692 lines
17 KiB
PHP
692 lines
17 KiB
PHP
<?php
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/**
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* Oracle.
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*
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* @package MediaWiki
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*/
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/**
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* Depends on database
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*/
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require_once( 'Database.php' );
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class OracleBlob extends DBObject {
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function isLOB() {
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return true;
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}
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function data() {
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return $this->mData;
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}
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};
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/**
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*
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* @package MediaWiki
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*/
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class DatabaseOracle extends Database {
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var $mInsertId = NULL;
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var $mLastResult = NULL;
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var $mFetchCache = array();
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var $mFetchID = array();
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var $mNcols = array();
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var $mFieldNames = array(), $mFieldTypes = array();
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var $mAffectedRows = array();
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var $mErr;
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function DatabaseOracle($server = false, $user = false, $password = false, $dbName = false,
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$failFunction = false, $flags = 0, $tablePrefix = 'get from global' )
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{
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Database::Database( $server, $user, $password, $dbName, $failFunction, $flags, $tablePrefix );
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}
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/* static */ function newFromParams( $server = false, $user = false, $password = false, $dbName = false,
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$failFunction = false, $flags = 0, $tablePrefix = 'get from global' )
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{
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return new DatabaseOracle( $server, $user, $password, $dbName, $failFunction, $flags, $tablePrefix );
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}
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/**
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* Usually aborts on failure
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* If the failFunction is set to a non-zero integer, returns success
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*/
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function open( $server, $user, $password, $dbName ) {
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if ( !function_exists( 'oci_connect' ) ) {
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throw new DBConnectionError( $this, "Oracle functions missing, have you compiled PHP with the --with-oci8 option?\n" );
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}
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$this->close();
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$this->mServer = $server;
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$this->mUser = $user;
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$this->mPassword = $password;
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$this->mDBname = $dbName;
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$success = false;
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$hstring="";
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$this->mConn = oci_new_connect($user, $password, $dbName, "AL32UTF8");
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if ( $this->mConn === false ) {
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wfDebug( "DB connection error\n" );
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wfDebug( "Server: $server, Database: $dbName, User: $user, Password: "
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. substr( $password, 0, 3 ) . "...\n" );
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wfDebug( $this->lastError()."\n" );
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} else {
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$this->mOpened = true;
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}
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return $this->mConn;
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}
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/**
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* Closes a database connection, if it is open
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* Returns success, true if already closed
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*/
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function close() {
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$this->mOpened = false;
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if ($this->mConn) {
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return oci_close($this->mConn);
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} else {
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return true;
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}
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}
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function parseStatement($sql) {
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$this->mErr = $this->mLastResult = false;
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if (($stmt = oci_parse($this->mConn, $sql)) === false) {
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$this->lastError();
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return $this->mLastResult = false;
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}
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$this->mAffectedRows[$stmt] = 0;
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return $this->mLastResult = $stmt;
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}
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function doQuery($sql) {
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if (($stmt = $this->parseStatement($sql)) === false)
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return false;
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return $this->executeStatement($stmt);
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}
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function executeStatement($stmt) {
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if (!oci_execute($stmt, OCI_DEFAULT)) {
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$this->lastError();
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oci_free_statement($stmt);
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return false;
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}
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$this->mAffectedRows[$stmt] = oci_num_rows($stmt);
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$this->mFetchCache[$stmt] = array();
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$this->mFetchID[$stmt] = 0;
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$this->mNcols[$stmt] = oci_num_fields($stmt);
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if ($this->mNcols[$stmt] == 0)
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return $this->mLastResult;
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for ($i = 1; $i <= $this->mNcols[$stmt]; $i++) {
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$this->mFieldNames[$stmt][$i] = oci_field_name($stmt, $i);
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$this->mFieldTypes[$stmt][$i] = oci_field_type($stmt, $i);
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}
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while (($o = oci_fetch_array($stmt)) !== false) {
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foreach ($o as $key => $value) {
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if (is_object($value)) {
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$o[$key] = $value->load();
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}
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}
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$this->mFetchCache[$stmt][] = $o;
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}
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return $this->mLastResult;
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}
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function queryIgnore( $sql, $fname = '' ) {
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return $this->query( $sql, $fname, true );
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}
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function freeResult( $res ) {
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if (!oci_free_statement($res)) {
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throw new DBUnexpectedError( $this, "Unable to free Oracle result\n" );
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}
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unset($this->mFetchID[$res]);
