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OCI8Connection.php

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<?php
/*
 *  $Id: OCI8Connection.php,v 1.13 2004/03/20 04:16:50 hlellelid Exp $
 *
 * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS
 * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT
 * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR
 * A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
 * OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
 * SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT
 * LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
 * DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
 * THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
 * (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE
 * OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
 *
 * This software consists of voluntary contributions made by many individuals
 * and is licensed under the LGPL. For more information please see
 * <http://creole.phpdb.org>.
 */
 
require_once 'creole/Connection.php';
require_once 'creole/common/ConnectionCommon.php';

class OCI8Connection extends ConnectionCommon implements Connection {        
    
    protected $lastStmt = null;    

    function connect($dsninfo, $flags = 0)
    {
        if (!extension_loaded('oci8')) {
            throw new SQLException('oci8 extension not loaded');
        }

        $this->dsn = $dsninfo;
        $this->flags = $flags;
        
        $persistent = ($flags & Creole::PERSISTENT === Creole::PERSISTENT);
        
        $user     = $dsninfo['username'];
           $pw       = $dsninfo['password'];
        $hostspec = $dsninfo['hostspec'];

        $connect_function = $persistent ? 'OCIPLogon' : 'OCILogon';

           @ini_set('track_errors', true);
        if ($hostspec && $user && $pw) {
               $conn = @$connect_function($user, $pw, $hostspec);
        } elseif ($user || $pw) {
               $conn = @$connect_function($user, $pw);
        } else {
               $conn = false;
        }
        @ini_restore('track_errors');
        
        if ($conn == false) {
            $error = @OCIError();
            $error = (is_array($error)) ? $error['message'] : null;
            throw new SQLException("connect failed", $err);
        }

        $this->dblink = $conn;
    }


    function close()
    {
        @OCILogOff($this->dblink);
    }        
    
    function executeQuery($sql, $fetchmode = null)
    {
        $this->lastQuery = $sql;
        
        $result = @OCIParse($this->dblink, $sql);

        if (!$result) {
            throw new SQLException("Unable to prepare query", $this->nativeError(), $sql);
        }

        $success = @OCIExecute($result,OCI_DEFAULT);
        if (!$success) {
            throw new SQLException("Unable to execute query", $this->nativeError($result), $sql);
        }
        
        return new OCI8ResultSet($this, $result, $fetchmode);
    }

    
    function executeUpdate($sql)
    {    
        $this->lastQuery = $sql;

        $statement = @OCIParse($this->dblink, $sql);
        if (!$statement) {
            throw new SQLException("Unable to prepare update", $this->nativeError(), $sql);            
        }
                
        if ($this->autocommit) {
            $success = @OCIExecute($statement, OCI_COMMIT_ON_SUCCESS);
        } else {
            $success = @OCIExecute($statement, OCI_DEFAULT);
            $this->transactionOpcount++;
        }

        if (!$success) {
            throw new SQLException("Unable to execute update", $this->nativeError($statement), $sql);
        }

        $this->lastStmt = $statement;

        return @OCIRowCount($statement);
    }

    function commit()
    {
        if ($this->transactionOpcount > 0) {
            $result = @OCICommit($this->dblink);
            $this->transactionOpcount = 0;
            if (!$result) {
                throw new SQLException("Unable to commit transaction", $this->nativeError());
            }
            return true;
        }
    }

    
    function rollback()
    {
        if ($this->transactionOpcount > 0) {
            $result = @OCIRollback($this->dblink);
            if (!$result) {
                throw new SQLException("Unable to rollback transaction", $this->nativeError());
            }
            return true;
        }
    }

    
    function getUpdateCount()
    {
        if (!$this->lastStmt) {
            return 0;
        }
        $result = @OCIRowCount($this->lastStmt);
        if ($result === false) {
            throw new SQLException("Update count failed", $this->nativeError($this->lastStmt));
        }
        return $result;
    }


   public function applyLimit(&$sql, $offset, $limit)
   {
        $sql = 'SELECT B.* FROM ( ' . 
                   'SELECT A.*, rownum AS CREOLE$ROWNUM FROM ( ' . $sql . ' ) A ' .
                ') B WHERE ';
        if ($offset > 0) {
            $sql .= ' B.CREOLE$ROWNUM > ' . $offset;            
            if ($limit > 0) {
                $sql .= ' AND B.CREOLE$ROWNUM <= ' . ($offset + $limit);
            }
        } else {
               $sql .= ' B.CREOLE$ROWNUM <= ' . $limit;
       }
   } 

    public function nativeError($result = null)
    {
           if ($result !== null) {
            $error = OCIError($result);
        } else {
            $error = OCIError($this->dblink);
        }         
        return $error['code'] . ": " . $error['message'];
    }
    
    
    public function getDatabaseInfo()
    {
        require_once 'creole/drivers/oracle/metadata/OCI8DatabaseInfo.php';
        return new OCI8DatabaseInfo($this);
    }
    
    public function getIdGenerator()
    {
        require_once 'creole/drivers/oracle/OCI8IdGenerator.php';
        return new OCI8IdGenerator($this);
    }
    
    public function prepareStatement($sql) 
    {
        require_once 'creole/drivers/oracle/OCI8PreparedStatement.php';
        return new OCI8PreparedStatement($this, $sql);
    }
    
    public function prepareCall($sql) {
        throw new SQLException('Oracle driver does not yet support stored procedures using CallableStatement.');
    }
    
    public function createStatement()
    {
        require_once 'creole/drivers/oracle/OCI8Statement.php';
        return new OCI8Statement($this);
    }
}

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This file is part of the Creole[php5] library.