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Diffstat (limited to 'www/wiki/includes/db/DatabaseOracle.php')
-rw-r--r-- | www/wiki/includes/db/DatabaseOracle.php | 1382 |
1 files changed, 1382 insertions, 0 deletions
diff --git a/www/wiki/includes/db/DatabaseOracle.php b/www/wiki/includes/db/DatabaseOracle.php new file mode 100644 index 00000000..3362f0f9 --- /dev/null +++ b/www/wiki/includes/db/DatabaseOracle.php @@ -0,0 +1,1382 @@ +<?php +/** + * This is the Oracle database abstraction layer. + * + * 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 + * + * @file + * @ingroup Database + */ + +use Wikimedia\Rdbms\Database; +use Wikimedia\Rdbms\Blob; +use Wikimedia\Rdbms\ResultWrapper; +use Wikimedia\Rdbms\DBConnectionError; +use Wikimedia\Rdbms\DBUnexpectedError; + +/** + * @ingroup Database + */ +class DatabaseOracle extends Database { + /** @var resource */ + protected $mLastResult = null; + + /** @var int The number of rows affected as an integer */ + protected $mAffectedRows; + + /** @var bool */ + private $ignoreDupValOnIndex = false; + + /** @var bool|array */ + private $sequenceData = null; + + /** @var string Character set for Oracle database */ + private $defaultCharset = 'AL32UTF8'; + + /** @var array */ + private $mFieldInfoCache = []; + + function __construct( array $p ) { + global $wgDBprefix; + + if ( $p['tablePrefix'] == 'get from global' ) { + $p['tablePrefix'] = $wgDBprefix; + } + $p['tablePrefix'] = strtoupper( $p['tablePrefix'] ); + parent::__construct( $p ); + Hooks::run( 'DatabaseOraclePostInit', [ $this ] ); + } + + function __destruct() { + if ( $this->opened ) { + Wikimedia\suppressWarnings(); + $this->close(); + Wikimedia\restoreWarnings(); + } + } + + function getType() { + return 'oracle'; + } + + function implicitGroupby() { + return false; + } + + function implicitOrderby() { + return false; + } + + /** + * Usually aborts on failure + * @param string $server + * @param string $user + * @param string $password + * @param string $dbName + * @throws DBConnectionError + * @return resource|null + */ + function open( $server, $user, $password, $dbName ) { + global $wgDBOracleDRCP; + if ( !function_exists( 'oci_connect' ) ) { + throw new DBConnectionError( + $this, + "Oracle functions missing, have you compiled PHP with the --with-oci8 option?\n " . + "(Note: if you recently installed PHP, you may need to restart your webserver\n " . + "and database)\n" ); + } + + $this->close(); + $this->user = $user; + $this->password = $password; + // changed internal variables functions + // mServer now holds the TNS endpoint + // mDBname is schema name if different from username + if ( !$server ) { + // backward compatibillity (server used to be null and TNS was supplied in dbname) + $this->server = $dbName; + $this->dbName = $user; + } else { + $this->server = $server; + if ( !$dbName ) { + $this->dbName = $user; + } else { + $this->dbName = $dbName; + } + } + + if ( !strlen( $user ) ) { # e.g. the class is being loaded + return null; + } + + if ( $wgDBOracleDRCP ) { + $this->setFlag( DBO_PERSISTENT ); + } + + $session_mode = $this->flags & DBO_SYSDBA ? OCI_SYSDBA : OCI_DEFAULT; + + Wikimedia\suppressWarnings(); + if ( $this->flags & DBO_PERSISTENT ) { + $this->conn = oci_pconnect( + $this->user, + $this->password, + $this->server, + $this->defaultCharset, + $session_mode + ); + } elseif ( $this->flags & DBO_DEFAULT ) { + $this->conn = oci_new_connect( + $this->user, + $this->password, + $this->server, + $this->defaultCharset, + $session_mode + ); + } else { + $this->conn = oci_connect( + $this->user, + $this->password, + $this->server, + $this->defaultCharset, + $session_mode + ); + } + Wikimedia\restoreWarnings(); + + if ( $this->user != $this->dbName ) { + // change current schema in session + $this->selectDB( $this->dbName ); + } + + if ( !$this->conn ) { + throw new DBConnectionError( $this, $this->lastError() ); + } + + $this->opened = true; + + # removed putenv calls because they interfere with the system globaly + $this->doQuery( 'ALTER SESSION SET NLS_TIMESTAMP_FORMAT=\'DD-MM-YYYY HH24:MI:SS.FF6\'' ); + $this->doQuery( 'ALTER SESSION SET NLS_TIMESTAMP_TZ_FORMAT=\'DD-MM-YYYY HH24:MI:SS.FF6\'' ); + $this->doQuery( 'ALTER SESSION SET NLS_NUMERIC_CHARACTERS=\'.,\'' ); + + return $this->conn; + } + + /** + * Closes a database connection, if it is open + * Returns success, true if already closed + * @return bool + */ + protected function closeConnection() { + return oci_close( $this->conn ); + } + + function execFlags() { + return $this->trxLevel ? OCI_NO_AUTO_COMMIT : OCI_COMMIT_ON_SUCCESS; + } + + protected function doQuery( $sql ) { + wfDebug( "SQL: [$sql]\n" ); + if ( !StringUtils::isUtf8( $sql ) ) { + throw new InvalidArgumentException( "SQL encoding is invalid\n$sql" ); + } + + // handle some oracle specifics + // remove AS column/table/subquery namings + if ( !