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unset($this->mFetchCache[$res]);
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unset($this->mNcols[$res]);
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unset($this->mFieldNames[$res]);
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unset($this->mFieldTypes[$res]);
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}
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function fetchAssoc($res) {
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if ($this->mFetchID[$res] >= count($this->mFetchCache[$res]))
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return false;
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for ($i = 1; $i <= $this->mNcols[$res]; $i++) {
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$name = $this->mFieldNames[$res][$i];
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$type = $this->mFieldTypes[$res][$i];
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if (isset($this->mFetchCache[$res][$this->mFetchID[$res]][$name]))
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$value = $this->mFetchCache[$res][$this->mFetchID[$res]][$name];
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else $value = NULL;
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$key = strtolower($name);
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wfdebug("'$key' => '$value'\n");
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$ret[$key] = $value;
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}
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$this->mFetchID[$res]++;
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return $ret;
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}
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function fetchRow($res) {
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$r = $this->fetchAssoc($res);
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if (!$r)
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return false;
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$i = 0;
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$ret = array();
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foreach ($r as $key => $value) {
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wfdebug("ret[$i]=[$value]\n");
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$ret[$i++] = $value;
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}
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return $ret;
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}
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function fetchObject($res) {
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$row = $this->fetchAssoc($res);
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if (!$row)
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return false;
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$ret = new stdClass;
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foreach ($row as $key => $value)
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$ret->$key = $value;
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return $ret;
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}
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function numRows($res) {
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return count($this->mFetchCache[$res]);
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}
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function numFields( $res ) { return pg_num_fields( $res ); }
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function fieldName( $res, $n ) { return pg_field_name( $res, $n ); }
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/**
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* This must be called after nextSequenceVal
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*/
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function insertId() {
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return $this->mInsertId;
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}
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function dataSeek($res, $row) {
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$this->mFetchID[$res] = $row;
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}
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function lastError() {
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if ($this->mErr === false) {
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if ($this->mLastResult !== false) $what = $this->mLastResult;
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else if ($this->mConn !== false) $what = $this->mConn;
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else $what = false;
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$err = ($what !== false) ? oci_error($what) : oci_error();
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if ($err === false)
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$this->mErr = 'no error';
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else
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$this->mErr = $err['message'];
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}
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return str_replace("\n", '<br />', $this->mErr);
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}
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function lastErrno() {
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return 0;
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}
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function affectedRows() {
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return $this->mAffectedRows[$this->mLastResult];
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}
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/**
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* Returns information about an index
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* If errors are explicitly ignored, returns NULL on failure
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*/
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function indexInfo ($table, $index, $fname = 'Database::indexInfo' ) {
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$table = $this->tableName($table, true);
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if ($index == 'PRIMARY')
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$index = "${table}_pk";
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$sql = "SELECT uniqueness FROM all_indexes WHERE table_name='" .
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$table . "' AND index_name='" .
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$this->strencode(strtoupper($index)) . "'";
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$res = $this->query($sql, $fname);
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if (!$res)
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return NULL;
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if (($row = $this->fetchObject($res)) == NULL)
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return false;
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$this->freeResult($res);
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$row->Non_unique = !$row->uniqueness;
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return $row;
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}
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function indexUnique ($table, $index, $fname = 'indexUnique') {
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if (!($i = $this->indexInfo($table, $index, $fname)))
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return $i;
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return $i->uniqueness == 'UNIQUE';
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}
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function fieldInfo( $table, $field ) {
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$o = new stdClass;
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$o->multiple_key = true; /* XXX */
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return $o;
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}
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function getColumnInformation($table, $field) {
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$table = $this->tableName($table, true);
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$field = strtoupper($field);
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$res = $this->doQuery("SELECT * FROM all_tab_columns " .
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"WHERE table_name='".$table."' " .
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"AND column_name='".$field."'");
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if (!$res)
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return false;
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$o = $this->fetchObject($res);
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$this->freeResult($res);
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return $o;
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}
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function fieldExists( $table, $field, $fname = 'Database::fieldExists' ) {
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$column = $this->getColumnInformation($table, $field);
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if (!$column)
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return false;
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return true;
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}
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function tableName($name, $forddl = false) {
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# First run any transformations from the parent object
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$name = parent::tableName( $name );
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# Replace backticks into empty
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# Note: "foo" and foo are not the same in Oracle!
