fbsql.php

apache windows下的一款好

    // }}}
    // {{{ commit()

    function commit()
    {
        fbsql_commit();
    }

    // }}}
    // {{{ rollback()

    function rollback()
    {
        fbsql_rollback();
    }

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

    /**
     * Get the number of columns in a result set.
     *
     * @param $result fbsql result identifier
     *
     * @access public
     *
     * @return int the number of columns per row in $result
     */
    function numCols($result)
    {
        $cols = @fbsql_num_fields($result);

        if (!$cols) {
            return $this->fbsqlRaiseError();
        }

        return $cols;
    }

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

    /**
     * Get the number of rows in a result set.
     *
     * @param $result fbsql result identifier
     *
     * @access public
     *
     * @return int the number of rows in $result
     */
    function numRows($result)
    {
        $rows = @fbsql_num_rows($result);
        if ($rows === null) {
            return $this->fbsqlRaiseError();
        }
        return $rows;
    }

    // }}}
    // {{{ affectedRows()

    /**
     * Gets the number of rows affected by the data manipulation
     * query.  For other queries, this function returns 0.
     *
     * @return number of rows affected by the last query
     */

    function affectedRows()
    {
        if (DB::isManip($this->last_query)) {
            $result = @fbsql_affected_rows($this->connection);
        } else {
            $result = 0;
        }
        return $result;
     }

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

    /**
     * Get the native error code of the last error (if any) that
     * occured on the current connection.
     *
     * @access public
     *
     * @return int native fbsql error code
     */

    function errorNative()
    {
        return fbsql_errno($this->connection);
    }

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

    /**
     * Get the next value in a sequence.  We emulate sequences
     * for fbsql.  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 {
            $result = $this->query("INSERT INTO ${sqn}_seq VALUES(NULL)");
            if ($ondemand && DB::isError($result) &&
                $result->getCode() == DB_ERROR_NOSUCHTABLE) {
                $repeat = 1;
                $result = $this->createSequence($seq_name);
                if (DB::isError($result)) {
                    return $result;
                }
            } else {
                $repeat = 0;
            }
        } while ($repeat);
        if (DB::isError($result)) {
            return $result;
        }
        return fbsql_insert_id($this->connection);
    }

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

    function createSequence($seq_name)
    {
        $sqn = preg_replace('/[^a-z0-9_]/i', '_', $seq_name);
        return $this->query("CREATE TABLE ${sqn}_seq ".
                            '(id INTEGER UNSIGNED AUTO_INCREMENT NOT NULL,'.
                            ' PRIMARY KEY(id))');
    }

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

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

    // }}}
    // {{{ modifyQuery()

    function modifyQuery($query)
    {
        if ($this->options['optimize'] == 'portability') {
            // "DELETE FROM table" gives 0 affected rows in fbsql.
            // This little hack lets you know how many rows were deleted.
            if (preg_match('/^\s*DELETE\s+FROM\s+(\S+)\s*$/i', $query)) {
                $query = preg_replace('/^\s*DELETE\s+FROM\s+(\S+)\s*$/',
                                      'DELETE FROM \1 WHERE 1=1', $query);
            }
        }
        return $query;
    }

    // }}}
    // {{{ fbsqlRaiseError()

    function fbsqlRaiseError($errno = null)
    {
        if ($errno === null) {
            $errno = $this->errorCode(fbsql_errno($this->connection));
        }
        return $this->raiseError($errno, null, null, null,
                        fbsql_error($this->connection));
    }

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

    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)) {
            $id = @fbsql_list_fields($this->dsn['database'],
                                     $result, $this->connection);
            if (empty($id)) {
                return $this->fbsqlRaiseError();
            }
        } else { // else we want information about a resultset
            $id = $result;
            if (empty($id)) {
                return $this->fbsqlRaiseError();
            }
        }

        $count = @fbsql_num_fields($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'] = @fbsql_field_table ($id, $i);
                $res[$i]['name']  = @fbsql_field_name  ($id, $i);
                $res[$i]['type']  = @fbsql_field_type  ($id, $i);
                $res[$i]['len']   = @fbsql_field_len   ($id, $i);
                $res[$i]['flags'] = @fbsql_field_flags ($id, $i);
            }
        } else { // full
            $res["num_fields"]= $count;

            for ($i=0; $i<$count; $i++) {
                $res[$i]['table'] = @fbsql_field_table ($id, $i);
                $res[$i]['name']  = @fbsql_field_name  ($id, $i);
                $res[$i]['type']  = @fbsql_field_type  ($id, $i);
                $res[$i]['len']   = @fbsql_field_len   ($id, $i);
                $res[$i]['flags'] = @fbsql_field_flags ($id, $i);
                if ($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($result)) {
            @fbsql_free_result($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 "table_name" from information_schema.tables';
                break;
            default:
                return null;
        }
        return $sql;
    }

    // }}}
}

// TODO/wishlist:
// longReadlen
// binmode

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