55 if ( $p[
'tablePrefix'] ==
'get from global' ) {
58 $p[
'tablePrefix'] = strtoupper( $p[
'tablePrefix'] );
59 parent::__construct( $p );
60 Hooks::run(
'DatabaseOraclePostInit', [ $this ] );
64 if ( $this->mOpened ) {
65 MediaWiki\suppressWarnings();
67 MediaWiki\restoreWarnings();
92 function open( $server, $user, $password, $dbName ) {
94 if ( !function_exists(
'oci_connect' ) ) {
97 "Oracle functions missing, have you compiled PHP with the --with-oci8 option?\n " .
98 "(Note: if you recently installed PHP, you may need to restart your webserver\n " .
103 $this->mUser =
$user;
104 $this->mPassword = $password;
110 $this->mServer = $dbName;
111 $this->mDBname =
$user;
113 $this->mServer = $server;
115 $this->mDBname =
$user;
117 $this->mDBname = $dbName;
121 if ( !strlen(
$user ) ) { #
e.g. the
class is being loaded
129 $session_mode = $this->mFlags &
DBO_SYSDBA ? OCI_SYSDBA : OCI_DEFAULT;
131 MediaWiki\suppressWarnings();
133 $this->mConn = oci_pconnect(
137 $this->defaultCharset,
141 $this->mConn = oci_new_connect(
145 $this->defaultCharset,
149 $this->mConn = oci_connect(
153 $this->defaultCharset,
157 MediaWiki\restoreWarnings();
159 if ( $this->mUser != $this->mDBname ) {
164 if ( !$this->mConn ) {
168 $this->mOpened =
true;
170 # removed putenv calls because they interfere with the system globaly
171 $this->
doQuery(
'ALTER SESSION SET NLS_TIMESTAMP_FORMAT=\'DD-MM-YYYY HH24:MI:SS.FF6\'' );
172 $this->
doQuery(
'ALTER SESSION SET NLS_TIMESTAMP_TZ_FORMAT=\'DD-MM-YYYY HH24:MI:SS.FF6\'' );
173 $this->
doQuery(
'ALTER SESSION SET NLS_NUMERIC_CHARACTERS=\'.,\'' );
184 return oci_close( $this->mConn );
188 return $this->mTrxLevel ? OCI_NO_AUTO_COMMIT : OCI_COMMIT_ON_SUCCESS;
194 throw new InvalidArgumentException(
"SQL encoding is invalid\n$sql" );
200 $sql = preg_replace(
'/ as /i',
' ', $sql );
205 $union_unique = ( preg_match(
'/\/\* UNION_UNIQUE \*\/ /', $sql ) != 0 );
212 'EXPLAIN PLAN SET STATEMENT_ID = \'' . $explain_id .
'\' FOR
',
218 MediaWiki\suppressWarnings();
220 $this->mLastResult = $stmt = oci_parse( $this->mConn, $sql );
221 if ( $stmt === false ) {
222 $e = oci_error( $this->mConn );
223 $this->reportQueryError( $e['message'], $e['code'], $sql, __METHOD__ );
228 if ( !oci_execute( $stmt, $this->execFlags() ) ) {
229 $e = oci_error( $stmt );
230 if ( !$this->ignoreDupValOnIndex || $e['code'] != '1
' ) {
231 $this->reportQueryError( $e['message'], $e['code'], $sql, __METHOD__ );
237 MediaWiki\restoreWarnings();
239 if ( $explain_count > 0 ) {
240 return $this->doQuery( 'SELECT
id, cardinality
"ROWS" FROM plan_table
' .
241 'WHERE statement_id = \
'' . $explain_id .
'\'' );
242 } elseif ( oci_statement_type( $stmt ) ==
'SELECT' ) {
243 return new ORAResult( $this, $stmt, $union_unique );
245 $this->mAffectedRows = oci_num_rows( $stmt );
276 return $res->fetchObject();
288 return $res->fetchRow();
300 return $res->numRows();
312 return $res->numFields();
316 return oci_field_name( $stmt, $n );
320 $res = $this->
query(
"SELECT lastval_pkg.getLastval FROM dual" );
321 $row = $this->fetchRow(
$res );
322 return is_null( $row[0] ) ? null : (int)$row[0];
333 $res->result->seek( $row );
338 if ( $this->mConn ===
false ) {
341 $e = oci_error( $this->mConn );
344 return $e[
'message'];
348 if ( $this->mConn ===
false ) {
351 $e = oci_error( $this->mConn );
358 return $this->mAffectedRows;
378 if ( !count( $a ) ) {
386 if ( in_array(
'IGNORE',
$options ) ) {
387 $this->ignoreDupValOnIndex =
true;
390 if ( !is_array( reset( $a ) ) ) {
394 foreach ( $a
as &$row ) {
395 $this->insertOneRow( $table, $row,
$fname );
399 if ( in_array(
'IGNORE',
$options ) ) {
400 $this->ignoreDupValOnIndex =
false;
407 $col_info = $this->fieldInfoMulti( $table, $col );
408 $col_type = $col_info !=
false ? $col_info->type() :
'CONSTANT';
411 if ( is_numeric( $col ) ) {
416 } elseif ( $includeCol ) {
420 if ( $val ==
'' && $val !== 0 && $col_type !=
'BLOB' && $col_type !=
'CLOB' ) {
424 if ( $val ===
'NULL' ) {
428 if ( $val ===
null ) {
429 if ( $col_info !=
false && $col_info->isNullable() == 0 && $col_info->defaultValue() !=
null ) {
453 $sql =
"INSERT INTO " . $table .
" (" . implode(
',', array_keys( $row ) ) .
