doSha1LegacyUpdates();
$this->output( "rev_sha1 and ar_sha1 population complete [$rc revision rows, $ac archive rows].\n" );
return true;
}
/**
* @param $table string
* @param $idCol
* @param $prefix string
* @return Integer Rows changed
*/
protected function doSha1Updates( $table, $idCol, $prefix ) {
$db = $this->getDB( DB_MASTER );
$start = $db->selectField( $table, "MIN($idCol)", false, __METHOD__ );
$end = $db->selectField( $table, "MAX($idCol)", false, __METHOD__ );
if ( !$start || !$end ) {
$this->output( "...$table table seems to be empty.\n" );
return 0;
}
$count = 0;
# Do remaining chunk
$end += $this->mBatchSize - 1;
$blockStart = $start;
$blockEnd = $start + $this->mBatchSize - 1;
while ( $blockEnd <= $end ) {
$this->output( "...doing $idCol from $blockStart to $blockEnd\n" );
$cond = "$idCol BETWEEN $blockStart AND $blockEnd
AND $idCol IS NOT NULL AND {$prefix}_sha1 = ''";
$res = $db->select( $table, '*', $cond, __METHOD__ );
$db->begin();
foreach ( $res as $row ) {
if ( $this->upgradeRow( $row, $table, $idCol, $prefix ) ) {
$count++;
}
}
$db->commit();
$blockStart += $this->mBatchSize;
$blockEnd += $this->mBatchSize;
wfWaitForSlaves();
}
return $count;
}
/**
* @return int
*/
protected function doSha1LegacyUpdates() {
$count = 0;
$db = $this->getDB( DB_MASTER );
$res = $db->select( 'archive', '*', array( 'ar_rev_id IS NULL' ), __METHOD__ );
$updateSize = 0;
$db->begin();
foreach ( $res as $row ) {
if ( $this->upgradeLegacyArchiveRow( $row ) ) {
++$count;
}
if ( ++$updateSize >= 100 ) {
$updateSize = 0;
$db->commit();
$this->output( "Commited row with ar_timestamp={$row->ar_timestamp}\n" );
wfWaitForSlaves();
$db->begin();
}
}
$db->commit();
return $count;
}
/**
* @param $row
* @param $table
* @param $idCol
* @param $prefix
* @return bool
*/
protected function upgradeRow( $row, $table, $idCol, $prefix ) {
$db = $this->getDB( DB_MASTER );
if ( $table === 'archive' ) {
$rev = Revision::newFromArchiveRow( $row );
} else {
$rev = new Revision( $row );
}
$text = $rev->getRawText();
if ( !is_string( $text ) ) {
# This should not happen, but sometimes does (bug 20757)
$this->output( "Text of revision with {$idCol}={$row->$idCol} unavailable!\n" );
return false;
} else {
$db->update( $table,
array( "{$prefix}_sha1" => Revision::base36Sha1( $text ) ),
array( $idCol => $row->$idCol ),
__METHOD__
);
return true;
}
}
/**
* @param $row
* @return bool
*/
protected function upgradeLegacyArchiveRow( $row ) {
$db = $this->getDB( DB_MASTER );
$rev = Revision::newFromArchiveRow( $row );
$text = $rev->getRawText();
if ( !is_string( $text ) ) {
# This should not happen, but sometimes does (bug 20757)
$this->output( "Text of revision with timestamp {$row->ar_timestamp} unavailable!\n" );
return false;
} else {
# Archive table as no PK, but (NS,title,time) should be near unique.
# Any duplicates on those should also have duplicated text anyway.
$db->update( 'archive',
array( 'ar_sha1' => Revision::base36Sha1( $text ) ),
array(
'ar_namespace' => $row->ar_namespace,
'ar_title' => $row->ar_title,
'ar_timestamp' => $row->ar_timestamp,
'ar_len' => $row->ar_len // extra sanity
),
__METHOD__
);
return true;
}
}
}
$maintClass = "PopulateRevisionSha1";
require_once( RUN_MAINTENANCE_IF_MAIN );
|
