MediaWiki  REL1_31
SearchMssql.php
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1 <?php
28 class SearchMssql extends SearchDatabase {
36  function searchText( $term ) {
37  $resultSet = $this->db->query( $this->getQuery( $this->filter( $term ), true ) );
38  return new SqlSearchResultSet( $resultSet, $this->searchTerms );
39  }
40 
48  function searchTitle( $term ) {
49  $resultSet = $this->db->query( $this->getQuery( $this->filter( $term ), false ) );
50  return new SqlSearchResultSet( $resultSet, $this->searchTerms );
51  }
52 
59  function queryNamespaces() {
60  $namespaces = implode( ',', $this->namespaces );
61  if ( $namespaces == '' ) {
62  $namespaces = '0';
63  }
64  return 'AND page_namespace IN (' . $namespaces . ')';
65  }
66 
74  function queryLimit( $sql ) {
75  return $this->db->limitResult( $sql, $this->limit, $this->offset );
76  }
77 
86  function queryRanking( $filteredTerm, $fulltext ) {
87  return ' ORDER BY ftindex.[RANK] DESC'; // return ' ORDER BY score(1)';
88  }
89 
98  function getQuery( $filteredTerm, $fulltext ) {
99  return $this->queryLimit( $this->queryMain( $filteredTerm, $fulltext ) . ' ' .
100  $this->queryNamespaces() . ' ' .
101  $this->queryRanking( $filteredTerm, $fulltext ) . ' ' );
102  }
103 
110  function getIndexField( $fulltext ) {
111  return $fulltext ? 'si_text' : 'si_title';
112  }
113 
122  function queryMain( $filteredTerm, $fulltext ) {
123  $match = $this->parseQuery( $filteredTerm, $fulltext );
124  $page = $this->db->tableName( 'page' );
125  $searchindex = $this->db->tableName( 'searchindex' );
126 
127  return 'SELECT page_id, page_namespace, page_title, ftindex.[RANK]' .
128  "FROM $page,FREETEXTTABLE($searchindex , $match, LANGUAGE 'English') as ftindex " .
129  'WHERE page_id=ftindex.[KEY] ';
130  }
131 
137  function parseQuery( $filteredText, $fulltext ) {
139  $lc = $this->legalSearchChars( self::CHARS_NO_SYNTAX );
140  $this->searchTerms = [];
141 
142  # @todo FIXME: This doesn't handle parenthetical expressions.
143  $m = [];
144  $q = [];
145 
146  if ( preg_match_all( '/([-+<>~]?)(([' . $lc . ']+)(\*?)|"[^"]*")/',
147  $filteredText, $m, PREG_SET_ORDER ) ) {
148  foreach ( $m as $terms ) {
149  $q[] = $terms[1] . $wgContLang->normalizeForSearch( $terms[2] );
150 
151  if ( !empty( $terms[3] ) ) {
152  $regexp = preg_quote( $terms[3], '/' );
153  if ( $terms[4] ) {
154  $regexp .= "[0-9A-Za-z_]+";
155  }
156  } else {
157  $regexp = preg_quote( str_replace( '"', '', $terms[2] ), '/' );
158  }
159  $this->searchTerms[] = $regexp;
160  }
161  }
162 
163  $searchon = $this->db->addQuotes( implode( ',', $q ) );
164  $field = $this->getIndexField( $fulltext );
165  return "$field, $searchon";
166  }
167 
177  function update( $id, $title, $text ) {
178  // We store the column data as UTF-8 byte order marked binary stream
179  // because we are invoking the plain text IFilter on it so that, and we want it
180  // to properly decode the stream as UTF-8. SQL doesn't support UTF8 as a data type
181  // but the indexer will correctly handle it by this method. Since all we are doing
182  // is passing this data to the indexer and never retrieving it via PHP, this will save space
183  $table = $this->db->tableName( 'searchindex' );
184  $utf8bom = '0xEFBBBF';
185  $si_title = $utf8bom . bin2hex( $title );
186  $si_text = $utf8bom . bin2hex( $text );
187  $sql = "DELETE FROM $table WHERE si_page = $id;";
188  $sql .= "INSERT INTO $table (si_page, si_title, si_text) VALUES ($id, $si_title, $si_text)";
189  return $this->db->query( $sql, 'SearchMssql::update' );
190  }
191 
200  function updateTitle( $id, $title ) {
201  $table = $this->db->tableName( 'searchindex' );
202 
203  // see update for why we are using the utf8bom
204  $utf8bom = '0xEFBBBF';
205  $si_title = $utf8bom . bin2hex( $title );
206  $sql = "DELETE FROM $table WHERE si_page = $id;";
207  $sql .= "INSERT INTO $table (si_page, si_title, si_text) VALUES ($id, $si_title, 0x00)";
208  return $this->db->query( $sql, 'SearchMssql::updateTitle' );
209  }
210 }
SearchEngine\legalSearchChars
static legalSearchChars( $type=self::CHARS_ALL)
Get chars legal for search NOTE: usage as static is deprecated and preserved only as BC measure.