')';
458 foreach ( $row
as $col => &$val ) {
464 if ( $this->isQuotedIdentifier( $val ) ) {
465 $sql .= $this->removeIdentifierQuotes( $val );
468 $sql .= $this->fieldBindStatement( $table, $col, $val );
473 $this->mLastResult = $stmt = oci_parse( $this->mConn, $sql );
474 if ( $stmt ===
false ) {
475 $e = oci_error( $this->mConn );
476 $this->reportQueryError(
$e[
'message'],
$e[
'code'], $sql, __METHOD__ );
480 foreach ( $row
as $col => &$val ) {
481 $col_info = $this->fieldInfoMulti( $table, $col );
482 $col_type = $col_info !=
false ? $col_info->type() :
'CONSTANT';
484 if ( $val ===
null ) {
486 } elseif ( $col_type !=
'BLOB' && $col_type !=
'CLOB' ) {
487 if ( is_object( $val ) ) {
488 $val = $val->fetch();
492 if ( preg_match(
'/^timestamp.*/i', $col_type ) == 1 && strtolower( $val ) ==
'infinity' ) {
493 $val = $this->getInfinity();
497 if ( oci_bind_by_name( $stmt,
":$col", $val, -1, SQLT_CHR ) ===
false ) {
498 $e = oci_error( $stmt );
499 $this->reportQueryError(
$e[
'message'],
$e[
'code'], $sql, __METHOD__ );
505 $lob[$col] = oci_new_descriptor( $this->mConn, OCI_D_LOB );
506 if ( $lob[$col] ===
false ) {
507 $e = oci_error( $stmt );
511 if ( is_object( $val ) ) {
512 $val = $val->fetch();
515 if ( $col_type ==
'BLOB' ) {
516 $lob[$col]->writeTemporary( $val, OCI_TEMP_BLOB );
517 oci_bind_by_name( $stmt,
":$col", $lob[$col], -1, OCI_B_BLOB );
519 $lob[$col]->writeTemporary( $val, OCI_TEMP_CLOB );
520 oci_bind_by_name( $stmt,
":$col", $lob[$col], -1, OCI_B_CLOB );
525 MediaWiki\suppressWarnings();
527 if ( oci_execute( $stmt, $this->execFlags() ) ===
false ) {
528 $e = oci_error( $stmt );
529 if ( !$this->ignoreDupValOnIndex ||
$e[
'code'] !=
'1' ) {
530 $this->reportQueryError(
$e[
'message'],
$e[
'code'], $sql, __METHOD__ );
534 $this->mAffectedRows = oci_num_rows( $stmt );
537 $this->mAffectedRows = oci_num_rows( $stmt );
540 MediaWiki\restoreWarnings();
542 if ( isset( $lob ) ) {
543 foreach ( $lob
as $lob_v ) {
548 if ( !$this->mTrxLevel ) {
549 oci_commit( $this->mConn );
552 return oci_free_statement( $stmt );
556 $insertOptions = [], $selectOptions = [], $selectJoinConds = []
558 $destTable = $this->
tableName( $destTable );
560 $sequenceData = $this->getSequenceData( $destTable );
561 if ( $sequenceData !==
false &&
562 !isset( $varMap[$sequenceData[
'column']] )
564 $varMap[$sequenceData[
'column']] =
'GET_SEQUENCE_VALUE(\'' . $sequenceData[
'sequence'] .
'\')
';
567 // count-alias subselect fields to avoid abigious definition errors
569 foreach ( $varMap as &$val ) {
570 $val = $val . ' field
' . ( $i++ );
573 $selectSql = $this->selectSQLText(
575 array_values( $varMap ),
582 $sql = "INSERT INTO $destTable (" . implode( ',
', array_keys( $varMap ) ) . ')
' . $selectSql;
584 if ( in_array( 'IGNORE
', $insertOptions ) ) {
585 $this->ignoreDupValOnIndex = true;
588 $retval = $this->query( $sql, $fname );
590 if ( in_array( 'IGNORE
', $insertOptions ) ) {
591 $this->ignoreDupValOnIndex = false;
597 public function upsert( $table, array $rows, array $uniqueIndexes, array $set,
600 if ( !count( $rows ) ) {
601 return true; // nothing to do
604 if ( !is_array( reset( $rows ) ) ) {
608 $sequenceData = $this->getSequenceData( $table );
609 if ( $sequenceData !== false ) {
610 // add sequence column to each list of columns, when not set
611 foreach ( $rows as &$row ) {
612 if ( !isset( $row[$sequenceData['column']] ) ) {
613 $row[$sequenceData['column']] =
614 $this->addIdentifierQuotes( 'GET_SEQUENCE_VALUE(\
'' .
615 $sequenceData[
'sequence'] .
'\')
' );
620 return parent::upsert( $table, $rows, $uniqueIndexes, $set, $fname );
623 function tableName( $name, $format = 'quoted
' ) {
625 Replace reserved words with better ones
626 Using uppercase because that's the only way Oracle can handle
634 $name =
'PAGECONTENT';
638 return strtoupper( parent::tableName( $name, $format ) );
644 return preg_replace(
'/.*\.(.*)/',
'$1',
$name );
654 if ( $this->sequenceData ==
null ) {
655 $result = $this->doQuery(
"SELECT lower(asq.sequence_name),
656 lower(atc.table_name),
657 lower(atc.column_name)
658 FROM all_sequences asq, all_tab_columns atc
661 '{$this->mTablePrefix}MWUSER',
662 '{$this->mTablePrefix}USER',
665 atc.column_name || '_SEQ' = '{$this->mTablePrefix}' || asq.sequence_name
666 AND asq.sequence_owner = upper('{$this->mDBname}')
667 AND atc.owner = upper('{$this->mDBname}')" );
669 while ( ( $row =
$result->fetchRow() ) !==
false ) {
670 $this->sequenceData[$row[1]] = [
671 'sequence' => $row[0],
676 $table = strtolower( $this->removeIdentifierQuotes( $this->
tableName( $table ) ) );
678 return ( isset( $this->sequenceData[$table] ) ) ? $this->sequenceData[$table] :
false;
689 $fieldInfoData = $this->fieldInfo( $table, $field );
691 return $fieldInfoData->maxLength();
695 if ( $offset ===
false ) {
699 return "SELECT * FROM ($sql) WHERE rownum >= (1 + $offset) AND rownum < (1 + $limit + $offset)";
703 return new Blob( $b );
707 if ( $b instanceof
Blob ) {
715 $glue =
' UNION ALL ';
717 return 'SELECT * ' . ( $all ?
'' :
'/* UNION_UNIQUE */ ' ) .
718 'FROM (' . implode( $glue, $sqls ) .
')';
722 return $this->lastErrno() ==
'OCI-00060';
728 $temporary = $temporary ?
'TRUE' :
'FALSE';
730 $newName = strtoupper( $newName );
731 $oldName = strtoupper( $oldName );
733 $tabName = substr( $newName, strlen( $this->mTablePrefix ) );
734 $oldPrefix = substr( $oldName, 0, strlen( $oldName ) - strlen( $tabName ) );
735 $newPrefix = strtoupper( $this->mTablePrefix );
737 return $this->doQuery(
"BEGIN DUPLICATE_TABLE( '$tabName', " .
738 "'$oldPrefix', '$newPrefix', $temporary ); END;" );
743 if ( !empty( $prefix ) ) {
744 $listWhere =
' AND table_name LIKE \'' . strtoupper( $prefix ) .
'%\'';
747 $owner = strtoupper( $this->mDBname );
748 $result = $this->doQuery(
"SELECT table_name FROM all_tables " .
749 "WHERE owner='$owner' AND table_name NOT LIKE '%!_IDX\$_' ESCAPE '!' $listWhere" );
753 $endArray[] = strtoupper( $prefix .
'MWUSER' );
754 $endArray[] = strtoupper( $prefix .
'PAGE' );
755 $endArray[] = strtoupper( $prefix .
'IMAGE' );
756 $fixedOrderTabs = $endArray;
757 while ( ( $row =
$result->fetchRow() ) !==
false ) {
758 if ( !in_array( $row[
'table_name'], $fixedOrderTabs ) ) {
759 $endArray[] = $row[
'table_name'];
766 public function dropTable( $tableName, $fName = __METHOD__ ) {
767 $tableName = $this->
tableName( $tableName );
768 if ( !$this->tableExists( $tableName ) ) {
772 return $this->doQuery(
"DROP TABLE $tableName CASCADE CONSTRAINTS PURGE" );
794 return '[{{int:version-db-oracle-url}} Oracle]';
802 $rset = $this->doQuery(
803 'SELECT version FROM product_component_version ' .
