Библиотека для cis, online, cms1
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Фёдор Подлеснов
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393
creole/drivers/oracle/OCI8Connection.php
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393
creole/drivers/oracle/OCI8Connection.php
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<?php
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/**
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* $Id: OCI8Connection.php,v 1.18 2005/10/17 19:03:51 dlawson_mi Exp $
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*
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* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
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* "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
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* LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
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* A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
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* OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
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* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES ( INCLUDING, BUT NOT
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* LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
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* DATA, OR PROFITS; OR BUSINESS INTERRUPTION ) HOWEVER CAUSED AND ON ANY
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* THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
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* ( INCLUDING NEGLIGENCE OR OTHERWISE ) ARISING IN ANY WAY OUT OF THE USE
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* OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
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*
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* This software consists of voluntary contributions made by many individuals
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* and is licensed under the LGPL. For more information please see
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* <http://creole.phpdb.org>.
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*/
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require_once 'creole/Connection.php';
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require_once 'creole/common/ConnectionCommon.php';
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include_once 'creole/drivers/oracle/OCI8ResultSet.php';
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/**
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* Oracle implementation of Connection.
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*
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* @author David Giffin <david@giffin.org>
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* @author Hans Lellelid <hans@xmpl.org>
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* @author Stig Bakken <ssb@fast.no>
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* @author Lukas Smith
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* @version $Revision: 1.18 $
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* @package creole.drivers.oracle
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*/
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class OCI8Connection extends ConnectionCommon implements Connection
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{
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protected $lastStmt = null;
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/**
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* Auto commit mode for oci_execute
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* @var int
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*/
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protected $execMode = OCI_COMMIT_ON_SUCCESS;
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/**
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* Connect to a database and log in as the specified user.
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*
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* @param array $dsn The data source hash.
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* @param int $flags Any connection flags.
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* @access public
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* @throws SQLException
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* @return void
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*/
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function connect( $dsninfo, $flags = 0 )
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{
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if ( !extension_loaded( 'oci8' ) )
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{
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throw new SQLException( 'oci8 extension not loaded' );
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}
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$this->dsn = $dsninfo;
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$this->flags = $flags;
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$persistent =
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( $flags & Creole::PERSISTENT === Creole::PERSISTENT );
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$user = $dsninfo[ 'username' ];
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$pw = $dsninfo[ 'password' ];
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$hostspec = $dsninfo[ 'hostspec' ];
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$db = $dsninfo[ 'database' ];
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$connect_function = ( $persistent )
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? 'oci_pconnect'
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: 'oci_connect';
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$encoding = !empty($dsninfo['encoding']) ? $dsninfo['encoding'] : null;
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@ini_set( 'track_errors', true );
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if ( $db && $hostspec && $user && $pw )
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{
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$conn = @$connect_function( $user, $pw, "//$hostspec/$db", $encoding);
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}
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elseif ( $hostspec && $user && $pw )
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{
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$conn = @$connect_function( $user, $pw, $hostspec, $encoding );
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}
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elseif ( $user || $pw )
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{
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$conn = @$connect_function( $user, $pw, null, $encoding );
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}
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else
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{
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$conn = false;
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}
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@ini_restore( 'track_errors' );
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if ( $conn == false )
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{
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$error = oci_error();
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$error = ( is_array( $error ) )
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? $error[ 'message' ]
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: null;
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throw new SQLException( 'connect failed', $error );
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}
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$this->dblink = $conn;
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//connected ok, need to set a few environment settings
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//please note, if this is changed, the function setTimestamp and setDate in OCI8PreparedStatement.php
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//must be changed to match
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$sql = "ALTER SESSION SET NLS_DATE_FORMAT='YYYY-MM-DD HH24:MI:SS'";
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$this->executeQuery($sql);
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}
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/**
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* @see Connection::disconnect()
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*/
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function close()
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{
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$ret = @oci_close( $this->dblink );
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$this->dblink = null;
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return $ret;
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}
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/**
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* @see Connection::executeQuery()
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*/
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function executeQuery( $sql, $fetchmode = null )
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{
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$this->lastQuery = $sql;
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// $result = @oci_parse( $this->dblink, $sql );
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$result = oci_parse( $this->dblink, $sql );
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if ( ! $result )
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{
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throw new SQLException( 'Unable to prepare query'
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, $this->nativeError()
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, $sql
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);
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}
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$success = oci_execute( $result, $this->execMode );
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if ( ! $success )
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{
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throw new SQLException( 'Unable to execute query'
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, $this->nativeError( $result )
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, $sql
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);
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}
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return new OCI8ResultSet( $this, $result, $fetchmode );
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}
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/**
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* @see Connection::simpleUpdate()
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*/
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function executeUpdate( $sql )
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{
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$this->lastQuery = $sql;
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$statement = oci_parse( $this->dblink, $sql );
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if ( ! $statement )
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{
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throw new SQLException( 'Unable to prepare update'
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, $this->nativeError()
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, $sql
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);
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}
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$success = oci_execute( $statement, $this->execMode );
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if ( ! $success )
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{
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throw new SQLException( 'Unable to execute update'
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, $this->nativeError( $statement )
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, $sql
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);
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}
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$this->lastStmt = $statement;
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return oci_num_rows( $statement );
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}
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/**
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* Start a database transaction.
