msql.php

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    // {{{ affected()

    /**
     * Determines the number of rows affected by a data maniuplation query
     *
     * 0 is returned for queries that don't manipulate data.
     *
     * @return int  the number of rows.  A DB_Error object on failure.
     */
    function affectedRows()
    {
        if (!$this->_result) {
            return 0;
        }
        return msql_affected_rows($this->_result);
    }

    // }}}
    // {{{ nextId()

    /**
     * Returns the next free id in a sequence
     *
     * @param string  $seq_name  name of the sequence
     * @param boolean $ondemand  when true, the seqence is automatically
     *                            created if it does not exist
     *
     * @return int  the next id number in the sequence.
     *               A DB_Error object on failure.
     *
     * @see DB_common::nextID(), DB_common::getSequenceName(),
     *      DB_msql::createSequence(), DB_msql::dropSequence()
     */
    function nextId($seq_name, $ondemand = true)
    {
        $seqname = $this->getSequenceName($seq_name);
        $repeat = false;
        do {
            $this->pushErrorHandling(PEAR_ERROR_RETURN);
            $result =& $this->query("SELECT _seq FROM ${seqname}");
            $this->popErrorHandling();
            if ($ondemand && DB::isError($result) &&
                $result->getCode() == DB_ERROR_NOSUCHTABLE) {
                $repeat = true;
                $this->pushErrorHandling(PEAR_ERROR_RETURN);
                $result = $this->createSequence($seq_name);
                $this->popErrorHandling();
                if (DB::isError($result)) {
                    return $this->raiseError($result);
                }
            } else {
                $repeat = false;
            }
        } while ($repeat);
        if (DB::isError($result)) {
            return $this->raiseError($result);
        }
        $arr = $result->fetchRow(DB_FETCHMODE_ORDERED);
        $result->free();
        return $arr[0];
    }

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

    /**
     * Creates a new sequence
     *
     * Also creates a new table to associate the sequence with.  Uses
     * a separate table to ensure portability with other drivers.
     *
     * @param string $seq_name  name of the new sequence
     *
     * @return int  DB_OK on success.  A DB_Error object on failure.
     *
     * @see DB_common::createSequence(), DB_common::getSequenceName(),
     *      DB_msql::nextID(), DB_msql::dropSequence()
     */
    function createSequence($seq_name)
    {
        $seqname = $this->getSequenceName($seq_name);
        $res = $this->query('CREATE TABLE ' . $seqname
                            . ' (id INTEGER NOT NULL)');
        if (DB::isError($res)) {
            return $res;
        }
        $res = $this->query("CREATE SEQUENCE ON ${seqname}");
        return $res;
    }

    // }}}
    // {{{ dropSequence()

    /**
     * Deletes a sequence
     *
     * @param string $seq_name  name of the sequence to be deleted
     *
     * @return int  DB_OK on success.  A DB_Error object on failure.
     *
     * @see DB_common::dropSequence(), DB_common::getSequenceName(),
     *      DB_msql::nextID(), DB_msql::createSequence()
     */
    function dropSequence($seq_name)
    {
        return $this->query('DROP TABLE ' . $this->getSequenceName($seq_name));
    }

    // }}}
    // {{{ quoteIdentifier()

    /**
     * mSQL does not support delimited identifiers
     *
     * @param string $str  the identifier name to be quoted
     *
     * @return object  a DB_Error object
     *
     * @see DB_common::quoteIdentifier()
     * @since Method available since Release 1.7.0
     */
    function quoteIdentifier($str)
    {
        return $this->raiseError(DB_ERROR_UNSUPPORTED);
    }

    // }}}
    // {{{ escapeSimple()

    /**
     * Escapes a string according to the current DBMS's standards
     *
     * @param string $str  the string to be escaped
     *
     * @return string  the escaped string
     *
     * @see DB_common::quoteSmart()
     * @since Method available since Release 1.7.0
     */
    function escapeSimple($str)
    {
        return addslashes($str);
    }

    // }}}
    // {{{ msqlRaiseError()

    /**
     * Produces a DB_Error object regarding the current problem
     *
     * @param int $errno  if the error is being manually raised pass a
     *                     DB_ERROR* constant here.  If this isn't passed
     *                     the error information gathered from the DBMS.
     *
     * @return object  the DB_Error object
     *
     * @see DB_common::raiseError(),
     *      DB_msql::errorNative(), DB_msql::errorCode()
     */
    function msqlRaiseError($errno = null)
    {
        $native = $this->errorNative();
        if ($errno === null) {
            $errno = $this->errorCode($native);
        }
        return $this->raiseError($errno, null, null, null, $native);
    }

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

    /**
     * Gets the DBMS' native error message produced by the last query
     *
     * @return string  the DBMS' error message
     */
    function errorNative()
    {
        return @msql_error();
    }

    // }}}
    // {{{ errorCode()

