pgsql.php

FP2 CRM code+Mysql DB

<?php

/* vim: set expandtab tabstop=4 shiftwidth=4 softtabstop=4: */

/**
 * The PEAR DB driver for PHP's pgsql extension
 * for interacting with PostgreSQL databases
 *
 * PHP versions 4 and 5
 *
 * LICENSE: This source file is subject to version 3.0 of the PHP license
 * that is available through the world-wide-web at the following URI:
 * http://www.php.net/license/3_0.txt.  If you did not receive a copy of
 * the PHP License and are unable to obtain it through the web, please
 * send a note to [e-mail] so we can mail you a copy immediately.
 *
 * @category   Database
 * @package    DB
 * @author     Rui Hirokawa <[e-mail]>
 * @author     Stig Bakken <[e-mail]>
 * @author     Daniel Convissor <[e-mail]>
 * @copyright  1997-2005 The PHP Group
 * @license    http://www.php.net/license/3_0.txt  PHP License 3.0
 * @version    CVS: $Id: pgsql.php,v 1.126 2005/03/04 23:12:36 danielc Exp $
 * @link       http://pear.php.net/package/DB
 */

/**
 * Obtain the DB_common class so it can be extended from
 */
require_once 'DB/common.php';

/**
 * The methods PEAR DB uses to interact with PHP's pgsql extension
 * for interacting with PostgreSQL databases
 *
 * These methods overload the ones declared in DB_common.
 *
 * @category   Database
 * @package    DB
 * @author     Rui Hirokawa <[e-mail]>
 * @author     Stig Bakken <[e-mail]>
 * @author     Daniel Convissor <[e-mail]>
 * @copyright  1997-2005 The PHP Group
 * @license    http://www.php.net/license/3_0.txt  PHP License 3.0
 * @version    Release: 1.7.6
 * @link       http://pear.php.net/package/DB
 */
class DB_pgsql extends DB_common
{
    // {{{ properties

    /**
     * The DB driver type (mysql, oci8, odbc, etc.)
     * @var string
     */
    var $phptype = 'pgsql';

    /**
     * The database syntax variant to be used (db2, access, etc.), if any
     * @var string
     */
    var $dbsyntax = 'pgsql';

    /**
     * The capabilities of this DB implementation
     *
     * The 'new_link' element contains the PHP version that first provided
     * new_link support for this DBMS.  Contains false if it's unsupported.
     *
     * Meaning of the 'limit' element:
     *   + 'emulate' = emulate with fetch row by number
     *   + 'alter'   = alter the query
     *   + false     = skip rows
     *
     * @var array
     */
    var $features = array(
        'limit'         => 'alter',
        'new_link'      => '4.3.0',
        'numrows'       => true,
        'pconnect'      => true,
        'prepare'       => false,
        'ssl'           => true,
        'transactions'  => true,
    );

    /**
     * A mapping of native error codes to DB error codes
     * @var array
     */
    var $errorcode_map = array(
    );

    /**
     * The raw database connection created by PHP
     * @var resource
     */
    var $connection;

    /**
     * The DSN information for connecting to a database
     * @var array
     */
    var $dsn = array();


    /**
     * Should data manipulation queries be committed automatically?
     * @var bool
     * @access private
     */
    var $autocommit = true;

    /**
     * The quantity of transactions begun
     *
     * {@internal  While this is private, it can't actually be designated
     * private in PHP 5 because it is directly accessed in the test suite.}}
     *
     * @var integer
     * @access private
     */
    var $transaction_opcount = 0;

    /**
     * The number of rows affected by a data manipulation query
     * @var integer
     */
    var $affected = 0;

    /**
     * The current row being looked at in fetchInto()
     * @var array
     * @access private
     */
    var $row = array();

    /**
     * The number of rows in a given result set
     * @var array
     * @access private
     */
    var $_num_rows = array();


    // }}}
    // {{{ constructor

    /**
     * This constructor calls <kbd>$this->DB_common()</kbd>
     *
     * @return void
     */
    function DB_pgsql()
    {
        $this->DB_common();
    }

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

    /**
     * Connect to the database server, log in and open the database
     *
     * Don't call this method directly.  Use DB::connect() instead.
     *
     * PEAR DB's pgsql driver supports the following extra DSN options:
     *   + connect_timeout  How many seconds to wait for a connection to
     *                       be established.  Available since PEAR DB 1.7.0.
     *   + new_link         If set to true, causes subsequent calls to
     *                       connect() to return a new connection link
     *                       instead of the existing one.  WARNING: this is
     *                       not portable to other DBMS's.  Available only
     *                       if PHP is >= 4.3.0 and PEAR DB is >= 1.7.0.
     *   + options          Command line options to be sent to the server.
     *                       Available since PEAR DB 1.6.4.
     *   + service          Specifies a service name in pg_service.conf that
     *                       holds additional connection parameters.
     *                       Available since PEAR DB 1.7.0.
     *   + sslmode          How should SSL be used when connecting?  Values:
     *                       disable, allow, prefer or require.
     *                       Available since PEAR DB 1.7.0.
     *   + tty              This was used to specify where to send server
     *                       debug output.  Available since PEAR DB 1.6.4.
     *
     * Example of connecting to a new link via a socket:
     * <code>
     * require_once 'DB.php';
     * 
     * $dsn = 'pgsql://user:pass@unix(/tmp)/dbname?new_link=true';
     * $options = array(
     *     'portability' => DB_PORTABILITY_ALL,
     * );
     * 
     * $db =& DB::connect($dsn, $options);
     * if (PEAR::isError($db)) {
     *     die($db->getMessage());
     * }
     * </code>
     *
     * @param array $dsn         the data source name
     * @param bool  $persistent  should the connection be persistent?
     *
     * @return int  DB_OK on success. A DB_Error object on failure.
     *
     * @link http://www.postgresql.org/docs/current/static/libpq.html#LIBPQ-CONNECT
     */
    function connect($dsn, $persistent = false)
    {
        if (!PEAR::loadExtension('pgsql')) {
            return $this->raiseError(DB_ERROR_EXTENSION_NOT_FOUND);
        }