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$name = str_replace('`', '', $name);
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# Now quote Oracle reserved keywords
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switch( $name ) {
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case 'user':
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case 'group':
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case 'validate':
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if ($forddl)
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return $name;
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else
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return '"' . $name . '"';
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default:
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return strtoupper($name);
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}
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}
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function strencode( $s ) {
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return str_replace("'", "''", $s);
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}
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/**
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* Return the next in a sequence, save the value for retrieval via insertId()
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*/
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function nextSequenceValue( $seqName ) {
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$r = $this->doQuery("SELECT $seqName.nextval AS val FROM dual");
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$o = $this->fetchObject($r);
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$this->freeResult($r);
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return $this->mInsertId = (int)$o->val;
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}
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/**
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* USE INDEX clause
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* PostgreSQL doesn't have them and returns ""
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*/
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function useIndexClause( $index ) {
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return '';
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}
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# REPLACE query wrapper
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# PostgreSQL simulates this with a DELETE followed by INSERT
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# $row is the row to insert, an associative array
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# $uniqueIndexes is an array of indexes. Each element may be either a
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# field name or an array of field names
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#
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# It may be more efficient to leave off unique indexes which are unlikely to collide.
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# However if you do this, you run the risk of encountering errors which wouldn't have
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# occurred in MySQL
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function replace( $table, $uniqueIndexes, $rows, $fname = 'Database::replace' ) {
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$table = $this->tableName( $table );
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if (count($rows)==0) {
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return;
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}
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# Single row case
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if ( !is_array( reset( $rows ) ) ) {
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$rows = array( $rows );
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}
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foreach( $rows as $row ) {
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# Delete rows which collide
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if ( $uniqueIndexes ) {
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$sql = "DELETE FROM $table WHERE ";
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$first = true;
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foreach ( $uniqueIndexes as $index ) {
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if ( $first ) {
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$first = false;
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$sql .= "(";
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} else {
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$sql .= ') OR (';
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}
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if ( is_array( $index ) ) {
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$first2 = true;
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foreach ( $index as $col ) {
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if ( $first2 ) {
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$first2 = false;
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} else {
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$sql .= ' AND ';
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}
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$sql .= $col.'=' . $this->addQuotes( $row[$col] );
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}
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} else {
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$sql .= $index.'=' . $this->addQuotes( $row[$index] );
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}
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}
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$sql .= ')';
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$this->query( $sql, $fname );
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}
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# Now insert the row
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$sql = "INSERT INTO $table (" . $this->makeList( array_keys( $row ), LIST_NAMES ) .') VALUES (' .
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$this->makeList( $row, LIST_COMMA ) . ')';
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$this->query( $sql, $fname );
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}
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}
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# DELETE where the condition is a join
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function deleteJoin( $delTable, $joinTable, $delVar, $joinVar, $conds, $fname = "Database::deleteJoin" ) {
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if ( !$conds ) {
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throw new DBUnexpectedError( $this, 'Database::deleteJoin() called with empty $conds' );
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}
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$delTable = $this->tableName( $delTable );
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$joinTable = $this->tableName( $joinTable );
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$sql = "DELETE FROM $delTable WHERE $delVar IN (SELECT $joinVar FROM $joinTable ";
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if ( $conds != '*' ) {
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$sql .= 'WHERE ' . $this->makeList( $conds, LIST_AND );
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}
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$sql .= ')';
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$this->query( $sql, $fname );
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}
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# Returns the size of a text field, or -1 for "unlimited"
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function textFieldSize( $table, $field ) {
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$table = $this->tableName( $table );
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$sql = "SELECT t.typname as ftype,a.atttypmod as size
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FROM pg_class c, pg_attribute a, pg_type t
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WHERE relname='$table' AND a.attrelid=c.oid AND
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a.atttypid=t.oid and a.attname='$field'";
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$res =$this->query($sql);
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$row=$this->fetchObject($res);
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if ($row->ftype=="varchar") {
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$size=$row->size-4;
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} else {
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$size=$row->size;
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}
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$this->freeResult( $res );
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return $size;
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}
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function lowPriorityOption() {
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return '';
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}
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function limitResult($sql, $limit, $offset) {
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$ret = "SELECT * FROM ($sql) WHERE ROWNUM < " . ((int)$limit + (int)($offset+1));
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if (is_numeric($offset))
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$ret .= " AND ROWNUM >= " . (int)$offset;
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return $ret;
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}
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function limitResultForUpdate($sql, $limit) {
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return $sql;
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}
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/**
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* Returns an SQL expression for a simple conditional.