    /**
     * Determines PEAR::DB error code from the database's text error message
     *
     * @param string $errormsg  the error message returned from the database
     *
     * @return integer  the error number from a DB_ERROR* constant
     */
    function errorCode($errormsg)
    {
        static $error_regexps;
        if (!isset($error_regexps)) {
            $error_regexps = array(
                '/^Access to database denied/i'
                    => DB_ERROR_ACCESS_VIOLATION,
                '/^Bad index name/i'
                    => DB_ERROR_ALREADY_EXISTS,
                '/^Bad order field/i'
                    => DB_ERROR_SYNTAX,
                '/^Bad type for comparison/i'
                    => DB_ERROR_SYNTAX,
                '/^Can\'t perform LIKE on/i'
                    => DB_ERROR_SYNTAX,
                '/^Can\'t use TEXT fields in LIKE comparison/i'
                    => DB_ERROR_SYNTAX,
                '/^Couldn\'t create temporary table/i'
                    => DB_ERROR_CANNOT_CREATE,
                '/^Error creating table file/i'
                    => DB_ERROR_CANNOT_CREATE,
                '/^Field .* cannot be null$/i'
                    => DB_ERROR_CONSTRAINT_NOT_NULL,
                '/^Index (field|condition) .* cannot be null$/i'
                    => DB_ERROR_SYNTAX,
                '/^Invalid date format/i'
                    => DB_ERROR_INVALID_DATE,
                '/^Invalid time format/i'
                    => DB_ERROR_INVALID,
                '/^Literal value for .* is wrong type$/i'
                    => DB_ERROR_INVALID_NUMBER,
                '/^No Database Selected/i'
                    => DB_ERROR_NODBSELECTED,
                '/^No value specified for field/i'
                    => DB_ERROR_VALUE_COUNT_ON_ROW,
                '/^Non unique value for unique index/i'
                    => DB_ERROR_CONSTRAINT,
                '/^Out of memory for temporary table/i'
                    => DB_ERROR_CANNOT_CREATE,
                '/^Permission denied/i'
                    => DB_ERROR_ACCESS_VIOLATION,
                '/^Reference to un-selected table/i'
                    => DB_ERROR_SYNTAX,
                '/^syntax error/i'
                    => DB_ERROR_SYNTAX,
                '/^Table .* exists$/i'
                    => DB_ERROR_ALREADY_EXISTS,
                '/^Unknown database/i'
                    => DB_ERROR_NOSUCHDB,
                '/^Unknown field/i'
                    => DB_ERROR_NOSUCHFIELD,
                '/^Unknown (index|system variable)/i'
                    => DB_ERROR_NOT_FOUND,
                '/^Unknown table/i'
                    => DB_ERROR_NOSUCHTABLE,
                '/^Unqualified field/i'
                    => DB_ERROR_SYNTAX,
            );
        }

        foreach ($error_regexps as $regexp => $code) {
            if (preg_match($regexp, $errormsg)) {
                return $code;
            }
        }
        return DB_ERROR;
    }

    // }}}
    // {{{ tableInfo()

    /**
     * Returns information about a table or a result set
     *
     * @param object|string  $result  DB_result object from a query or a
     *                                 string containing the name of a table.
     *                                 While this also accepts a query result
     *                                 resource identifier, this behavior is
     *                                 deprecated.
     * @param int            $mode    a valid tableInfo mode
     *
     * @return array  an associative array with the information requested.
     *                 A DB_Error object on failure.
     *
     * @see DB_common::setOption()
     */
    function tableInfo($result, $mode = null)
    {
        if (is_string($result)) {
            /*
             * Probably received a table name.
             * Create a result resource identifier.
             */
            $id = @msql_query("SELECT * FROM $result",
                              $this->connection);
            $got_string = true;
        } elseif (isset($result->result)) {
            /*
             * Probably received a result object.
             * Extract the result resource identifier.
             */
            $id = $result->result;
            $got_string = false;
        } else {
            /*
             * Probably received a result resource identifier.
             * Copy it.
             * Deprecated.  Here for compatibility only.
             */
            $id = $result;
            $got_string = false;
        }

        if (!is_resource($id)) {
            return $this->raiseError(DB_ERROR_NEED_MORE_DATA);
        }

        if ($this->options['portability'] & DB_PORTABILITY_LOWERCASE) {
            $case_func = 'strtolower';
        } else {
            $case_func = 'strval';
        }

        $count = @msql_num_fields($id);
        $res   = array();

        if ($mode) {
            $res['num_fields'] = $count;
        }

        for ($i = 0; $i < $count; $i++) {
            $tmp = @msql_fetch_field($id);

            $flags = '';
            if ($tmp->not_null) {
                $flags .= 'not_null ';
            }
            if ($tmp->unique) {
                $flags .= 'unique_key ';
            }
            $flags = trim($flags);

            $res[$i] = array(
                'table' => $case_func($tmp->table),
                'name'  => $case_func($tmp->name),
                'type'  => $tmp->type,
                'len'   => msql_field_len($id, $i),
                'flags' => $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 ($got_string) {
            @msql_free_result($id);
        }
        return $res;
    }

    // }}}
    // {{{ getSpecialQuery()

    /**
     * Obtain a list of a given type of objects
     *
     * @param string $type  the kind of objects you want to retrieve
     *
     * @return array  the array containing the list of objects requested
     *
     * @access protected
     * @see DB_common::getListOf()
     */
    function getSpecialQuery($type)
    {
        switch ($type) {
            case 'databases':
                $id = @msql_list_dbs($this->connection);
                break;
            case 'tables':
                $id = @msql_list_tables($this->dsn['database'],
                                        $this->connection);
                break;
            default:
                return null;
        }
        if (!$id) {
            return $this->msqlRaiseError();
        }
        $out = array();
        while ($row = @msql_fetch_row($id)) {
            $out[] = $row[0];
        }
        return $out;
    }

    // }}}

}

/*
 * Local variables:
 * tab-width: 4
 * c-basic-offset: 4
 * End:
 */

?>