804 'WHERE UPPER(product) LIKE \'ORACLE DATABASE%\''
806 $row = $rset->fetchRow();
808 return oci_server_version( $this->mConn );
811 return $row[
'version'];
823 $table = strtoupper( $this->removeIdentifierQuotes( $table ) );
824 $index = strtoupper( $index );
825 $owner = strtoupper( $this->mDBname );
826 $sql =
"SELECT 1 FROM all_indexes WHERE owner='$owner' AND index_name='{$table}_{$index}'";
827 $res = $this->doQuery( $sql );
829 $count =
$res->numRows();
846 $table = $this->addQuotes( strtoupper( $this->removeIdentifierQuotes( $table ) ) );
847 $owner = $this->addQuotes( strtoupper( $this->mDBname ) );
848 $sql =
"SELECT 1 FROM all_tables WHERE owner=$owner AND table_name=$table";
849 $res = $this->doQuery( $sql );
850 if (
$res &&
$res->numRows() > 0 ) {
872 $field = strtoupper( $field );
873 if ( is_array( $table ) ) {
874 $table = array_map( [ $this,
'tableNameInternal' ], $table );
875 $tableWhere =
'IN (';
876 foreach ( $table
as &$singleTable ) {
877 $singleTable = $this->removeIdentifierQuotes( $singleTable );
878 if ( isset( $this->mFieldInfoCache[
"$singleTable.$field"] ) ) {
879 return $this->mFieldInfoCache[
"$singleTable.$field"];
881 $tableWhere .=
'\'' . $singleTable .
'\',
';
883 $tableWhere = rtrim( $tableWhere, ',
' ) . ')
';
885 $table = $this->removeIdentifierQuotes( $this->tableNameInternal( $table ) );
886 if ( isset( $this->mFieldInfoCache["$table.$field"] ) ) {
887 return $this->mFieldInfoCache["$table.$field"];
889 $tableWhere = '= \
'' . $table .
'\'';
892 $fieldInfoStmt = oci_parse(
894 'SELECT * FROM wiki_field_info_full WHERE table_name ' .
895 $tableWhere .
' and column_name = \'' . $field .
'\''
897 if ( oci_execute( $fieldInfoStmt, $this->execFlags() ) ===
false ) {
898 $e = oci_error( $fieldInfoStmt );
899 $this->reportQueryError(
$e[
'message'],
$e[
'code'],
'fieldInfo QUERY', __METHOD__ );
904 if (
$res->numRows() == 0 ) {
905 if ( is_array( $table ) ) {
906 foreach ( $table
as &$singleTable ) {
907 $this->mFieldInfoCache[
"$singleTable.$field"] =
false;
910 $this->mFieldInfoCache[
"$table.$field"] =
false;
912 $fieldInfoTemp =
null;
915 $table = $fieldInfoTemp->tableName();
916 $this->mFieldInfoCache[
"$table.$field"] = $fieldInfoTemp;
920 return $fieldInfoTemp;
930 if ( is_array( $table ) ) {
931 throw new DBUnexpectedError( $this,
'DatabaseOracle::fieldInfo called with table array!' );
934 return $this->fieldInfoMulti( $table, $field );
938 $this->mTrxLevel = 1;
939 $this->doQuery(
'SET CONSTRAINTS ALL DEFERRED' );
943 if ( $this->mTrxLevel ) {
944 $ret = oci_commit( $this->mConn );
948 $this->mTrxLevel = 0;
949 $this->doQuery(
'SET CONSTRAINTS ALL IMMEDIATE' );
954 if ( $this->mTrxLevel ) {
955 oci_rollback( $this->mConn );
956 $this->mTrxLevel = 0;
957 $this->doQuery(
'SET CONSTRAINTS ALL IMMEDIATE' );
963 callable $lineCallback =
null,
964 callable $resultCallback =
null,
965 $fname = __METHOD__, callable $inputCallback =
null
969 $dollarquote =
false;
973 while ( !feof( $fp ) ) {
974 if ( $lineCallback ) {
975 call_user_func( $lineCallback );
977 $line = trim( fgets( $fp, 1024 ) );
978 $sl = strlen(
$line ) - 1;
988 if ( substr(
$line, 0, 8 ) ==
'/*$mw$*/' ) {
989 if ( $dollarquote ) {
990 $dollarquote =
false;
996 } elseif ( !$dollarquote ) {
997 if (
';' ==
$line[$sl] && ( $sl < 2 ||
';' !=
$line[$sl - 1] ) ) {
1009 $cmd = str_replace(
';;',
";", $cmd );
1010 if ( strtolower( substr( $cmd, 0, 6 ) ) ==
'define' ) {
1011 if ( preg_match(
'/^define\s*([^\s=]*)\s*=\s*\'\{\$([^\}]*)\}\'/', $cmd, $defines ) ) {
1012 $replacements[$defines[2]] = $defines[1];
1015 foreach ( $replacements
as $mwVar => $scVar ) {
1016 $cmd = str_replace(
'&' . $scVar .
'.',
'`{$' . $mwVar .
'}`', $cmd );
1019 $cmd = $this->replaceVars( $cmd );
1020 if ( $inputCallback ) {
1021 call_user_func( $inputCallback, $cmd );
1023 $res = $this->doQuery( $cmd );
1024 if ( $resultCallback ) {
1025 call_user_func( $resultCallback,
$res, $this );
1028 if (
false ===
$res ) {
1029 $err = $this->lastError();
1031 return "Query \"{$cmd}\" failed with error code \"$err\".\n";
1044 $this->mDBname = $db;
1045 if ( $db ==
null || $db == $this->mUser ) {
1048 $sql =
'ALTER SESSION SET CURRENT_SCHEMA=' . strtoupper( $db );
1049 $stmt = oci_parse( $this->mConn, $sql );
1050 MediaWiki\suppressWarnings();
1052 MediaWiki\restoreWarnings();
1054 $e = oci_error( $stmt );
1055 if (
$e[
'code'] !=
'1435' ) {
1056 $this->reportQueryError(
$e[
'message'],
$e[
'code'], $sql, __METHOD__ );
1066 return str_replace(
"'",
"''",
$s );
1075 return "'" . $this->strencode(
$s ) .
"'";
1087 return strpos(
$s,
'/*Q*/' ) ===
false ?
$s : substr(
$s, 5 );
1091 return strpos(
$s,
'/*Q*/' ) !==
false;
1097 $col_info = $this->fieldInfoMulti( $table, $col );
1098 $col_type = $col_info !=
false ? $col_info->type() :
'CONSTANT';
1099 if ( $col_type ==
'CLOB' ) {
1100 $col =
'TO_CHAR(' . $col .
