oci8.php

apache windows下的一款好

<?php
//
// +----------------------------------------------------------------------+
// | PHP version 4.0                                                      |
// +----------------------------------------------------------------------+
// | Copyright (c) 1997-2001 The PHP Group                                |
// +----------------------------------------------------------------------+
// | This source file is subject to version 2.02 of the PHP license,      |
// | that is bundled with this package in the file LICENSE, and is        |
// | available at through the world-wide-web at                           |
// | http://www.php.net/license/2_02.txt.                                 |
// | If you did not receive a copy of the PHP license and are unable to   |
// | obtain it through the world-wide-web, please send a note to          |
// | [e-mail] so we can mail you a copy immediately.               |
// +----------------------------------------------------------------------+
// | Authors: James L. Pine <[e-mail]>                             |
// |                                                                      |
// +----------------------------------------------------------------------+
//
// $Id: oci8.php,v 1.26.2.2 2001/11/13 01:26:42 ssb Exp $
//
// Database independent query interface definition for PHP's Oracle 8
// call-interface extension.
//

//
// be aware...  OCIError() only appears to return anything when given a
// statement, so functions return the generic DB_ERROR instead of more
// useful errors that have to do with feedback from the database.
//


require_once 'DB/common.php';

class DB_oci8 extends DB_common
{
    // {{{ properties

    var $connection;
    var $phptype, $dbsyntax;
    var $manip_query = array();
    var $prepare_types = array();
    var $autoCommit = 1;
    var $last_stmt = false;

    // }}}
    // {{{ constructor

    function DB_oci8()
    {
        $this->DB_common();
        $this->phptype = 'oci8';
        $this->dbsyntax = 'oci8';
        $this->features = array(
            'prepare' => false,
            'pconnect' => true,
            'transactions' => true,
            'limit' => 'alter'
        );
        $this->errorcode_map = array(
            900 => DB_ERROR_SYNTAX,
            904 => DB_ERROR_NOSUCHFIELD,
            923 => DB_ERROR_SYNTAX,
            942 => DB_ERROR_NOSUCHTABLE,
            955 => DB_ERROR_ALREADY_EXISTS,
            1476 => DB_ERROR_DIVZERO,
            1722 => DB_ERROR_INVALID_NUMBER,
            2289 => DB_ERROR_NOSUCHTABLE,
            2291 => DB_ERROR_CONSTRAINT,
            2449 => DB_ERROR_CONSTRAINT,
        );
    }

    // }}}
    // {{{ connect()

    /**
     * Connect to a database and log in as the specified user.
     *
     * @param $dsn the data source name (see DB::parseDSN for syntax)
     * @param $persistent (optional) whether the connection should
     *        be persistent
     *
     * @return int DB_OK on success, a DB error code on failure
     */
    function connect($dsninfo, $persistent = false)
    {
        if (!DB::assertExtension("oci8"))
            return $this->raiseError(DB_ERROR_EXTENSION_NOT_FOUND);

        $this->dsn = $dsninfo;
        $user = $dsninfo['username'];
        $pw = $dsninfo['password'];
        $hostspec = $dsninfo['hostspec'];

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

        if ($hostspec) {
            $conn = @$connect_function($user,$pw,$hostspec);
        } elseif ($user || $pw) {
            $conn = @$connect_function($user,$pw);
        } else {
            $conn = false;
        }
        if ($conn == false) {
            return $this->raiseError(DB_ERROR_CONNECT_FAILED);
        }
        $this->connection = $conn;
        return DB_OK;
    }

    // }}}
    // {{{ disconnect()

    /**
     * Log out and disconnect from the database.
     *
     * @return bool TRUE on success, FALSE if not connected.
     */
    function disconnect()
    {
        $ret = @OCILogOff($this->connection);
        $this->connection = null;
        return $ret;
    }

    // }}}
    // {{{ simpleQuery()

    /**
     * Send a query to oracle and return the results as an oci8 resource
     * identifier.
     *
     * @param $query the SQL query
     *
     * @return int returns a valid oci8 result for successful SELECT
     * queries, DB_OK for other successful queries.  A DB error code
     * is returned on failure.
     */
    function simpleQuery($query)
    {
        $this->last_query = $query;
        $query = $this->modifyQuery($query);
        $result = @OCIParse($this->connection, $query);
        if (!$result) {
            return $this->oci8RaiseError();
        }
        if ($this->autoCommit) {
            $success = @OCIExecute($result,OCI_COMMIT_ON_SUCCESS);
        } else {
            $success = @OCIExecute($result,OCI_DEFAULT);
        }
        if (!$success) {
            return $this->oci8RaiseError($result);
        }
        $this->last_stmt=$result;
        // Determine which queries that should return data, and which
        // should return an error code only.
        return DB::isManip($query) ? DB_OK : $result;
    }

    // }}}
    // {{{ nextResult()