$this->getFlag( DBO_DDLMODE ) ) { + $sql = preg_replace( '/ as /i', ' ', $sql ); + } + + // Oracle has issues with UNION clause if the statement includes LOB fields + // So we do a UNION ALL and then filter the results array with array_unique + $union_unique = ( preg_match( '/\/\* UNION_UNIQUE \*\/ /', $sql ) != 0 ); + // EXPLAIN syntax in Oracle is EXPLAIN PLAN FOR and it return nothing + // you have to select data from plan table after explain + $explain_id = MWTimestamp::getLocalInstance()->format( 'dmYHis' ); + + $sql = preg_replace( + '/^EXPLAIN /', + 'EXPLAIN PLAN SET STATEMENT_ID = \'' . $explain_id . '\' FOR', + $sql, + 1, + $explain_count + ); + + Wikimedia\suppressWarnings(); + + $this->mLastResult = $stmt = oci_parse( $this->conn, $sql ); + if ( $stmt === false ) { + $e = oci_error( $this->conn ); + $this->reportQueryError( $e['message'], $e['code'], $sql, __METHOD__ ); + + return false; + } + + if ( !oci_execute( $stmt, $this->execFlags() ) ) { + $e = oci_error( $stmt ); + if ( !$this->ignoreDupValOnIndex || $e['code'] != '1' ) { + $this->reportQueryError( $e['message'], $e['code'], $sql, __METHOD__ ); + + return false; + } + } + + Wikimedia\restoreWarnings(); + + if ( $explain_count > 0 ) { + return $this->doQuery( 'SELECT id, cardinality "ROWS" FROM plan_table ' . + 'WHERE statement_id = \'' . $explain_id . '\'' ); + } elseif ( oci_statement_type( $stmt ) == 'SELECT' ) { + return new ORAResult( $this, $stmt, $union_unique ); + } else { + $this->mAffectedRows = oci_num_rows( $stmt ); + + return true; + } + } + + function queryIgnore( $sql, $fname = '' ) { + return $this->query( $sql, $fname, true ); + } + + /** + * Frees resources associated with the LOB descriptor + * @param ResultWrapper|ORAResult $res + */ + function freeResult( $res ) { + if ( $res instanceof ResultWrapper ) { + $res = $res->result; + } + + $res->free(); + } + + /** + * @param ResultWrapper|ORAResult $res + * @return mixed + */ + function fetchObject( $res ) { + if ( $res instanceof ResultWrapper ) { + $res = $res->result; + } + + return $res->fetchObject(); + } + + /** + * @param ResultWrapper|ORAResult $res + * @return mixed + */ + function fetchRow( $res ) { + if ( $res instanceof ResultWrapper ) { + $res = $res->result; + } + + return $res->fetchRow(); + } + + /** + * @param ResultWrapper|ORAResult $res + * @return int + */ + function numRows( $res ) { + if ( $res instanceof ResultWrapper ) { + $res = $res->result; + } + + return $res->numRows(); + } + + /** + * @param ResultWrapper|ORAResult $res + * @return int + */ + function numFields( $res ) { + if ( $res instanceof ResultWrapper ) { + $res = $res->result; + } + + return $res->numFields(); + } + + function fieldName( $stmt, $n ) { + return oci_field_name( $stmt, $n ); + } + + function insertId() { + $res = $this->query( "SELECT lastval_pkg.getLastval FROM dual" ); + $row = $this->fetchRow( $res ); + return is_null( $row[0] ) ? null : (int)$row[0]; + } + + /** + * @param mixed $res + * @param int $row + */ + function dataSeek( $res, $row ) { + if ( $res instanceof ORAResult ) { + $res->seek( $row ); + } else { + $res->result->seek( $row ); + } + } + + function lastError() { + if ( $this->conn === false ) { + $e = oci_error(); + } else { + $e = oci_error( $this->conn ); + } + + return $e['message']; + } + + function lastErrno() { + if ( $this->conn === false ) { + $e = oci_error(); + } else { + $e = oci_error( $this->conn ); + } + + return $e['code']; + } + + protected function fetchAffectedRowCount() { + return $this->mAffectedRows; + } + + /** + * Returns information about an index + * If errors are explicitly ignored, returns NULL on failure + * @param string $table + * @param string $index + * @param string $fname + * @return bool + */ + function indexInfo( $table, $index, $fname = __METHOD__ ) { + return false; + } + + function indexUnique( $table, $index, $fname = __METHOD__ ) { + return false; + } + + function insert( $table, $a, $fname = __METHOD__, $options = [] ) { + if ( !count( $a ) ) { + return true; + } + + if ( !is_array( $options ) ) { + $options = [ $options ]; + } + + if ( in_array( 'IGNORE', $options ) ) { + $this->ignoreDupValOnIndex = true; + } + + if ( !is_array( reset( $a ) ) ) { + $a = [ $a ]; + } + + foreach ( $a as &$row ) { + $this->insertOneRow( $table, $row, $fname ); + } + $retVal = true; + + if ( in_array( 'IGNORE', $options ) ) { + $this->ignoreDupValOnIndex = false; + } + + return $retVal; + } + + private function fieldBindStatement( $table, $col, &$val, $includeCol = false ) { + $col_info = $this->fieldInfoMulti( $table, $col ); + $col_type = $col_info != false ? $col_info->type() : 'CONSTANT'; + + $bind = ''; + if ( is_numeric( $col ) ) { + $bind = $val; + $val = null; + + return $bind; + } elseif ( $includeCol ) { + $bind = "$col = "; + } + + if ( $val == '' && $val !== 0 && $col_type != 'BLOB' && $col_type != 'CLOB' ) { + $val = null; + } + + if ( $val === 'NULL' ) { + $val = null; + } + + if ( $val === null ) { + if ( $col_info != false && $col_info->isNullable() == 0 && $col_info->defaultValue() != null ) { + $bind .= 'DEFAULT'; + } else { + $bind .= 'NULL'; + } + } else { + $bind .= ':' . $col; + } + + return $bind; + } + + /** + * @param string $table + * @param array $row + * @param string $fname + * @return bool + * @throws DBUnexpectedError + */ + private function insertOneRow( $table, $row, $fname ) { + global $wgContLang; + + $table = $this->tableName( $table ); + // "INSERT INTO tables (a, b, c)" + $sql = "INSERT INTO " . $table . " (" . implode( ',', array_keys( $row ) ) . ')'; + $sql .= " VALUES ("; + + // for each value, append ":key" + $first = true; + foreach ( $row as $col => &$val ) { + if ( !$first ) { + $sql .= ', '; + } else { + $first = false; + } + if ( $this->isQuotedIdentifier( $val ) ) { + $sql .= $this->removeIdentifierQuotes( $val ); + unset( $row[$col] ); + } else { + $sql .= $this->fieldBindStatement( $table, $col, $val ); + } + } + $sql .= ')'; + + $this->mLastResult = $stmt = oci_parse( $this->conn, $sql ); + if ( $stmt === false ) { + $e = oci_error( $this->conn ); + $this->reportQueryError( $e['message'], $e['code'], $sql, __METHOD__ ); + + return false; + } + foreach ( $row as $col => &$val ) { + $col_info = $this->fieldInfoMulti( $table, $col ); + $col_type = $col_info != false ? $col_info->type() : 'CONSTANT'; + + if ( $val === null ) { + // do nothing ... null was inserted in statement creation + } elseif ( $col_type != 'BLOB' && $col_type != 'CLOB' ) { + if ( is_object( $val ) ) { + $val = $val->fetch(); + } + + // backward compatibility + if ( preg_match( '/^timestamp.*/i', $col_type ) == 1 && strtolower( $val ) == 'infinity' ) { + $val = $this->getInfinity(); + } + + $val = ( $wgContLang != null ) ? $wgContLang->checkTitleEncoding( $val ) : $val; + if ( oci_bind_by_name( $stmt, ":$col", $val, -1, SQLT_CHR ) === false ) { + $e = oci_error( $stmt ); + $this->reportQueryError( $e['message'], $e['code'], $sql, __METHOD__ ); + + return false; + } + } else { + /** @var OCI_Lob[] $lob */ + $lob[$col] = oci_new_descriptor( $this->conn, OCI_D_LOB ); + if ( $lob[$col] === false ) { + $e = oci_error( $stmt ); + throw new DBUnexpectedError( $this, "Cannot create LOB descriptor: " . $e['message'] ); + } + + if ( is_object( $val ) ) { + $val = $val->fetch(); + } + + if ( $col_type == 'BLOB' ) { + $lob[$col]->writeTemporary( $val, OCI_TEMP_BLOB ); + oci_bind_by_name( $stmt, ":$col", $lob[$col], -1, OCI_B_BLOB ); + } else { + $lob[$col]->writeTemporary( $val, OCI_TEMP_CLOB ); + oci_bind_by_name( $stmt, ":$col", $lob[$col], -1, OCI_B_CLOB ); + } + } + } + + Wikimedia\suppressWarnings(); + + if ( oci_execute( $stmt, $this->execFlags() ) === false ) { + $e = oci_error( $stmt ); + if ( !$this->ignoreDupValOnIndex || $e['code'] != '1' ) { + $this->reportQueryError( $e['message'], $e['code'], $sql, __METHOD__ ); + + return false; + } else { + $this->mAffectedRows = oci_num_rows( $stmt ); + } + } else { + $this->mAffectedRows = oci_num_rows( $stmt ); + } + + Wikimedia\restoreWarnings(); + + if ( isset( $lob ) ) { + foreach ( $lob as $lob_v ) { + $lob_v->free(); + } + } + + if ( !$this->trxLevel ) { + oci_commit( $this->conn ); + } + + return oci_free_statement( $stmt ); + } + + function nativeInsertSelect( $destTable, $srcTable, $varMap, $conds, $fname = __METHOD__, + $insertOptions = [], $selectOptions = [], $selectJoinConds = [] + ) { + $destTable = $this->tableName( $destTable ); + + $sequenceData = $this->getSequenceData( $destTable ); + if ( $sequenceData !