')';
1102 } elseif ( $col_type ==
'VARCHAR2' ) {
1109 foreach ( $conds
as $col => $val ) {
1110 if ( is_array( $val ) ) {
1111 $conds2[$col] = $this->wrapConditionsForWhere( $table, $val, $col );
1113 if ( is_numeric( $col ) && $parentCol !=
null ) {
1114 $this->wrapFieldForWhere( $table, $parentCol, $val );
1116 $this->wrapFieldForWhere( $table, $col, $val );
1118 $conds2[$col] = $val;
1128 if ( is_array( $conds ) ) {
1129 $conds = $this->wrapConditionsForWhere( $table, $conds );
1144 $preLimitTail = $postLimitTail =
'';
1149 if ( is_numeric( $key ) ) {
1150 $noKeyOptions[$option] =
true;
1154 $preLimitTail .= $this->makeGroupByWithHaving(
$options );
1156 $preLimitTail .= $this->makeOrderBy(
$options );
1158 if ( isset( $noKeyOptions[
'FOR UPDATE'] ) ) {
1159 $postLimitTail .=
' FOR UPDATE';
1162 if ( isset( $noKeyOptions[
'DISTINCT'] ) || isset( $noKeyOptions[
'DISTINCTROW'] ) ) {
1163 $startOpts .=
'DISTINCT';
1166 if ( isset(
$options[
'USE INDEX'] ) && !is_array(
$options[
'USE INDEX'] ) ) {
1167 $useIndex = $this->useIndexClause(
$options[
'USE INDEX'] );
1172 if ( isset(
$options[
'IGNORE INDEX'] ) && !is_array(
$options[
'IGNORE INDEX'] ) ) {
1173 $ignoreIndex = $this->ignoreIndexClause(
$options[
'IGNORE INDEX'] );
1178 return [ $startOpts, $useIndex, $preLimitTail, $postLimitTail, $ignoreIndex ];
1181 public function delete( $table, $conds,
$fname = __METHOD__ ) {
1182 if ( is_array( $conds ) ) {
1183 $conds = $this->wrapConditionsForWhere( $table, $conds );
1188 if ( $table == $this->
tableName(
'user' ) ) {
1189 $this->update(
'archive', [
'ar_user' => 0 ],
1190 [
'ar_user' => $conds[
'user_id'] ],
$fname );
1191 $this->update(
'ipblocks', [
'ipb_user' => 0 ],
1192 [
'ipb_user' => $conds[
'user_id'] ],
$fname );
1193 $this->update(
'image', [
'img_user' => 0 ],
1194 [
'img_user' => $conds[
'user_id'] ],
$fname );
1195 $this->update(
'oldimage', [
'oi_user' => 0 ],
1196 [
'oi_user' => $conds[
'user_id'] ],
$fname );
1197 $this->update(
'filearchive', [
'fa_deleted_user' => 0 ],
1198 [
'fa_deleted_user' => $conds[
'user_id'] ],
$fname );
1199 $this->update(
'filearchive', [
'fa_user' => 0 ],
1200 [
'fa_user' => $conds[
'user_id'] ],
$fname );
1201 $this->update(
'uploadstash', [
'us_user' => 0 ],
1202 [
'us_user' => $conds[
'user_id'] ],
$fname );
1203 $this->update(
'recentchanges', [
'rc_user' => 0 ],
1204 [
'rc_user' => $conds[
'user_id'] ],
$fname );
1205 $this->update(
'logging', [
'log_user' => 0 ],
1206 [
'log_user' => $conds[
'user_id'] ],
$fname );
1207 } elseif ( $table == $this->
tableName(
'image' ) ) {
1208 $this->update(
'oldimage', [
'oi_name' => 0 ],
1209 [
'oi_name' => $conds[
'img_name'] ],
$fname );
1212 return parent::delete( $table, $conds,
$fname );
1228 $opts = $this->makeUpdateOptions(
$options );
1229 $sql =
"UPDATE $opts $table SET ";
1232 foreach ( $values
as $col => &$val ) {
1233 $sqlSet = $this->fieldBindStatement( $table, $col, $val,
true );
1236 $sqlSet =
', ' . $sqlSet;
1243 if ( $conds !== [] && $conds !==
'*' ) {
1244 $conds = $this->wrapConditionsForWhere( $table, $conds );
1245 $sql .=
' WHERE ' . $this->makeList( $conds,
LIST_AND );
1248 $this->mLastResult = $stmt = oci_parse( $this->mConn, $sql );
1249 if ( $stmt ===
false ) {
1250 $e = oci_error( $this->mConn );
1251 $this->reportQueryError(
$e[
'message'],
$e[
'code'], $sql, __METHOD__ );
1255 foreach ( $values
as $col => &$val ) {
1256 $col_info = $this->fieldInfoMulti( $table, $col );
1257 $col_type = $col_info !=
false ? $col_info->type() :
'CONSTANT';
1259 if ( $val ===
null ) {
1261 } elseif ( $col_type !=
'BLOB' && $col_type !=
'CLOB' ) {
1262 if ( is_object( $val ) ) {
1263 $val = $val->getData();
1266 if ( preg_match(
'/^timestamp.*/i', $col_type ) == 1 && strtolower( $val ) ==
'infinity' ) {
1267 $val =
'31-12-2030 12:00:00.000000';
1271 if ( oci_bind_by_name( $stmt,
":$col", $val ) ===
false ) {
1272 $e = oci_error( $stmt );
1273 $this->reportQueryError(
$e[
'message'],
$e[
'code'], $sql, __METHOD__ );
1279 $lob[$col] = oci_new_descriptor( $this->mConn, OCI_D_LOB );
1280 if ( $lob[$col] ===
false ) {
1281 $e = oci_error( $stmt );
1285 if ( is_object( $val ) ) {
1286 $val = $val->getData();
1289 if ( $col_type ==
'BLOB' ) {
1290 $lob[$col]->writeTemporary( $val );
1291 oci_bind_by_name( $stmt,
":$col", $lob[$col], -1, SQLT_BLOB );
1293 $lob[$col]->writeTemporary( $val );
1294 oci_bind_by_name( $stmt,
":$col", $lob[$col], -1, OCI_B_CLOB );
1299 MediaWiki\suppressWarnings();
1301 if ( oci_execute( $stmt, $this->execFlags() ) ===
false ) {
1302 $e = oci_error( $stmt );
1303 if ( !$this->ignoreDupValOnIndex ||
$e[
'code'] !=
'1' ) {
1304 $this->reportQueryError(
$e[
'message'],
$e[
'code'], $sql, __METHOD__ );
1308 $this->mAffectedRows = oci_num_rows( $stmt );
1311 $this->mAffectedRows = oci_num_rows( $stmt );
1314 MediaWiki\restoreWarnings();
1316 if ( isset( $lob ) ) {
1317 foreach ( $lob
as $lob_v ) {
1322 if ( !$this->mTrxLevel ) {
1323 oci_commit( $this->mConn );
1326 return oci_free_statement( $stmt );
1331 return 'BITNOT(' . $field .
')';
1335 return 'BITAND(' . $fieldLeft .
', ' . $fieldRight .
')';
1338 function bitOr( $fieldLeft, $fieldRight ) {
1339 return 'BITOR(' . $fieldLeft .
', ' . $fieldRight .
')';
1343 return $this->mDBname;
1347 return $this->mServer;
1351 $delim, $table, $field, $conds =
'', $join_conds = []
1353 $fld =
"LISTAGG($field," . $this->addQuotes( $delim ) .
") WITHIN GROUP (ORDER BY $field)";
1355 return '(' . $this->selectSQLText( $table, $fld, $conds,
null, [], $join_conds ) .
')';
1364 return 'CAST ( ' . $field .
' AS VARCHAR2 )';
1368 return '31-12-2030 12:00:00.000000';
Apache License January AND DISTRIBUTION Definitions License shall mean the terms and conditions for use
$wgDBprefix
Table name prefix.