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* @throws SQLException
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* @return void
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*/
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protected function beginTrans()
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{
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$this->execMode = OCI_DEFAULT;
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}
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/**
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* Commit the current transaction.
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* @throws SQLException
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* @return void
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*/
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protected function commitTrans()
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{
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$result = oci_commit( $this->dblink );
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if ( ! $result )
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{
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throw new SQLException( 'Unable to commit transaction'
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, $this->nativeError()
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);
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}
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$this->execMode = OCI_COMMIT_ON_SUCCESS;
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}
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/**
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* Roll back ( undo ) the current transaction.
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* @throws SQLException
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* @return void
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*/
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protected function rollbackTrans()
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{
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$result = oci_rollback( $this->dblink );
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if ( ! $result )
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{
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throw new SQLException( 'Unable to rollback transaction'
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, $this->nativeError()
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);
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}
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$this->execMode = OCI_COMMIT_ON_SUCCESS;
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}
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/**
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* Gets the number of rows affected by the data manipulation
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* query.
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*
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* @return int Number of rows affected by the last query.
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* @todo -cOCI8Connection Figure out whether getUpdateCount() should throw exception on error or just return 0.
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*/
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function getUpdateCount()
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{
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if ( ! $this->lastStmt )
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{
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return 0;
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}
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$result = oci_num_rows( $this->lastStmt );
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if ( $result === false )
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{
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throw new SQLException( 'Update count failed'
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, $this->nativeError( $this->lastStmt )
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);
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}
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return $result;
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}
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/**
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* Build Oracle-style query with limit or offset.
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* If the original SQL is in variable: query then the requlting
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* SQL looks like this:
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* <pre>
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* SELECT B.* FROM (
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* SELECT A.*, rownum as TORQUE$ROWNUM FROM (
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* query
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* ) A
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* ) B WHERE B.TORQUE$ROWNUM > offset AND B.TORQUE$ROWNUM
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* <= offset + limit
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* </pre>
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*
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* @param string &$sql the query
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* @param int $offset
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* @param int $limit
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* @return void ( $sql parameter is currently manipulated directly )
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*/
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public function applyLimit( &$sql, $offset, $limit )
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{
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$sql =
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'SELECT B.* FROM ( '
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. 'SELECT A.*, rownum AS CREOLE$ROWNUM FROM ( '
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. $sql
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. ' ) A '
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. ' ) B WHERE ';
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if ( $offset > 0 )
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{
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$sql .= ' B.CREOLE$ROWNUM > ' . $offset;
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if ( $limit > 0 )
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{
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$sql .= ' AND B.CREOLE$ROWNUM <= '
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. ( $offset + $limit );
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}
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}
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else
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{
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$sql .= ' B.CREOLE$ROWNUM <= ' . $limit;
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}
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}
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/**
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* Get the native Oracle Error Message as a string.
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*
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* @param string $msg The Internal Error Message
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* @param mixed $errno The Oracle Error resource
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*/
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public function nativeError( $result = null )
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{
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if ( $result !== null )
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{
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$error = oci_error( $result );
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}
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else
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{
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$error = oci_error( $this->dblink );
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}
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return $error[ 'code' ] . ': ' . $error[ 'message' ];
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}
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/**
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* @see Connection::getDatabaseInfo()
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*/
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public function getDatabaseInfo()
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{
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require_once 'creole/drivers/oracle/metadata/OCI8DatabaseInfo.php';
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return new OCI8DatabaseInfo( $this );
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}
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/**
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* @see Connection::getIdGenerator()
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*/
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public function getIdGenerator()
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{
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require_once 'creole/drivers/oracle/OCI8IdGenerator.php';
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return new OCI8IdGenerator( $this );
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}
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/**
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* Oracle supports native prepared statements, but the oci_parse call
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* is actually called by the OCI8PreparedStatement class because
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* some additional SQL processing may be necessary ( e.g. to apply limit ).
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* @see OCI8PreparedStatement::executeQuery()
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* @see OCI8PreparedStatement::executeUpdate()
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* @see Connection::prepareStatement()
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*/
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public function prepareStatement( $sql )
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{
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require_once 'creole/drivers/oracle/OCI8PreparedStatement.php';
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return new OCI8PreparedStatement( $this, $sql );
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}
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/**
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* @see Connection::prepareCall()
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*/
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public function prepareCall( $sql )
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{
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throw new SQLException( 'Oracle driver does not yet support stored procedures using CallableStatement.' );
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}
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/**
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* @see Connection::createStatement()
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*/
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public function createStatement()
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{
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require_once 'creole/drivers/oracle/OCI8Statement.php';
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return new OCI8Statement( $this );
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}
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}
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