== false && + !isset( $varMap[$sequenceData['column']] ) + ) { + $varMap[$sequenceData['column']] = 'GET_SEQUENCE_VALUE(\'' . $sequenceData['sequence'] . '\')'; + } + + // count-alias subselect fields to avoid abigious definition errors + $i = 0; + foreach ( $varMap as &$val ) { + $val = $val . ' field' . ( $i++ ); + } + + $selectSql = $this->selectSQLText( + $srcTable, + array_values( $varMap ), + $conds, + $fname, + $selectOptions, + $selectJoinConds + ); + + $sql = "INSERT INTO $destTable (" . implode( ',', array_keys( $varMap ) ) . ') ' . $selectSql; + + if ( in_array( 'IGNORE', $insertOptions ) ) { + $this->ignoreDupValOnIndex = true; + } + + $retval = $this->query( $sql, $fname ); + + if ( in_array( 'IGNORE', $insertOptions ) ) { + $this->ignoreDupValOnIndex = false; + } + + return $retval; + } + + public function upsert( $table, array $rows, array $uniqueIndexes, array $set, + $fname = __METHOD__ + ) { + if ( !count( $rows ) ) { + return true; // nothing to do + } + + if ( !is_array( reset( $rows ) ) ) { + $rows = [ $rows ]; + } + + $sequenceData = $this->getSequenceData( $table ); + if ( $sequenceData !== false ) { + // add sequence column to each list of columns, when not set + foreach ( $rows as &$row ) { + if ( !isset( $row[$sequenceData['column']] ) ) { + $row[$sequenceData['column']] = + $this->addIdentifierQuotes( 'GET_SEQUENCE_VALUE(\'' . + $sequenceData['sequence'] . '\')' ); + } + } + } + + return parent::upsert( $table, $rows, $uniqueIndexes, $set, $fname ); + } + + function tableName( $name, $format = 'quoted' ) { + /* + Replace reserved words with better ones + Using uppercase because that's the only way Oracle can handle + quoted tablenames + */ + switch ( $name ) { + case 'user': + $name = 'MWUSER'; + break; + case 'text': + $name = 'PAGECONTENT'; + break; + } + + return strtoupper( parent::tableName( $name, $format ) ); + } + + function tableNameInternal( $name ) { + $name = $this->tableName( $name ); + + return preg_replace( '/.*\.(.*)/', '$1', $name ); + } + + /** + * Return sequence_name if table has a sequence + * + * @param string $table + * @return bool + */ + private function getSequenceData( $table ) { + if ( $this->sequenceData == null ) { + $result = $this->doQuery( "SELECT lower(asq.sequence_name), + lower(atc.table_name), + lower(atc.column_name) + FROM all_sequences asq, all_tab_columns atc + WHERE decode( + atc.table_name, + '{$this->tablePrefix}MWUSER', + '{$this->tablePrefix}USER', + atc.table_name + ) || '_' || + atc.column_name || '_SEQ' = '{$this->tablePrefix}' || asq.sequence_name + AND asq.sequence_owner = upper('{$this->dbName}') + AND atc.owner = upper('{$this->dbName}')" ); + + while ( ( $row = $result->fetchRow() ) !== false ) { + $this->sequenceData[$row[1]] = [ + 'sequence' => $row[0], + 'column' => $row[2] + ]; + } + } + $table = strtolower( $this->removeIdentifierQuotes( $this->tableName( $table ) ) ); + + return ( isset( $this->sequenceData[$table] ) ) ? $this->sequenceData[$table] : false; + } + + /** + * Returns the size of a text field, or -1 for "unlimited" + * + * @param string $table + * @param string $field + * @return mixed + */ + function textFieldSize( $table, $field ) { + $fieldInfoData = $this->fieldInfo( $table, $field ); + + return $fieldInfoData->maxLength(); + } + + function limitResult( $sql, $limit, $offset = false ) { + if ( $offset === false ) { + $offset = 0; + } + + return "SELECT * FROM ($sql) WHERE rownum >= (1 + $offset) AND rownum < (1 + $limit + $offset)"; + } + + function encodeBlob( $b ) { + return new Blob( $b ); + } + + function decodeBlob( $b ) { + if ( $b instanceof Blob ) { + $b = $b->fetch(); + } + + return $b; + } + + function unionQueries( $sqls, $all ) { + $glue = ' UNION ALL '; + + return 'SELECT * ' . ( $all ? '' : '/* UNION_UNIQUE */ ' ) . + 'FROM (' . implode( $glue, $sqls ) . ')'; + } + + function wasDeadlock() { + return $this->lastErrno() == 'OCI-00060'; + } + + function duplicateTableStructure( $oldName, $newName, $temporary = false, + $fname = __METHOD__ + ) { + $temporary = $temporary ? 