$wgDBOracleDRCP
Set true to enable Oracle DCRP (supported from 11gR1 onward)
wfDebug( $text, $dest='all', array $context=[])
Sends a line to the debug log if enabled or, optionally, to a comment in output.
wfTimestamp( $outputtype=TS_UNIX, $ts=0)
Get a timestamp string in one of various formats.
return[ 'DBLoadBalancerFactory'=> function(MediaWikiServices $services) { $mainConfig=$services->getMainConfig();$lbConf=MWLBFactory::applyDefaultConfig($mainConfig->get( 'LBFactoryConf'), $mainConfig, $services->getConfiguredReadOnlyMode());$class=MWLBFactory::getLBFactoryClass( $lbConf);return new $class( $lbConf);}, 'DBLoadBalancer'=> function(MediaWikiServices $services) { return $services->getDBLoadBalancerFactory() ->getMainLB();}, 'SiteStore'=> function(MediaWikiServices $services) { $rawSiteStore=new DBSiteStore( $services->getDBLoadBalancer());$cache=wfGetCache(wfIsHHVM() ? CACHE_ACCEL :CACHE_ANYTHING);return new CachingSiteStore( $rawSiteStore, $cache);}, 'SiteLookup'=> function(MediaWikiServices $services) { $cacheFile=$services->getMainConfig() ->get( 'SitesCacheFile');if( $cacheFile !==false) { return new FileBasedSiteLookup( $cacheFile);} else { return $services->getSiteStore();} }, 'ConfigFactory'=> function(MediaWikiServices $services) { $registry=$services->getBootstrapConfig() ->get( 'ConfigRegistry');$factory=new ConfigFactory();foreach( $registry as $name=> $callback) { $factory->register( $name, $callback);} return $factory;}, 'MainConfig'=> function(MediaWikiServices $services) { return $services->getConfigFactory() ->makeConfig( 'main');}, 'InterwikiLookup'=> function(MediaWikiServices $services) { global $wgContLang;$config=$services->getMainConfig();return new ClassicInterwikiLookup($wgContLang, $services->getMainWANObjectCache(), $config->get( 'InterwikiExpiry'), $config->get( 'InterwikiCache'), $config->get( 'InterwikiScopes'), $config->get( 'InterwikiFallbackSite'));}, 'StatsdDataFactory'=> function(MediaWikiServices $services) { return new BufferingStatsdDataFactory(rtrim( $services->getMainConfig() ->get( 'StatsdMetricPrefix'), '.'));}, 'EventRelayerGroup'=> function(MediaWikiServices $services) { return new EventRelayerGroup( $services->getMainConfig() ->get( 'EventRelayerConfig'));}, 'SearchEngineFactory'=> function(MediaWikiServices $services) { return new SearchEngineFactory( $services->getSearchEngineConfig());}, 'SearchEngineConfig'=> function(MediaWikiServices $services) { global $wgContLang;return new SearchEngineConfig( $services->getMainConfig(), $wgContLang);}, 'SkinFactory'=> function(MediaWikiServices $services) { $factory=new SkinFactory();$names=$services->getMainConfig() ->get( 'ValidSkinNames');foreach( $names as $name=> $skin) { $factory->register( $name, $skin, function() use( $name, $skin) { $class="Skin$skin";return new $class( $name);});} $factory->register( 'fallback', 'Fallback', function() { return new SkinFallback;});$factory->register( 'apioutput', 'ApiOutput', function() { return new SkinApi;});return $factory;}, 'WatchedItemStore'=> function(MediaWikiServices $services) { $store=new WatchedItemStore($services->getDBLoadBalancer(), new HashBagOStuff([ 'maxKeys'=> 100]), $services->getReadOnlyMode());$store->setStatsdDataFactory( $services->getStatsdDataFactory());return $store;}, 'WatchedItemQueryService'=> function(MediaWikiServices $services) { return new WatchedItemQueryService( $services->getDBLoadBalancer());}, 'CryptRand'=> function(MediaWikiServices $services) { $secretKey=$services->getMainConfig() ->get( 'SecretKey');return new CryptRand(['wfHostname', 'wfWikiID', function() use( $secretKey) { return $secretKey ?:'';}], defined( 'MW_CONFIG_FILE') ?[MW_CONFIG_FILE] :[], LoggerFactory::getInstance( 'CryptRand'));}, 'CryptHKDF'=> function(MediaWikiServices $services) { $config=$services->getMainConfig();$secret=$config->get( 'HKDFSecret') ?:$config->get( 'SecretKey');if(! $secret) { throw new RuntimeException("Cannot use MWCryptHKDF without a secret.");} $context=[microtime(), getmypid(), gethostname()];$cache=$services->getLocalServerObjectCache();if( $cache instanceof EmptyBagOStuff) { $cache=ObjectCache::getLocalClusterInstance();} return new CryptHKDF( $secret, $config->get( 'HKDFAlgorithm'), $cache, $context, $services->getCryptRand());}, 'MediaHandlerFactory'=> function(MediaWikiServices $services) { return new MediaHandlerFactory($services->getMainConfig() ->get( 'MediaHandlers'));}, 'MimeAnalyzer'=> function(MediaWikiServices $services) { $logger=LoggerFactory::getInstance( 'Mime');$mainConfig=$services->getMainConfig();$params=['typeFile'=> $mainConfig->get( 'MimeTypeFile'), 'infoFile'=> $mainConfig->get( 'MimeInfoFile'), 'xmlTypes'=> $mainConfig->get( 'XMLMimeTypes'), 'guessCallback'=> function( $mimeAnalyzer, &$head, &$tail, $file, &$mime) use( $logger) { $deja=new DjVuImage( $file);if( $deja->isValid()) { $logger->info(__METHOD__ . ": detected $file as image/vnd.djvu\n");$mime='image/vnd.djvu';return;} Hooks::run('MimeMagicGuessFromContent', [ $mimeAnalyzer, &$head, &$tail, $file, &$mime]);}, 'extCallback'=> function( $mimeAnalyzer, $ext, &$mime) { Hooks::run( 'MimeMagicImproveFromExtension', [ $mimeAnalyzer, $ext, &$mime]);}, 'initCallback'=> function( $mimeAnalyzer) { Hooks::run( 'MimeMagicInit', [ $mimeAnalyzer]);}, 'logger'=> $logger];if( $params['infoFile']==='includes/mime.info') { $params['infoFile']=__DIR__ . "/libs/mime/mime.info";} if( $params['typeFile']==='includes/mime.types') { $params['typeFile']=__DIR__ . "/libs/mime/mime.types";} $detectorCmd=$mainConfig->get( 'MimeDetectorCommand');if( $detectorCmd) { $params['detectCallback']=function( $file) use( $detectorCmd) { return wfShellExec("$detectorCmd " . wfEscapeShellArg( $file));};} return new MimeMagic( $params);}, 'ProxyLookup'=> function(MediaWikiServices $services) { $mainConfig=$services->getMainConfig();return new ProxyLookup($mainConfig->get( 'SquidServers'), $mainConfig->get( 'SquidServersNoPurge'));}, 'Parser'=> function(MediaWikiServices $services) { $conf=$services->getMainConfig() ->get( 'ParserConf');return ObjectFactory::constructClassInstance( $conf['class'], [ $conf]);}, 'ParserCache'=> function(MediaWikiServices $services) { $config=$services->getMainConfig();$cache=ObjectCache::getInstance( $config->get( 'ParserCacheType'));wfDebugLog( 'caches', 'parser:' . get_class( $cache));return new ParserCache($cache, $config->get( 'CacheEpoch'));}, 'LinkCache'=> function(MediaWikiServices $services) { return new LinkCache($services->getTitleFormatter(), $services->getMainWANObjectCache());}, 'LinkRendererFactory'=> function(MediaWikiServices $services) { return new LinkRendererFactory($services->getTitleFormatter(), $services->getLinkCache());}, 'LinkRenderer'=> function(MediaWikiServices $services) { global $wgUser;if(defined( 'MW_NO_SESSION')) { return $services->getLinkRendererFactory() ->create();} else { return $services->getLinkRendererFactory() ->createForUser( $wgUser);} }, 'GenderCache'=> function(MediaWikiServices $services) { return new GenderCache();}, '_MediaWikiTitleCodec'=> function(MediaWikiServices $services) { global $wgContLang;return new MediaWikiTitleCodec($wgContLang, $services->getGenderCache(), $services->getMainConfig() ->get( 'LocalInterwikis'));}, 'TitleFormatter'=> function(MediaWikiServices $services) { return $services->getService( '_MediaWikiTitleCodec');}, 'TitleParser'=> function(MediaWikiServices $services) { return $services->getService( '_MediaWikiTitleCodec');}, 'MainObjectStash'=> function(MediaWikiServices $services) { $mainConfig=$services->getMainConfig();$id=$mainConfig->get( 'MainStash');if(!isset( $mainConfig->get( 'ObjectCaches')[$id])) { throw new UnexpectedValueException("Cache type \"$id\" is not present in \$wgObjectCaches.");} return \ObjectCache::newFromParams( $mainConfig->get( 'ObjectCaches')[$id]);}, 'MainWANObjectCache'=> function(MediaWikiServices $services) { $mainConfig=$services->getMainConfig();$id=$mainConfig->get( 'MainWANCache');if(!isset( $mainConfig->get( 'WANObjectCaches')[$id])) { throw new UnexpectedValueException("WAN cache type \"$id\" is not present in \$wgWANObjectCaches.");} $params=$mainConfig->get( 'WANObjectCaches')[$id];$objectCacheId=$params['cacheId'];if(!isset( $mainConfig->get( 'ObjectCaches')[$objectCacheId])) { throw new UnexpectedValueException("Cache type \"$objectCacheId\" is not present in \$wgObjectCaches.");} $params['store']=$mainConfig->get( 'ObjectCaches')[$objectCacheId];return \ObjectCache::newWANCacheFromParams( $params);}, 'LocalServerObjectCache'=> function(MediaWikiServices $services) { $mainConfig=$services->getMainConfig();if(function_exists( 'apc_fetch')) { $id='apc';} elseif(function_exists( 'apcu_fetch')) { $id='apcu';} elseif(function_exists( 'xcache_get') &&wfIniGetBool( 'xcache.var_size')) { $id='xcache';} elseif(function_exists( 'wincache_ucache_get')) { $id='wincache';} else { $id=CACHE_NONE;} if(!isset( $mainConfig->get( 'ObjectCaches')[$id])) { throw new UnexpectedValueException("Cache type \"$id\" is not present in \$wgObjectCaches.");} return \ObjectCache::newFromParams( $mainConfig->get( 'ObjectCaches')[$id]);}, 'VirtualRESTServiceClient'=> function(MediaWikiServices $services) { $config=$services->getMainConfig() ->get( 'VirtualRestConfig');$vrsClient=new VirtualRESTServiceClient(new MultiHttpClient([]));foreach( $config['paths'] as $prefix=> $serviceConfig) { $class=$serviceConfig['class'];$constructArg=isset( $serviceConfig['options']) ? $serviceConfig['options'] :[];$constructArg+=$config['global'];$vrsClient->mount( $prefix, [ 'class'=> $class, 'config'=> $constructArg]);} return $vrsClient;}, 'ConfiguredReadOnlyMode'=> function(MediaWikiServices $services) { return new ConfiguredReadOnlyMode( $services->getMainConfig());}, 'ReadOnlyMode'=> function(MediaWikiServices $services) { return new ReadOnlyMode($services->getConfiguredReadOnlyMode(), $services->getDBLoadBalancer());}, 'ShellCommandFactory'=> function(MediaWikiServices $services) { $config=$services->getMainConfig();$limits=['time'=> $config->get( 'MaxShellTime'), 'walltime'=> $config->get( 'MaxShellWallClockTime'), 'memory'=> $config->get( 'MaxShellMemory'), 'filesize'=> $config->get( 'MaxShellFileSize'),];$cgroup=$config->get( 'ShellCgroup');$factory=new CommandFactory( $limits, $cgroup);$factory->setLogger(LoggerFactory::getInstance( 'exec'));return $factory;},]
if(!defined( 'MEDIAWIKI')) $fname
This file is not a valid entry point, perform no further processing unless MEDIAWIKI is defined.
duplicateTableStructure( $oldName, $newName, $temporary=false, $fname=__METHOD__)
Creates a new table with structure copied from existing table.
removeIdentifierQuotes( $s)
doBegin( $fname=__METHOD__)
Issues the BEGIN command to the database server.
lastErrno()
Get the last error number.
addIdentifierQuotes( $s)
Quotes an identifier using backticks or "double quotes" depending on the database type.
bitAnd( $fieldLeft, $fieldRight)
wrapFieldForWhere( $table, &$col, &$val)
indexExists( $table, $index, $fname=__METHOD__)
Query whether a given index exists.
indexInfo( $table, $index, $fname=__METHOD__)
Returns information about an index If errors are explicitly ignored, returns NULL on failure.
bitOr( $fieldLeft, $fieldRight)
buildGroupConcatField( $delim, $table, $field, $conds='', $join_conds=[])
Build a GROUP_CONCAT or equivalent statement for a query.
getType()
Get the type of the DBMS, as it appears in $wgDBtype.
selectDB( $db)
Change the current database.
doRollback( $fname=__METHOD__)
Issues the ROLLBACK command to the database server.
strencode( $s)
Wrapper for addslashes()
affectedRows()
Get the number of rows affected by the last write query.
listTables( $prefix=null, $fname=__METHOD__)
List all tables on the database.
makeSelectOptions( $options)
Returns an optional USE INDEX clause to go after the table, and a string to go at the end of the quer...
fieldInfoMulti( $table, $field)
Function translates mysql_fetch_field() functionality on ORACLE.
fieldInfo( $table, $field)
textFieldSize( $table, $field)
Returns the size of a text field, or -1 for "unlimited".
implicitOrderby()
Returns true if this database does an implicit order by when the column has an index For example: SEL...
encodeBlob( $b)
Some DBMSs have a special format for inserting into blob fields, they don't allow simple quoted strin...
int $mAffectedRows
The number of rows affected as an integer.
addQuotes( $s)
Adds quotes and backslashes.
doCommit( $fname=__METHOD__)
Issues the COMMIT command to the database server.
queryIgnore( $sql, $fname='')
getSequenceData( $table)
Return sequence_name if table has a sequence.
lastError()
Get a description of the last error.
getDBname()
Get the current DB name.
decodeBlob( $b)
Some DBMSs return a special placeholder object representing blob fields in result objects.
insertOneRow( $table, $row, $fname)
string $defaultCharset
Character set for Oracle database.