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* Uses CASE on PostgreSQL.
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*
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* @param string $cond SQL expression which will result in a boolean value
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* @param string $trueVal SQL expression to return if true
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* @param string $falseVal SQL expression to return if false
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* @return string SQL fragment
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*/
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function conditional( $cond, $trueVal, $falseVal ) {
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return " (CASE WHEN $cond THEN $trueVal ELSE $falseVal END) ";
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}
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# FIXME: actually detecting deadlocks might be nice
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function wasDeadlock() {
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return false;
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}
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# Return DB-style timestamp used for MySQL schema
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function timestamp($ts = 0) {
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return $this->strencode(wfTimestamp(TS_ORACLE, $ts));
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# return "TO_TIMESTAMP('" . $this->strencode(wfTimestamp(TS_DB, $ts)) . "', 'RRRR-MM-DD HH24:MI:SS')";
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}
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/**
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* Return aggregated value function call
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*/
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function aggregateValue ($valuedata,$valuename='value') {
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return $valuedata;
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}
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function reportQueryError( $error, $errno, $sql, $fname, $tempIgnore = false ) {
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$message = "A database error has occurred\n" .
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"Query: $sql\n" .
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"Function: $fname\n" .
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"Error: $errno $error\n";
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throw new DBUnexpectedError($this, $message);
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}
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/**
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* @return string wikitext of a link to the server software's web site
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*/
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function getSoftwareLink() {
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return "[http://www.oracle.com/ Oracle]";
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}
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/**
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* @return string Version information from the database
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*/
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function getServerVersion() {
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return oci_server_version($this->mConn);
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}
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function setSchema($schema=false) {
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$schemas=$this->mSchemas;
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if ($schema) { array_unshift($schemas,$schema); }
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$searchpath=$this->makeList($schemas,LIST_NAMES);
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$this->query("SET search_path = $searchpath");
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}
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function begin() {
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}
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function immediateCommit( $fname = 'Database::immediateCommit' ) {
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oci_commit($this->mConn);
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$this->mTrxLevel = 0;
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}
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function rollback( $fname = 'Database::rollback' ) {
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oci_rollback($this->mConn);
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$this->mTrxLevel = 0;
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}
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function getLag() {
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return false;
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}
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function getStatus($which=null) {
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$result = array('Threads_running' => 0, 'Threads_connected' => 0);
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return $result;
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}
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/**
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* Returns an optional USE INDEX clause to go after the table, and a
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* string to go at the end of the query
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*
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* @access private
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*
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* @param array $options an associative array of options to be turned into
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* an SQL query, valid keys are listed in the function.
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* @return array
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*/
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function makeSelectOptions($options) {
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$tailOpts = '';
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if (isset( $options['ORDER BY'])) {
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$tailOpts .= " ORDER BY {$options['ORDER BY']}";
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}
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return array('', $tailOpts);
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}
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function maxListLen() {
|
|
return 1000;
|
|
}
|
|
|
|
/**
|
|
* Query whether a given table exists
|
|
*/
|
|
function tableExists( $table ) {
|
|
$table = $this->tableName($table, true);
|
|
$res = $this->query( "SELECT COUNT(*) as NUM FROM user_tables WHERE table_name='"
|
|
. $table . "'" );
|
|
if (!$res)
|
|
return false;
|
|
$row = $this->fetchObject($res);
|
|
$this->freeResult($res);
|
|
return $row->num >= 1;
|
|
}
|
|
|
|
/**
|
|
* UPDATE wrapper, takes a condition array and a SET array
|
|
*/
|
|
function update( $table, $values, $conds, $fname = 'Database::update' ) {
|
|
$table = $this->tableName( $table );
|
|
|
|
$sql = "UPDATE $table SET ";
|
|
$first = true;
|
|
foreach ($values as $field => $v) {
|
|
if ($first)
|
|
$first = false;
|
|
else
|
|
$sql .= ", ";
|
|
$sql .= "$field = :n$field ";
|
|
}
|
|
if ( $conds != '*' ) {
|
|
$sql .= " WHERE " . $this->makeList( $conds, LIST_AND );
|
|
}
|
|
$stmt = $this->parseStatement($sql);
|
|
if ($stmt === false) {
|
|
$this->reportQueryError( $this->lastError(), $this->lastErrno(), $stmt );
|
|
return false;
|
|
}
|
|
if ($this->debug())
|
|
wfDebug("SQL: $sql\n");
|
|
$s = '';
|
|
foreach ($values as $field => $v) {
|
|
oci_bind_by_name($stmt, ":n$field", $values[$field]);
|
|
if ($this->debug())
|
|
$s .= " [$field] = [$v]\n";
|
|
}
|
|
if ($this->debug())
|
|
wfdebug(" PH: $s\n");
|
|
$ret = $this->executeStatement($stmt);
|
|
return $ret;
|
|
}
|
|
|
|
/**
|
|
* INSERT wrapper, inserts an array into a table
|
|
*
|
|
* $a may be a single associative array, or an array of these with numeric keys, for
|
|
* multi-row insert.
