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
|
<?php
namespace SMW\SQLStore\EntityStore;
use SMW\SQLStore\SQLStore;
use SMW\SQLStore\PropertyTableDefinition as TableDefinition;
use SMWDataItem as DataItem;
use SMW\DIWikiPage;
use SMW\RequestOptions;
use RuntimeException;
/**
* @license GNU GPL v2
* @since 3.0
*
* @author mwjames
*/
class PropertiesLookup {
/**
* @var SQLStore
*/
private $store;
/**
* @since 3.0
*
* @param SQLStore $store
*/
public function __construct( SQLStore $store ) {
$this->store = $store;
}
/**
* @since 3.0
*
* @return RequestOptions|null
*/
public function newRequestOptions( RequestOptions $requestOptions = null ) {
if ( $requestOptions !== null ) {
$clone = clone $requestOptions;
$clone->limit = $requestOptions->limit + $requestOptions->offset;
$clone->offset = 0;
} else {
$clone = null;
}
return $clone;
}
/**
* @see Store::getProperties
*
* @since 3.0
*
* {@inheritDoc}
*/
public function fetchFromTable( DIWikiPage $subject, TableDefinition $propertyTable, RequestOptions $requestOptions = null ) {
$connection = $this->store->getConnection( 'mw.db' );
$query = $connection->newQuery();
$query->type( 'SELECT' );
$query->table( $propertyTable->getName() );
if ( $propertyTable->usesIdSubject() ) {
$query->condition( $query->eq( 's_id', $subject->getId() ) );
} elseif ( $subject->getInterwiki() === '' ) {
$query->condition( $query->eq( 's_title', $subject->getDBkey() ) );
$query->condition( $query->eq( 's_namespace', $subject->getNamespace() ) );
} else {
// subjects with non-empty interwiki cannot have properties
return [];
}
if ( $propertyTable->isFixedPropertyTable() ) {
return $this->fetchFromFixedTable( $query, $propertyTable->getFixedProperty() );
}
$query->join(
'INNER JOIN',
[ SQLStore::ID_TABLE => "ON smw_id=p_id" ]
);
$query->fields( [ 'smw_title', 'smw_sortkey' ] );
// (select sortkey since it might be used in ordering (needed by Postgres))
$query->condition( $this->store->getSQLConditions(
$requestOptions,
'smw_sortkey',
'smw_sortkey'
) );
$opt = $this->store->getSQLOptions(
$requestOptions,
'smw_sortkey'
);
$query->options( $opt + [ 'DISTINCT' => true ] );
return $query->execute( __METHOD__ );
}
private function fetchFromFixedTable( $query, $title ) {
// just check if subject occurs in table
$query->options(
[ 'LIMIT' => 1 ]
);
$query->field( '*' );
$res = $query->execute( __METHOD__ );
if ( $res->numRows() > 0 ) {
return [ $title ];
}
return [];
}
}
|