__destruct()
Run a few simple sanity checks and close dangling connections.
dropTable( $tableName, $fName=__METHOD__)
Delete a table.
implicitGroupby()
Returns true if this database does an implicit sort when doing GROUP BY.
insertId()
Get the inserted value of an auto-increment row.
closeConnection()
Closes a database connection, if it is open Returns success, true if already closed.
bool $ignoreDupValOnIndex
limitResult( $sql, $limit, $offset=false)
Construct a LIMIT query with optional offset.
sourceStream( $fp, callable $lineCallback=null, callable $resultCallback=null, $fname=__METHOD__, callable $inputCallback=null)
Read and execute commands from an open file handle.
getServer()
Get the server hostname or IP address.
wasDeadlock()
Determines if the last failure was due to a deadlock.
tableExists( $table, $fname=__METHOD__)
Query whether a given table exists (in the given schema, or the default mw one if not given)
tableNameInternal( $name)
update( $table, $values, $conds, $fname=__METHOD__, $options=[])
indexUnique( $table, $index, $fname=__METHOD__)
fieldBindStatement( $table, $col, &$val, $includeCol=false)
insert( $table, $a, $fname=__METHOD__, $options=[])
INSERT wrapper, inserts an array into a table.
timestamp( $ts=0)
Convert a timestamp in one of the formats accepted by wfTimestamp() to the format used for inserting ...
doQuery( $sql)
The DBMS-dependent part of query()
selectRow( $table, $vars, $conds, $fname=__METHOD__, $options=[], $join_conds=[])
Single row SELECT wrapper.
wrapConditionsForWhere( $table, $conds, $parentCol=null)
open( $server, $user, $password, $dbName)
Usually aborts on failure.
fieldName( $stmt, $n)
Get a field name in a result object.
freeResult( $res)
Frees resources associated with the LOB descriptor.
__construct(array $p)
Constructor and database handle and attempt to connect to the DB server.
unionQueries( $sqls, $all)
Construct a UNION query This is used for providing overload point for other DB abstractions not compa...
aggregateValue( $valuedata, $valuename='value')
Return aggregated value function call.
nativeInsertSelect( $destTable, $srcTable, $varMap, $conds, $fname=__METHOD__, $insertOptions=[], $selectOptions=[], $selectJoinConds=[])
Native server-side implementation of insertSelect() for situations where we don't want to select ever...
isQuotedIdentifier( $s)
Returns if the given identifier looks quoted or not according to the database convention for quoting ...
getInfinity()
Find out when 'infinity' is.
static getLocalInstance( $ts=false)
Get a timestamp instance in the server local timezone ($wgLocaltimezone)
The oci8 extension is fairly weak and doesn't support oci_num_rows, among other things.
static isUtf8( $value)
Test whether a string is valid UTF-8.
We use the convention $dbr for read and $dbw for write to help you keep track of whether the database object is a the world will explode Or to be a subsequent write query which succeeded on the master may fail when replicated to the slave due to a unique key collision Replication on the slave will stop and it may take hours to repair the database and get it back online Setting read_only in my cnf on the slave will avoid this but given the dire we prefer to have as many checks as possible We provide a but the wrapper functions like please read the documentation for except in special pages derived from QueryPage It s a common pitfall for new developers to submit code containing SQL queries which examine huge numbers of rows Remember that COUNT * is(N), counting rows in atable is like counting beans in a bucket.------------------------------------------------------------------------ Replication------------------------------------------------------------------------The largest installation of MediaWiki, Wikimedia, uses a large set ofslave MySQL servers replicating writes made to a master MySQL server. Itis important to understand the issues associated with this setup if youwant to write code destined for Wikipedia.It 's often the case that the best algorithm to use for a given taskdepends on whether or not replication is in use. Due to our unabashedWikipedia-centrism, we often just use the replication-friendly version, but if you like, you can use wfGetLB() ->getServerCount() > 1 tocheck to see if replication is in use.===Lag===Lag primarily occurs when large write queries are sent to the master.Writes on the master are executed in parallel, but they are executed inserial when they are replicated to the slaves. The master writes thequery to the binlog when the transaction is committed. The slaves pollthe binlog and start executing the query as soon as it appears. They canservice reads while they are performing a write query, but will not readanything more from the binlog and thus will perform no more writes. Thismeans that if the write query runs for a long time, the slaves will lagbehind the master for the time it takes for the write query to complete.Lag can be exacerbated by high read load. MediaWiki 's load balancer willstop sending reads to a slave when it is lagged by more than 30 seconds.If the load ratios are set incorrectly, or if there is too much loadgenerally, this may lead to a slave permanently hovering around 30seconds lag.If all slaves are lagged by more than 30 seconds, MediaWiki will stopwriting to the database. All edits and other write operations will berefused, with an error returned to the user. This gives the slaves achance to catch up. Before we had this mechanism, the slaves wouldregularly lag by several minutes, making review of recent editsdifficult.In addition to this, MediaWiki attempts to ensure that the user seesevents occurring on the wiki in chronological order. A few seconds of lagcan be tolerated, as long as the user sees a consistent picture fromsubsequent requests. This is done by saving the master binlog positionin the session, and then at the start of each request, waiting for theslave to catch up to that position before doing any reads from it. Ifthis wait times out, reads are allowed anyway, but the request isconsidered to be in "lagged slave mode". Lagged slave mode can bechecked by calling wfGetLB() ->getLaggedSlaveMode(). The onlypractical consequence at present is a warning displayed in the pagefooter.===Lag avoidance===To avoid excessive lag, queries which write large numbers of rows shouldbe split up, generally to write one row at a time. Multi-row INSERT ...SELECT queries are the worst offenders should be avoided altogether.Instead do the select first and then the insert.===Working with lag===Despite our best efforts, it 's not practical to guarantee a low-lagenvironment. Lag will usually be less than one second, but mayoccasionally be up to 30 seconds. For scalability, it 's very importantto keep load on the master low, so simply sending all your queries tothe master is not the answer. So when you have a genuine need forup-to-date data, the following approach is advised:1) Do a quick query to the master for a sequence number or timestamp 2) Run the full query on the slave and check if it matches the data you gotfrom the master 3) If it doesn 't, run the full query on the masterTo avoid swamping the master every time the slaves lag, use of thisapproach should be kept to a minimum. In most cases you should just readfrom the slave and let the user deal with the delay.------------------------------------------------------------------------ Lock contention------------------------------------------------------------------------Due to the high write rate on Wikipedia(and some other wikis), MediaWiki developers need to be very careful to structure their writesto avoid long-lasting locks. By default, MediaWiki opens a transactionat the first query, and commits it before the output is sent. Locks willbe held from the time when the query is done until the commit. So youcan reduce lock time by doing as much processing as possible before youdo your write queries.Often this approach is not good enough, and it becomes necessary toenclose small groups of queries in their own transaction. Use thefollowing syntax:$dbw=wfGetDB(DB_MASTER
We use the convention $dbr for read and $dbw for write to help you keep track of whether the database object is a the world will explode Or to be a subsequent write query which succeeded on the master may fail when replicated to the slave due to a unique key collision Replication on the slave will stop and it may take hours to repair the database and get it back online Setting read_only in my cnf on the slave will avoid this but given the dire we prefer to have as many checks as possible We provide a but the wrapper functions like please read the documentation for tableName() and addQuotes(). You will need both of them. ------------------------------------------------------------------------ Basic query optimisation ------------------------------------------------------------------------ MediaWiki developers who need to write DB queries should have some understanding of databases and the performance issues associated with them. Patches containing unacceptably slow features will not be accepted. Unindexed queries are generally not welcome in MediaWiki
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 local content language as $wgContLang
when a variable name is used in a it is silently declared as a new local masking the global
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
the array() calling protocol came about after MediaWiki 1.4rc1.