'TRUE' : 'FALSE'; + + $newName = strtoupper( $newName ); + $oldName = strtoupper( $oldName ); + + $tabName = substr( $newName, strlen( $this->tablePrefix ) ); + $oldPrefix = substr( $oldName, 0, strlen( $oldName ) - strlen( $tabName ) ); + $newPrefix = strtoupper( $this->tablePrefix ); + + return $this->doQuery( "BEGIN DUPLICATE_TABLE( '$tabName', " . + "'$oldPrefix', '$newPrefix', $temporary ); END;" ); + } + + function listTables( $prefix = null, $fname = __METHOD__ ) { + $listWhere = ''; + if ( !empty( $prefix ) ) { + $listWhere = ' AND table_name LIKE \'' . strtoupper( $prefix ) . '%\''; + } + + $owner = strtoupper( $this->dbName ); + $result = $this->doQuery( "SELECT table_name FROM all_tables " . + "WHERE owner='$owner' AND table_name NOT LIKE '%!_IDX\$_' ESCAPE '!' $listWhere" ); + + // dirty code ... i know + $endArray = []; + $endArray[] = strtoupper( $prefix . 'MWUSER' ); + $endArray[] = strtoupper( $prefix . 'PAGE' ); + $endArray[] = strtoupper( $prefix . 'IMAGE' ); + $fixedOrderTabs = $endArray; + while ( ( $row = $result->fetchRow() ) !== false ) { + if ( !in_array( $row['table_name'], $fixedOrderTabs ) ) { + $endArray[] = $row['table_name']; + } + } + + return $endArray; + } + + public function dropTable( $tableName, $fName = __METHOD__ ) { + $tableName = $this->tableName( $tableName ); + if ( !$this->tableExists( $tableName ) ) { + return false; + } + + return $this->doQuery( "DROP TABLE $tableName CASCADE CONSTRAINTS PURGE" ); + } + + function timestamp( $ts = 0 ) { + return wfTimestamp( TS_ORACLE, $ts ); + } + + /** + * Return aggregated value function call + * + * @param array $valuedata + * @param string $valuename + * @return mixed + */ + public function aggregateValue( $valuedata, $valuename = 'value' ) { + return $valuedata; + } + + /** + * @return string Wikitext of a link to the server software's web site + */ + public function getSoftwareLink() { + return '[{{int:version-db-oracle-url}} Oracle]'; + } + + /** + * @return string Version information from the database + */ + function getServerVersion() { + // better version number, fallback on driver + $rset = $this->doQuery( + 'SELECT version FROM product_component_version ' . + 'WHERE UPPER(product) LIKE \'ORACLE DATABASE%\'' + ); + $row = $rset->fetchRow(); + if ( !$row ) { + return oci_server_version( $this->conn ); + } + + return $row['version']; + } + + /** + * Query whether a given index exists + * @param string $table + * @param string $index + * @param string $fname + * @return bool + */ + function indexExists( $table, $index, $fname = __METHOD__ ) { + $table = $this->tableName( $table ); + $table = strtoupper( $this->removeIdentifierQuotes( $table ) ); + $index = strtoupper( $index ); + $owner = strtoupper( $this->dbName ); + $sql = "SELECT 1 FROM all_indexes WHERE owner='$owner' AND index_name='{$table}_{$index}'"; + $res = $this->doQuery( $sql ); + if ( $res ) { + $count = $res->numRows(); + $res->free(); + } else { + $count = 0; + } + + return $count != 0; + } + + /** + * Query whether a given table exists (in the given schema, or the default mw one if not given) + * @param string $table + * @param string $fname + * @return bool + */ + function tableExists( $table, $fname = __METHOD__ ) { + $table = $this->tableName( $table ); + $table = $this->addQuotes( strtoupper( $this->removeIdentifierQuotes( $table ) ) ); + $owner = $this->addQuotes( strtoupper( $this->dbName ) ); + $sql = "SELECT 1 FROM all_tables WHERE owner=$owner AND table_name=$table"; + $res = $this->doQuery( $sql ); + if ( $res && $res->numRows() > 0 ) { + $exists = true; + } else { + $exists = false; + } + + $res->free(); + + return $exists; + } + + /** + * Function translates mysql_fetch_field() functionality on ORACLE. + * Caching is present for reducing query time. + * For internal calls. Use fieldInfo for normal usage. + * Returns false if the field doesn't exist + * + * @param array|string $table + * @param string $field + * @return ORAField|ORAResult|false + */ + private function fieldInfoMulti( $table, $field ) { + $field = strtoupper( $field ); + if ( is_array( $table ) ) { + $table = array_map( [ $this, 'tableNameInternal' ], $table ); + $tableWhere = 'IN ('; + foreach ( $table as &$singleTable ) { + $singleTable = $this->removeIdentifierQuotes( $singleTable ); + if ( isset( $this->mFieldInfoCache["$singleTable.$field"] ) ) { + return $this->mFieldInfoCache["$singleTable.$field"]; + } + $tableWhere .= '\'' . $singleTable . '\','; + } + $tableWhere = rtrim( $tableWhere, ',' ) . ')'; + } else { + $table = $this->removeIdentifierQuotes( $this->tableNameInternal( $table ) ); + if ( isset( $this->mFieldInfoCache["$table.$field"] ) ) { + return $this->mFieldInfoCache["$table.