mssql.php

apache windows下的一款好

    /**
     * Gets the number of rows affected by the last query.
     * if the last query was a select, returns 0.
     *
     * @return number of rows affected by the last query or DB_ERROR
     */
    function affectedRows()
    {
        if (DB::isManip($this->last_query)) {
            $res = @mssql_query('select @@rowcount', $this->connection);
            if (!$res) {
                return $this->mssqlRaiseError();
            }
            $ar = @mssql_fetch_row($res);
            if (!$ar) {
                $result = 0;
            } else {
                @mssql_free_result($res);
                $result = $ar[0];
            }
        } else {
            $result = 0;
        }
        return $result;
    }
    // {{{ nextId()

    /**
     * Get the next value in a sequence.  We emulate sequences
     * for MSSQL.  Will create the sequence if it does not exist.
     *
     * @access public
     *
     * @param $seq_name the name of the sequence
     *
     * @param $ondemand whether to create the sequence table on demand
     * (default is true)
     *
     * @return a sequence integer, or a DB error
     */
    function nextId($seq_name, $ondemand = true)
    {
        $sqn = preg_replace('/[^a-z0-9_]/i', '_', $seq_name);
        $repeat = 0;
        do {
            $this->pushErrorHandling(PEAR_ERROR_RETURN);
            $result = $this->query("INSERT INTO ${sqn}_seq (vapor) VALUES (0)");
            $this->popErrorHandling();
            if ($ondemand && DB::isError($result) &&
                ($result->getCode() == DB_ERROR || $result->getCode() == DB_ERROR_NOSUCHTABLE))
            {
                $repeat = 1;
                $result = $this->createSequence($seq_name);
                if (DB::isError($result)) {
                    return $result;
                }
            } else {
                $result = $this->query("SELECT @@IDENTITY FROM ${sqn}_seq");
                $repeat = 0;
            }
        } while ($repeat);
        if (DB::isError($result)) {
            return $this->raiseError($result);
        }
        $result = $result->fetchRow(DB_FETCHMODE_ORDERED);
        return $result[0];
    }

    // }}}
    // {{{ createSequence()

    function createSequence($seq_name)
    {
        $sqn = preg_replace('/[^a-z0-9_]/i', '_', $seq_name);
        return $this->query("CREATE TABLE ${sqn}_seq".
                            '([id] [int] IDENTITY (1, 1) NOT NULL ,' .
                            '[vapor] [int] NULL)');
    }
    // }}}
    // {{{ dropSequence()

    function dropSequence($seq_name)
    {
        $sqn = preg_replace('/[^a-z0-9_]/i', '_', $seq_name);
        return $this->query("DROP TABLE ${sqn}_seq");
    }
    // }}}

    function errorCode()
    {
        $this->pushErrorHandling(PEAR_ERROR_RETURN);
        $error_code = $this->getOne('select @@ERROR as ErrorCode');
        $this->popErrorHandling();
        // XXX Debug
        if (!isset($this->errorcode_map[$error_code])) {
            return DB_ERROR;
        }
        return $error_code;
    }

    function mssqlRaiseError($code = null)
    {
        if ($code !== null) {
            $code = $this->errorCode();
            if (DB::isError($code)) {
                return $this->raiseError($code);
            }
        }
        return $this->raiseError($code, null, null, null,
                        mssql_get_last_message());
    }

  /**

     * Returns information about a table or a result set
     *
     * NOTE: doesn't support table name and flags if called from a db_result
     *
     * @param  mixed $resource SQL Server result identifier or table name
     * @param  int $mode A valid tableInfo mode (DB_TABLEINFO_ORDERTABLE or
     *                   DB_TABLEINFO_ORDER)
     *
     * @return array An array with all the information
     */

    function tableInfo($result, $mode = null)
    {

        $count = 0;
        $id    = 0;
        $res   = array();

        /*
         * depending on $mode, metadata returns the following values:
         *
         * - mode is false (default):
         * $result[]:
         *   [0]["table"]  table name
         *   [0]["name"]   field name
         *   [0]["type"]   field type
         *   [0]["len"]    field length
         *   [0]["flags"]  field flags
         *
         * - mode is DB_TABLEINFO_ORDER
         * $result[]:
         *   ["num_fields"] number of metadata records
         *   [0]["table"]  table name
         *   [0]["name"]   field name
         *   [0]["type"]   field type
         *   [0]["len"]    field length
         *   [0]["flags"]  field flags
         *   ["order"][field name]  index of field named "field name"
         *   The last one is used, if you have a field name, but no index.
         *   Test:  if (isset($result['meta']['myfield'])) { ...
         *
         * - mode is DB_TABLEINFO_ORDERTABLE
         *    the same as above. but additionally
         *   ["ordertable"][table name][field name] index of field
         *      named "field name"
         *
         *      this is, because if you have fields from different
         *      tables with the same field name * they override each
         *      other with DB_TABLEINFO_ORDER
         *
         *      you can combine DB_TABLEINFO_ORDER and
         *      DB_TABLEINFO_ORDERTABLE with DB_TABLEINFO_ORDER |
         *      DB_TABLEINFO_ORDERTABLE * or with DB_TABLEINFO_FULL
         */

        // if $result is a string, then we want information about a
        // table without a resultset

        if (is_string($result)) {
            $id = mssql_query("SELECT * FROM $result", $this->connection);
            if (empty($id)) {
                return $this->mssqlRaiseError();
            }
        } else { // else we want information about a resultset
            $id = $result;
            if (empty($id)) {
                return $this->mssqlRaiseError();
            }
        }

        $count = @mssql_num_fields($id);

        // made this IF due to performance (one if is faster than $count if's)
        if (empty($mode)) {

            for ($i=0; $i<$count; $i++) {
                $res[$i]['table'] = (is_string($result)) ? $result : '';
                $res[$i]['name']  = @mssql_field_name($id, $i);
                $res[$i]['type']  = @mssql_field_type($id, $i);
                $res[$i]['len']   = @mssql_field_length($id, $i);
                $res[$i]['flags'] = '';
            }

        } else { // full
            $res['num_fields']= $count;

            for ($i=0; $i<$count; $i++) {
                $res[$i]['table'] = (is_string($result)) ? $result : '';
                $res[$i]['name']  = @mssql_field_name($id, $i);
                $res[$i]['type']  = @mssql_field_type($id, $i);
                $res[$i]['len']   = @mssql_field_length($id, $i);
                $res[$i]['flags'] = '';
                if ($mode & DB_TABLEINFO_ORDER) {
                    $res['order'][$res[$i]['name']] = $i;
                }
                if ($mode & DB_TABLEINFO_ORDERTABLE) {
                    $res['ordertable'][$res[$i]['table']][$res[$i]['name']] = $i;
                }
            }
        }

        // free the result only if we were called on a table
        if (is_string($result)) {
            @mssql_free_result($id);
        }
        return $res;
    }

    // {{{ getSpecialQuery()

    /**
    * Returns the query needed to get some backend info
    * @param string $type What kind of info you want to retrieve
    * @return string The SQL query string
    */
    function getSpecialQuery($type)
    {
        switch ($type) {
            case 'tables':
                $sql = "select name from sysobjects where type = 'U' order by name";
                break;
            case 'views':
                $sql = "select name from sysobjects where type = 'V'";
                break;
            default:
                return null;
        }
        return $sql;
    }

    // }}}

}
?>