static configuration should be added through ResourceLoaderGetConfigVars instead & $vars
in this case you re responsible for computing and outputting the entire conflict i e
The index of the header message $result[1]=The index of the body text message $result[2 through n]=Parameters passed to body text message. Please note the header message cannot receive/use parameters. 'ImportHandleLogItemXMLTag':When parsing a XML tag in a log item. Return false to stop further processing of the tag $reader:XMLReader object $logInfo:Array of information 'ImportHandlePageXMLTag':When parsing a XML tag in a page. Return false to stop further processing of the tag $reader:XMLReader object & $pageInfo:Array of information 'ImportHandleRevisionXMLTag':When parsing a XML tag in a page revision. Return false to stop further processing of the tag $reader:XMLReader object $pageInfo:Array of page information $revisionInfo:Array of revision information 'ImportHandleToplevelXMLTag':When parsing a top level XML tag. Return false to stop further processing of the tag $reader:XMLReader object 'ImportHandleUploadXMLTag':When parsing a XML tag in a file upload. Return false to stop further processing of the tag $reader:XMLReader object $revisionInfo:Array of information 'ImportLogInterwikiLink':Hook to change the interwiki link used in log entries and edit summaries for transwiki imports. & $fullInterwikiPrefix:Interwiki prefix, may contain colons. & $pageTitle:String that contains page title. 'ImportSources':Called when reading from the $wgImportSources configuration variable. Can be used to lazy-load the import sources list. & $importSources:The value of $wgImportSources. Modify as necessary. See the comment in DefaultSettings.php for the detail of how to structure this array. 'InfoAction':When building information to display on the action=info page. $context:IContextSource object & $pageInfo:Array of information 'InitializeArticleMaybeRedirect':MediaWiki check to see if title is a redirect. & $title:Title object for the current page & $request:WebRequest & $ignoreRedirect:boolean to skip redirect check & $target:Title/string of redirect target & $article:Article object 'InternalParseBeforeLinks':during Parser 's internalParse method before links but after nowiki/noinclude/includeonly/onlyinclude and other processings. & $parser:Parser object & $text:string containing partially parsed text & $stripState:Parser 's internal StripState object 'InternalParseBeforeSanitize':during Parser 's internalParse method just before the parser removes unwanted/dangerous HTML tags and after nowiki/noinclude/includeonly/onlyinclude and other processings. Ideal for syntax-extensions after template/parser function execution which respect nowiki and HTML-comments. & $parser:Parser object & $text:string containing partially parsed text & $stripState:Parser 's internal StripState object 'InterwikiLoadPrefix':When resolving if a given prefix is an interwiki or not. Return true without providing an interwiki to continue interwiki search. $prefix:interwiki prefix we are looking for. & $iwData:output array describing the interwiki with keys iw_url, iw_local, iw_trans and optionally iw_api and iw_wikiid. 'InvalidateEmailComplete':Called after a user 's email has been invalidated successfully. $user:user(object) whose email is being invalidated 'IRCLineURL':When constructing the URL to use in an IRC notification. Callee may modify $url and $query, URL will be constructed as $url . $query & $url:URL to index.php & $query:Query string $rc:RecentChange object that triggered url generation 'IsFileCacheable':Override the result of Article::isFileCacheable()(if true) & $article:article(object) being checked 'IsTrustedProxy':Override the result of IP::isTrustedProxy() & $ip:IP being check & $result:Change this value to override the result of IP::isTrustedProxy() 'IsUploadAllowedFromUrl':Override the result of UploadFromUrl::isAllowedUrl() $url:URL used to upload from & $allowed:Boolean indicating if uploading is allowed for given URL 'isValidEmailAddr':Override the result of Sanitizer::validateEmail(), for instance to return false if the domain name doesn 't match your organization. $addr:The e-mail address entered by the user & $result:Set this and return false to override the internal checks 'isValidPassword':Override the result of User::isValidPassword() $password:The password entered by the user & $result:Set this and return false to override the internal checks $user:User the password is being validated for 'Language::getMessagesFileName':$code:The language code or the language we 're looking for a messages file for & $file:The messages file path, you can override this to change the location. 'LanguageGetMagic':DEPRECATED! Use $magicWords in a file listed in $wgExtensionMessagesFiles instead. Use this to define synonyms of magic words depending of the language & $magicExtensions:associative array of magic words synonyms $lang:language code(string) 'LanguageGetNamespaces':Provide custom ordering for namespaces or remove namespaces. Do not use this hook to add namespaces. Use CanonicalNamespaces for that. & $namespaces:Array of namespaces indexed by their numbers 'LanguageGetSpecialPageAliases':DEPRECATED! Use $specialPageAliases in a file listed in $wgExtensionMessagesFiles instead. Use to define aliases of special pages names depending of the language & $specialPageAliases:associative array of magic words synonyms $lang:language code(string) 'LanguageGetTranslatedLanguageNames':Provide translated language names. & $names:array of language code=> language name $code:language of the preferred translations 'LanguageLinks':Manipulate a page 's language links. This is called in various places to allow extensions to define the effective language links for a page. $title:The page 's Title. & $links:Array with elements of the form "language:title" in the order that they will be output. & $linkFlags:Associative array mapping prefixed links to arrays of flags. Currently unused, but planned to provide support for marking individual language links in the UI, e.g. for featured articles. 'LanguageSelector':Hook to change the language selector available on a page. $out:The output page. $cssClassName:CSS class name of the language selector. 'LinkBegin':DEPRECATED! Use HtmlPageLinkRendererBegin instead. Used when generating internal and interwiki links in Linker::link(), before processing starts. Return false to skip default processing and return $ret. See documentation for Linker::link() for details on the expected meanings of parameters. $skin:the Skin object $target:the Title that the link is pointing to & $html:the contents that the< a > tag should have(raw HTML) $result
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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
This document describes the state of Postgres support in and is fairly well maintained The main code is very well while extensions are very hit and miss it is probably the most supported database after MySQL Much of the work in making MediaWiki database agnostic came about through the work of creating Postgres as and are nearing end of but without copying over all the usage comments General notes on the but these can almost always be programmed around *Although Postgres has a true BOOLEAN boolean columns are always mapped to as the code does not always treat the column as a and VARBINARY columns should simply be TEXT The only exception is when VARBINARY is used to store true binary such as the math_inputhash column