|
|
*
|
|
* Usually aborts on failure
|
|
* If errors are explicitly ignored, returns success
|
|
*/
|
|
function insert( $table, $a, $fname = 'Database::insert', $options = array() ) {
|
|
# No rows to insert, easy just return now
|
|
if ( !count( $a ) ) {
|
|
return true;
|
|
}
|
|
|
|
$table = $this->tableName( $table );
|
|
if (!is_array($options))
|
|
$options = array($options);
|
|
|
|
$oldIgnore = false;
|
|
if (in_array('IGNORE', $options))
|
|
$oldIgnore = $this->ignoreErrors( true );
|
|
|
|
if ( isset( $a[0] ) && is_array( $a[0] ) ) {
|
|
$multi = true;
|
|
$keys = array_keys( $a[0] );
|
|
} else {
|
|
$multi = false;
|
|
$keys = array_keys( $a );
|
|
}
|
|
|
|
$sql = "INSERT INTO $table (" . implode( ',', $keys ) . ') VALUES (';
|
|
$return = '';
|
|
$first = true;
|
|
foreach ($a as $key => $value) {
|
|
if ($first)
|
|
$first = false;
|
|
else
|
|
$sql .= ", ";
|
|
if (is_object($value) && $value->isLOB()) {
|
|
$sql .= "EMPTY_BLOB()";
|
|
$return = "RETURNING $key INTO :bobj";
|
|
} else
|
|
$sql .= ":$key";
|
|
}
|
|
$sql .= ") $return";
|
|
|
|
if ($this->debug()) {
|
|
wfDebug("SQL: $sql\n");
|
|
}
|
|
|
|
if (($stmt = $this->parseStatement($sql)) === false) {
|
|
$this->reportQueryError($this->lastError(), $this->lastErrno(), $sql, $fname);
|
|
$this->ignoreErrors($oldIgnore);
|
|
return false;
|
|
}
|
|
|
|
/*
|
|
* If we're inserting multiple rows, parse the statement once and
|
|
* execute it for each set of values. Otherwise, convert it into an
|
|
* array and pretend.
|
|
*/
|
|
if (!$multi)
|
|
$a = array($a);
|
|
|
|
foreach ($a as $key => $row) {
|
|
$blob = false;
|
|
$bdata = false;
|
|
$s = '';
|
|
foreach ($row as $k => $value) {
|
|
if (is_object($value) && $value->isLOB()) {
|
|
$blob = oci_new_descriptor($this->mConn, OCI_D_LOB);
|
|
$bdata = $value->data();
|
|
oci_bind_by_name($stmt, ":bobj", $blob, -1, OCI_B_BLOB);
|
|
} else
|
|
oci_bind_by_name($stmt, ":$k", $a[$key][$k], -1);
|
|
if ($this->debug())
|
|
$s .= " [$k] = {$row[$k]}";
|
|
}
|
|
if ($this->debug())
|
|
wfDebug(" PH: $s\n");
|
|
if (($s = $this->executeStatement($stmt)) === false) {
|
|
$this->reportQueryError($this->lastError(), $this->lastErrno(), $sql, $fname);
|
|
$this->ignoreErrors($oldIgnore);
|
|
return false;
|
|
}
|
|
|
|
if ($blob) {
|
|
$blob->save($bdata);
|
|
}
|
|
}
|
|
$this->ignoreErrors($oldIgnore);
|
|
return $this->mLastResult = $s;
|
|
}
|
|
|
|
function ping() {
|
|
return true;
|
|
}
|
|
|
|
function encodeBlob($b) {
|
|
return new OracleBlob($b);
|
|
}
|
|
}
|
|
|
|
?>
|