$field"]; + } + $tableWhere = '= \'' . $table . '\''; + } + + $fieldInfoStmt = oci_parse( + $this->conn, + 'SELECT * FROM wiki_field_info_full WHERE table_name ' . + $tableWhere . ' and column_name = \'' . $field . '\'' + ); + if ( oci_execute( $fieldInfoStmt, $this->execFlags() ) === false ) { + $e = oci_error( $fieldInfoStmt ); + $this->reportQueryError( $e['message'], $e['code'], 'fieldInfo QUERY', __METHOD__ ); + + return false; + } + $res = new ORAResult( $this, $fieldInfoStmt ); + if ( $res->numRows() == 0 ) { + if ( is_array( $table ) ) { + foreach ( $table as &$singleTable ) { + $this->mFieldInfoCache["$singleTable.$field"] = false; + } + } else { + $this->mFieldInfoCache["$table.$field"] = false; + } + $fieldInfoTemp = null; + } else { + $fieldInfoTemp = new ORAField( $res->fetchRow() ); + $table = $fieldInfoTemp->tableName(); + $this->mFieldInfoCache["$table.$field"] = $fieldInfoTemp; + } + $res->free(); + + return $fieldInfoTemp; + } + + /** + * @throws DBUnexpectedError + * @param string $table + * @param string $field + * @return ORAField + */ + function fieldInfo( $table, $field ) { + if ( is_array( $table ) ) { + throw new DBUnexpectedError( $this, 'DatabaseOracle::fieldInfo called with table array!' ); + } + + return $this->fieldInfoMulti( $table, $field ); + } + + protected function doBegin( $fname = __METHOD__ ) { + $this->trxLevel = 1; + $this->doQuery( 'SET CONSTRAINTS ALL DEFERRED' ); + } + + protected function doCommit( $fname = __METHOD__ ) { + if ( $this->trxLevel ) { + $ret = oci_commit( $this->conn ); + if ( !$ret ) { + throw new DBUnexpectedError( $this, $this->lastError() ); + } + $this->trxLevel = 0; + $this->doQuery( 'SET CONSTRAINTS ALL IMMEDIATE' ); + } + } + + protected function doRollback( $fname = __METHOD__ ) { + if ( $this->trxLevel ) { + oci_rollback( $this->conn ); + $this->trxLevel = 0; + $this->doQuery( 'SET CONSTRAINTS ALL IMMEDIATE' ); + } + } + + function sourceStream( + $fp, + callable $lineCallback = null, + callable $resultCallback = null, + $fname = __METHOD__, callable $inputCallback = null + ) { + $cmd = ''; + $done = false; + $dollarquote = false; + + $replacements = []; + // Defines must comply with ^define\s*([^\s=]*)\s*=\s?'\{\$([^\}]*)\}'; + while ( !feof( $fp ) ) { + if ( $lineCallback ) { + call_user_func( $lineCallback ); + } + $line = trim( fgets( $fp, 1024 ) ); + $sl = strlen( $line ) - 1; + + if ( $sl < 0 ) { + continue; + } + if ( '-' == $line[0] && '-' == $line[1] ) { + continue; + } + + // Allow dollar quoting for function declarations + if ( substr( $line, 0, 8 ) == '/*$mw$*/' ) { + if ( $dollarquote ) { + $dollarquote = false; + $line = str_replace( '/*$mw$*/', '', $line ); // remove dollarquotes + $done = true; + } else { + $dollarquote = true; + } + } elseif ( !$dollarquote ) { + if ( ';' == $line[$sl] && ( $sl < 2 || ';' != $line[$sl - 1] ) ) { + $done = true; + $line = substr( $line, 0, $sl ); + } + } + + if ( $cmd != '' ) { + $cmd .= ' '; + } + $cmd .= "$line\n"; + + if ( $done ) { + $cmd = str_replace( ';;', ";", $cmd ); + if ( strtolower( substr( $cmd, 0, 6 ) ) == 'define' ) { + if ( preg_match( '/^define\s*([^\s=]*)\s*=\s*\'\{\$([^\}]*)\}\'/', $cmd, $defines ) ) { + $replacements[$defines[2]] = $defines[1]; + } + } else { + foreach ( $replacements as $mwVar => $scVar ) { + $cmd = str_replace( '&' . $scVar . '.', '`{$' . $mwVar . '}`', $cmd ); + } + + $cmd = $this->replaceVars( $cmd ); + if ( $inputCallback ) { + call_user_func( $inputCallback, $cmd ); + } + $res = $this->doQuery( $cmd ); + if ( $resultCallback ) { + call_user_func( $resultCallback, $res, $this ); + } + + if ( false === $res ) { + $err = $this->lastError(); + + return "Query \"{$cmd}\" failed with error code \"$err\".\n"; + } + } + + $cmd = ''; + $done = false; + } + } + + return true; + } + + function selectDB( $db ) { + $this->dbName = $db; + if ( $db == null || $db == $this->user ) { + return true; + } + $sql = 'ALTER SESSION SET CURRENT_SCHEMA=' . strtoupper( $db ); + $stmt = oci_parse( $this->conn, $sql ); + Wikimedia\suppressWarnings(); + $success = oci_execute( $stmt ); + Wikimedia\restoreWarnings(); + if ( !$success ) { + $e = oci_error( $stmt ); + if ( $e['code'] != '1435' ) { + $this->reportQueryError( $e['message'], $e['code'], $sql, __METHOD__ ); + } + + return false; + } + + return true; + } + + function strencode( $s ) { + return str_replace( "'", "''", $s ); + } + + function addQuotes( $s ) { + global $wgContLang; + if ( isset( $wgContLang->mLoaded ) && $wgContLang->mLoaded ) { + $s = $wgContLang->checkTitleEncoding( $s ); + } + + return "'" . $this->strencode( $s ) . "'"; + } + + public function addIdentifierQuotes( $s ) { + if ( !