        $this->dsn = $dsn;
        if ($dsn['dbsyntax']) {
            $this->dbsyntax = $dsn['dbsyntax'];
        }

        $protocol = $dsn['protocol'] ? $dsn['protocol'] : 'tcp';

        $params = array('');
        if ($protocol == 'tcp') {
            if ($dsn['hostspec']) {
                $params[0] .= 'host=' . $dsn['hostspec'];
            }
            if ($dsn['port']) {
                $params[0] .= ' port=' . $dsn['port'];
            }
        } elseif ($protocol == 'unix') {
            // Allow for pg socket in non-standard locations.
            if ($dsn['socket']) {
                $params[0] .= 'host=' . $dsn['socket'];
            }
            if ($dsn['port']) {
                $params[0] .= ' port=' . $dsn['port'];
            }
        }
        if ($dsn['database']) {
            $params[0] .= ' dbname=\'' . addslashes($dsn['database']) . '\'';
        }
        if ($dsn['username']) {
            $params[0] .= ' user=\'' . addslashes($dsn['username']) . '\'';
        }
        if ($dsn['password']) {
            $params[0] .= ' password=\'' . addslashes($dsn['password']) . '\'';
        }
        if (!empty($dsn['options'])) {
            $params[0] .= ' options=' . $dsn['options'];
        }
        if (!empty($dsn['tty'])) {
            $params[0] .= ' tty=' . $dsn['tty'];
        }
        if (!empty($dsn['connect_timeout'])) {
            $params[0] .= ' connect_timeout=' . $dsn['connect_timeout'];
        }
        if (!empty($dsn['sslmode'])) {
            $params[0] .= ' sslmode=' . $dsn['sslmode'];
        }
        if (!empty($dsn['service'])) {
            $params[0] .= ' service=' . $dsn['service'];
        }

        if (isset($dsn['new_link'])
            && ($dsn['new_link'] == 'true' || $dsn['new_link'] === true))
        {
            if (version_compare(phpversion(), '4.3.0', '>=')) {
                $params[] = PGSQL_CONNECT_FORCE_NEW;
            }
        }

        $connect_function = $persistent ? 'pg_pconnect' : 'pg_connect';

        $ini = ini_get('track_errors');
        $php_errormsg = '';
        if ($ini) {
            $this->connection = @call_user_func_array($connect_function,
                                                      $params);
        } else {
            ini_set('track_errors', 1);
            $this->connection = @call_user_func_array($connect_function,
                                                      $params);
            ini_set('track_errors', $ini);
        }

        if (!$this->connection) {
            return $this->raiseError(DB_ERROR_CONNECT_FAILED,
                                     null, null, null,
                                     $php_errormsg);
        }
        return DB_OK;
    }

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

    /**
     * Disconnects from the database server
     *
     * @return bool  TRUE on success, FALSE on failure
     */
    function disconnect()
    {
        $ret = @pg_close($this->connection);
        $this->connection = null;
        return $ret;
    }

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

    /**
     * Sends a query to the database server
     *
     * @param string  the SQL query string
     *
     * @return mixed  + a PHP result resrouce for successful SELECT queries
     *                + the DB_OK constant for other successful queries
     *                + a DB_Error object on failure
     */
    function simpleQuery($query)
    {
        $ismanip = DB::isManip($query);
        $this->last_query = $query;
        $query = $this->modifyQuery($query);
        if (!$this->autocommit && $ismanip) {
            if ($this->transaction_opcount == 0) {
                $result = @pg_exec($this->connection, 'begin;');
                if (!$result) {
                    return $this->pgsqlRaiseError();
                }
            }
            $this->transaction_opcount++;
        }
        $result = @pg_exec($this->connection, $query);
        if (!$result) {
            return $this->pgsqlRaiseError();
        }
        // Determine which queries that should return data, and which
        // should return an error code only.
        if ($ismanip) {
            $this->affected = @pg_affected_rows($result);
            return DB_OK;
        } elseif (preg_match('/^\s*\(*\s*(SELECT|EXPLAIN|SHOW)\s/si', $query)) {
            /* PostgreSQL commands:
               ABORT, ALTER, BEGIN, CLOSE, CLUSTER, COMMIT, COPY,
               CREATE, DECLARE, DELETE, DROP TABLE, EXPLAIN, FETCH,
               GRANT, INSERT, LISTEN, LOAD, LOCK, MOVE, NOTIFY, RESET,
               REVOKE, ROLLBACK, SELECT, SELECT INTO, SET, SHOW,
               UNLISTEN, UPDATE, VACUUM
            */
            $this->row[(int)$result] = 0; // reset the row counter.
            $numrows = $this->numRows($result);
            if (is_object($numrows)) {
                return $numrows;
            }
            $this->_num_rows[(int)$result] = $numrows;
            $this->affected = 0;
            return $result;
        } else {
            $this->affected = 0;
            return DB_OK;
        }
    }

    // }}}