Definition: SearchEngine.php:221
SearchMssql
Search engine hook base class for Mssql (ConText).
Definition: SearchMssql.php:28
SearchMssql\queryLimit
queryLimit( $sql)
Return a LIMIT clause to limit results on the query.
Definition: SearchMssql.php:74
SearchMssql\queryMain
queryMain( $filteredTerm, $fulltext)
Get the base part of the search query.
Definition: SearchMssql.php:122
SearchEngine\$namespaces
int[] null $namespaces
Definition: SearchEngine.php:39
SearchMssql\searchTitle
searchTitle( $term)
Perform a title-only search query and return a result set.
Definition: SearchMssql.php:48
php
injection txt This is an overview of how MediaWiki makes use of dependency injection The design described here grew from the discussion of RFC T384 The term dependency this means that anything an object needs to operate should be injected from the the object itself should only know narrow no concrete implementation of the logic it relies on The requirement to inject everything typically results in an architecture that based on two main types of and essentially stateless service objects that use other service objects to operate on the value objects As of the beginning MediaWiki is only starting to use the DI approach Much of the code still relies on global state or direct resulting in a highly cyclical dependency which acts as the top level factory for services in MediaWiki which can be used to gain access to default instances of various services MediaWikiServices however also allows new services to be defined and default services to be redefined Services are defined or redefined by providing a callback the instantiator that will return a new instance of the service When it will create an instance of MediaWikiServices and populate it with the services defined in the files listed by thereby bootstrapping the DI framework Per $wgServiceWiringFiles lists includes ServiceWiring php
Definition: injection.txt:37
SearchDatabase
Base search engine base class for database-backed searches.
Definition: SearchDatabase.php:31
$term
For QUnit the mediawiki tests qunit testrunner dependency will be added to any module whereas SearchGetNearMatch runs after $term
Definition: hooks.txt:2845
namespaces
to move a page</td >< td > &*You are moving the page across namespaces
Definition: All_system_messages.txt:2670
SearchMssql\searchText
searchText( $term)
Perform a full text search query and return a result set.
Definition: SearchMssql.php:36
SearchMssql\getQuery
getQuery( $filteredTerm, $fulltext)
Construct the full SQL query to do the search.
Definition: SearchMssql.php:98
SearchMssql\updateTitle
updateTitle( $id, $title)
Update a search index record's title only.
Definition: SearchMssql.php:200
$title
namespace and then decline to actually register it file or subcat img or subcat $title
Definition: hooks.txt:964
global
when a variable name is used in a it is silently declared as a new masking the global
Definition: design.txt:95
SearchMssql\parseQuery
parseQuery( $filteredText, $fulltext)
Definition: SearchMssql.php:137
SqlSearchResultSet
This class is used for different SQL-based search engines shipped with MediaWiki.
Definition: SqlSearchResultSet.php:9
SearchMssql\queryRanking
queryRanking( $filteredTerm, $fulltext)
Does not do anything for generic search engine subclasses may define this though.
Definition: SearchMssql.php:86
SearchMssql\update
update( $id, $title, $text)
Create or update the search index record for the given page.
Definition: SearchMssql.php:177
as
This document is intended to provide useful advice for parties seeking to redistribute MediaWiki to end users It s targeted particularly at maintainers for Linux since it s been observed that distribution packages of MediaWiki often break We ve consistently had to recommend that users seeking support use official tarballs instead of their distribution s and this often solves whatever problem the user is having It would be nice if this could such as
Definition: distributors.txt:22
SearchMssql\getIndexField
getIndexField( $fulltext)
Picks which field to index on, depending on what type of query.
Definition: SearchMssql.php:110
SearchDatabase\filter
filter( $text)
Return a 'cleaned up' search string.
Definition: SearchDatabase.php:54
SearchMssql\queryNamespaces
queryNamespaces()
Return a partial WHERE clause to limit the search to the given namespaces.
Definition: SearchMssql.php:59
$wgContLang
this class mediates it Skin Encapsulates a look and feel for the wiki All of the functions that render HTML and make choices about how to render it are here and are called from various other places when and is meant to be subclassed with other skins that may override some of its functions The User object contains a reference to a and so rather than having a global skin object we just rely on the global User and get the skin with $wgUser and also has some character encoding functions and other locale stuff The current user interface language is instantiated as and the content language as $wgContLang
Definition: design.txt:57