$this->getFlag( DBO_DDLMODE ) ) { + $s = '/*Q*/' . $s; + } + + return $s; + } + + public function removeIdentifierQuotes( $s ) { + return strpos( $s, '/*Q*/' ) === false ? $s : substr( $s, 5 ); + } + + public function isQuotedIdentifier( $s ) { + return strpos( $s, '/*Q*/' ) !== false; + } + + private function wrapFieldForWhere( $table, &$col, &$val ) { + global $wgContLang; + + $col_info = $this->fieldInfoMulti( $table, $col ); + $col_type = $col_info != false ? $col_info->type() : 'CONSTANT'; + if ( $col_type == 'CLOB' ) { + $col = 'TO_CHAR(' . $col . ')'; + $val = $wgContLang->checkTitleEncoding( $val ); + } elseif ( $col_type == 'VARCHAR2' ) { + $val = $wgContLang->checkTitleEncoding( $val ); + } + } + + private function wrapConditionsForWhere( $table, $conds, $parentCol = null ) { + $conds2 = []; + foreach ( $conds as $col => $val ) { + if ( is_array( $val ) ) { + $conds2[$col] = $this->wrapConditionsForWhere( $table, $val, $col ); + } else { + if ( is_numeric( $col ) && $parentCol != null ) { + $this->wrapFieldForWhere( $table, $parentCol, $val ); + } else { + $this->wrapFieldForWhere( $table, $col, $val ); + } + $conds2[$col] = $val; + } + } + + return $conds2; + } + + function selectRow( $table, $vars, $conds, $fname = __METHOD__, + $options = [], $join_conds = [] + ) { + if ( is_array( $conds ) ) { + $conds = $this->wrapConditionsForWhere( $table, $conds ); + } + + return parent::selectRow( $table, $vars, $conds, $fname, $options, $join_conds ); + } + + /** + * Returns an optional USE INDEX clause to go after the table, and a + * string to go at the end of the query + * + * @param array $options An associative array of options to be turned into + * an SQL query, valid keys are listed in the function. + * @return array + */ + function makeSelectOptions( $options ) { + $preLimitTail = $postLimitTail = ''; + $startOpts = ''; + + $noKeyOptions = []; + foreach ( $options as $key => $option ) { + if ( is_numeric( $key ) ) { + $noKeyOptions[$option] = true; + } + } + + $preLimitTail .= $this->makeGroupByWithHaving( $options ); + + $preLimitTail .= $this->makeOrderBy( $options ); + + if ( isset( $noKeyOptions['FOR UPDATE'] ) ) { + $postLimitTail .= ' FOR UPDATE'; + } + + if ( isset( $noKeyOptions['DISTINCT'] ) || isset( $noKeyOptions['DISTINCTROW'] ) ) { + $startOpts .= 'DISTINCT'; + } + + if ( isset( $options['USE INDEX'] ) && !is_array( $options['USE INDEX'] ) ) { + $useIndex = $this->useIndexClause( $options['USE INDEX'] ); + } else { + $useIndex = ''; + } + + if ( isset( $options['IGNORE INDEX'] ) && !is_array( $options['IGNORE INDEX'] ) ) { + $ignoreIndex = $this->ignoreIndexClause( $options['IGNORE INDEX'] ); + } else { + $ignoreIndex = ''; + } + + return [ $startOpts, $useIndex, $preLimitTail, $postLimitTail, $ignoreIndex ]; + } + + public function delete( $table, $conds, $fname = __METHOD__ ) { + global $wgActorTableSchemaMigrationStage; + + if ( is_array( $conds ) ) { + $conds = $this->wrapConditionsForWhere( $table, $conds ); + } + // a hack for deleting pages, users and images (which have non-nullable FKs) + // all deletions on these tables have transactions so final failure rollbacks these updates + // @todo: Normalize the schema to match MySQL, no special FKs and such + $table = $this->tableName( $table ); + if ( $table == $this->tableName( 'user' ) && $wgActorTableSchemaMigrationStage < MIGRATION_NEW ) { + $this->update( 'archive', [ 'ar_user' => 0 ], + [ 'ar_user' => $conds['user_id'] ], $fname ); + $this->update( 'ipblocks', [ 'ipb_user' => 0 ], + [ 'ipb_user' => $conds['user_id'] ], $fname ); + $this->update( 'image', [ 'img_user' => 0 ], + [ 'img_user' => $conds['user_id'] ], $fname ); + $this->update( 'oldimage', [ 'oi_user' => 0 ], + [ 'oi_user' => $conds['user_id'] ], $fname ); + $this->update( 'filearchive', [ 'fa_deleted_user' => 0 ], + [ 'fa_deleted_user' => $conds['user_id'] ], $fname ); + $this->update( 'filearchive', [ 'fa_user' => 0 ], + [ 'fa_user' => $conds['user_id'] ], $fname ); + $this->update( 'uploadstash', [ 'us_user' => 0 ], + [ 'us_user' => $conds['user_id'] ], $fname ); + $this->update( 'recentchanges', [ 'rc_user' => 0 ], + [ 'rc_user' => $conds['user_id'] ], $fname ); + $this->update( 'logging', [ 'log_user' => 0 ], + [ 'log_user' => $conds['user_id'] ], $fname ); + } elseif ( $table == $this->tableName( 'image' ) ) { + $this->update( 'oldimage', [ 