    /**
     * Move the internal oracle result pointer to the next available result
     *
     * @param a valid fbsql result resource
     *
     * @access public
     *
     * @return true if a result is available otherwise return false
     */
    function nextResult($result)
    {
        return false;
    }

    // }}}
    // {{{ fetchRow()

    /**
     * Fetch a row and return as array.
     *
     * @param $result oci8 result identifier
     * @param $fetchmode how the resulting array should be indexed
     *
     * @return int an array on success, a DB error code on failure, NULL
     *             if there is no more data
     */
    function &fetchRow($result, $fetchmode = DB_FETCHMODE_DEFAULT)
    {
        if ($fetchmode == DB_FETCHMODE_DEFAULT) {
            $fetchmode = $this->fetchmode;
        }
        if ($fetchmode & DB_FETCHMODE_ASSOC) {
            $moredata = @OCIFetchInto($result, $row, OCI_ASSOC + OCI_RETURN_NULLS + OCI_RETURN_LOBS);
        } else {
            $moredata = @OCIFetchInto($result, $row, OCI_RETURN_NULLS + OCI_RETURN_LOBS);
        }
        if (!$moredata) {
            return NULL;
        }
        return $row;
    }

    // }}}
    // {{{ fetchInto()

    /**
     * Fetch a row and insert the data into an existing array.
     *
     * @param $result oci8 result identifier
     * @param $arr (reference) array where data from the row is stored
     * @param $fetchmode how the array data should be indexed
     * @param $rownum the row number to fetch (not yet supported)
     *
     * @return int DB_OK on success, a DB error code on failure
     */
    function fetchInto($result, &$arr, $fetchmode = DB_FETCHMODE_DEFAULT, $rownum=NULL)
    {
        if ($rownum !== NULL) {
            return $this->raiseError(DB_ERROR_NOT_CAPABLE);
        }
        if ($fetchmode == DB_FETCHMODE_DEFAULT) {
            $fetchmode = $this->fetchmode;
        }
        if ($fetchmode & DB_FETCHMODE_ASSOC) {
            $moredata = @OCIFetchInto($result,$arr,OCI_ASSOC+OCI_RETURN_NULLS+OCI_RETURN_LOBS);
        } else {
            $moredata = @OCIFetchInto($result,$arr,OCI_RETURN_NULLS+OCI_RETURN_LOBS);
        }
        if (!$moredata) {
            return NULL;
        }
        return DB_OK;
    }

    // }}}
    // {{{ freeResult()

    /**
     * Free the internal resources associated with $result.
     *
     * @param $result oci8 result identifier or DB statement identifier
     *
     * @return bool TRUE on success, FALSE if $result is invalid
     */
    function freeResult($result)
    {
        if (is_resource($result)) {
            return @OCIFreeStatement($result);
        }
        if (!isset($this->prepare_tokens[(int)$result])) {
            return false;
        }
        unset($this->prepare_tokens[(int)$result]);
        unset($this->prepare_types[(int)$result]);
        unset($this->manip_query[(int)$result]);
        return true;
    }

    // }}}
    // {{{ numRows()

    function numRows($result)
    {
        // emulate numRows for Oracle.  yuck.
        if ($this->options['optimize'] == 'portability' &&
            $result === $this->last_stmt) {
            $countquery = preg_replace('/^\s*SELECT\s+(.*?)[,\s].*\s+FROM\s+/is',
                                       'SELECT COUNT(\1) FROM ',
                                       $this->last_query);
            $save_query = $this->last_query;
            $save_stmt = $this->last_stmt;
            $count = $this->query($countquery);
            if (DB::isError($count) ||
                DB::isError($row = $count->fetchRow(DB_FETCHMODE_ORDERED)))
            {
                $this->last_query = $save_query;
                $this->last_stmt = $save_stmt;
                return $this->raiseError(DB_ERROR_NOT_CAPABLE);
            }
            return $row[0];
        }
        return $this->raiseError(DB_ERROR_NOT_CAPABLE);
    }

    // }}}
    // {{{ numCols()

    /**
     * Get the number of columns in a result set.
     *
     * @param $result oci8 result identifier
     *
     * @return int the number of columns per row in $result
     */
    function numCols($result)
    {
        $cols = @OCINumCols($result);
        if (!$cols) {
            return $this->oci8RaiseError($result);
        }
        return $cols;
    }

    // }}}
    // {{{ errorNative()

    /**
     * Get the native error code of the last error (if any) that occured
     * on the current connection.  This does not work, as OCIError does
     * not work unless given a statement.  If OCIError does return
     * something, so will this.
     *
     * @return int native oci8 error code
     */
    function errorNative()
    {
        if (is_resource($this->last_stmt)) {
            $error = @OCIError($this->last_stmt);
        } else {
            $error = @OCIError($this->connection);
        }
        if (is_array($error)) {
            return $error['code'];
        }
        return false;
    }

    // }}}
    // {{{ prepare()

    /**
     * Prepares a query for multiple execution with execute().  With
     * oci8, this is emulated.
     * @param $query query to be prepared