'oi_name' => 0 ], + [ 'oi_name' => $conds['img_name'] ], $fname ); + } + + return parent::delete( $table, $conds, $fname ); + } + + /** + * @param string $table + * @param array $values + * @param array $conds + * @param string $fname + * @param array $options + * @return bool + * @throws DBUnexpectedError + */ + function update( $table, $values, $conds, $fname = __METHOD__, $options = [] ) { + global $wgContLang; + + $table = $this->tableName( $table ); + $opts = $this->makeUpdateOptions( $options ); + $sql = "UPDATE $opts $table SET "; + + $first = true; + foreach ( $values as $col => &$val ) { + $sqlSet = $this->fieldBindStatement( $table, $col, $val, true ); + + if ( !$first ) { + $sqlSet = ', ' . $sqlSet; + } else { + $first = false; + } + $sql .= $sqlSet; + } + + if ( $conds !== [] && $conds !== '*' ) { + $conds = $this->wrapConditionsForWhere( $table, $conds ); + $sql .= ' WHERE ' . $this->makeList( $conds, LIST_AND ); + } + + $this->mLastResult = $stmt = oci_parse( $this->conn, $sql ); + if ( $stmt === false ) { + $e = oci_error( $this->conn ); + $this->reportQueryError( $e['message'], $e['code'], $sql, __METHOD__ ); + + return false; + } + foreach ( $values as $col => &$val ) { + $col_info = $this->fieldInfoMulti( $table, $col ); + $col_type = $col_info != false ? $col_info->type() : 'CONSTANT'; + + if ( $val === null ) { + // do nothing ... null was inserted in statement creation + } elseif ( $col_type != 'BLOB' && $col_type != 'CLOB' ) { + if ( is_object( $val ) ) { + $val = $val->getData(); + } + + if ( preg_match( '/^timestamp.*/i', $col_type ) == 1 && strtolower( $val ) == 'infinity' ) { + $val = '31-12-2030 12:00:00.000000'; + } + + $val = ( $wgContLang != null ) ? $wgContLang->checkTitleEncoding( $val ) : $val; + if ( oci_bind_by_name( $stmt, ":$col", $val ) === false ) { + $e = oci_error( $stmt ); + $this->reportQueryError( $e['message'], $e['code'], $sql, __METHOD__ ); + + return false; + } + } else { + /** @var OCI_Lob[] $lob */ + $lob[$col] = oci_new_descriptor( $this->conn, OCI_D_LOB ); + if ( $lob[$col] === false ) { + $e = oci_error( $stmt ); + throw new DBUnexpectedError( $this, "Cannot create LOB descriptor: " . $e['message'] ); + } + + if ( is_object( $val ) ) { + $val = $val->getData(); + } + + if ( $col_type == 'BLOB' ) { + $lob[$col]->writeTemporary( $val ); + oci_bind_by_name( $stmt, ":$col", $lob[$col], -1, SQLT_BLOB ); + } else { + $lob[$col]->writeTemporary( $val ); + oci_bind_by_name( $stmt, ":$col", $lob[$col], -1, OCI_B_CLOB ); + } + } + } + + Wikimedia\suppressWarnings(); + + if ( oci_execute( $stmt, $this->execFlags() ) === false ) { + $e = oci_error( $stmt ); + if ( !$this->ignoreDupValOnIndex || $e['code'] != '1' ) { + $this->reportQueryError( $e['message'], $e['code'], $sql, __METHOD__ ); + + return false; + } else { + $this->mAffectedRows = oci_num_rows( $stmt ); + } + } else { + $this->mAffectedRows = oci_num_rows( $stmt ); + } + + Wikimedia\restoreWarnings(); + + if ( isset( $lob ) ) { + foreach ( $lob as $lob_v ) { + $lob_v->free(); + } + } + + if ( !$this->trxLevel ) { + oci_commit( $this->conn ); + } + + return oci_free_statement( $stmt ); + } + + function bitNot( $field ) { + // expecting bit-fields smaller than 4bytes + return 'BITNOT(' . $field . ')'; + } + + function bitAnd( $fieldLeft, $fieldRight ) { + return 'BITAND(' . $fieldLeft . ', ' . $fieldRight . ')'; + } + + function bitOr( $fieldLeft, $fieldRight ) { + return 'BITOR(' . $fieldLeft . ', ' . $fieldRight . ')'; + } + + function getDBname() { + return $this->dbName; + } + + function getServer() { + return $this->server; + } + + public function buildGroupConcatField( + $delim, $table, $field, $conds = '', $join_conds = [] + ) { + $fld = "LISTAGG($field," . $this->addQuotes( $delim ) . ") WITHIN GROUP (ORDER BY $field)"; + + return '(' . $this->selectSQLText( $table, $fld, $conds, null, [], $join_conds ) . ')'; + } + + public function buildSubstring( $input, $startPosition, $length = null ) { + $this->assertBuildSubstringParams( $startPosition, $length ); + $params = [ $input, $startPosition ]; + if ( $length !== null ) { + $params[] = $length; + } + return 'SUBSTR(' . implode( ',', $params ) . ')'; + } + + /** + * @param string $field Field or column to cast + * @return string + * @since 1.28 + */ + public function buildStringCast( $field ) { + return 'CAST ( ' . $field . ' AS VARCHAR2 )'; + } + + public function getInfinity() { + return '31-12-2030 12:00:00.000000'; + } +} |