ActiveState!

ActivePerl Documentation
Table of Contents

(Usage Statistics)
(about this ver)


* Getting Started
    * Welcome To ActivePerl
    * Release Notes
    * Readme
    * ActivePerl Change Log
* Install Notes
    * Linux
    * Solaris
    * Windows
* ActivePerl Components
    * Overview
    * PPM
    * Windows Specifics
       * OLE Browser
       * PerlScript
       * Perl for ISAPI
       * PerlEZ
* ActivePerl FAQ
    * Introduction
    * Availability & Install
    * Using PPM
    * Docs & Support
    * Windows Specifics
       * Perl for ISAPI
       * Windows 9X/NT/2000
       * Quirks
       * Web Server Config
       * Web programming
       * Programming
       * Modules & Samples
       * Embedding & Extending
       * Using OLE with Perl
* Windows Scripting
    * Active Server Pages
    * Windows Script Host
    * Windows Script Components

Core Perl Documentation


* perl
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* perldiag
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Pragmas


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* utf8
* vars
* warnings

Libraries


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* XSLoader

 DBI::Format - A package for displaying result tables


NAME

DBI::Format - A package for displaying result tables


SUPPORTED PLATFORMS

  • Linux
  • Solaris
  • Windows
This module is not included with the standard ActivePerl distribution. It is available as a separate download using PPM.

SYNOPSIS

  # create a new result object
  $r = DBI::Format->new('var1' => 'val1', ...);
  # Prepare it for output by creating a header
  $r->header($sth, $fh);
  # In a loop, display rows
  while ($ref = $sth->fetchrow_arrayref()) {
    $r->row($ref);
  }
  # Finally create a trailer
  $r->trailer();


DESCRIPTION

THIS PACKAGE IS STILL VERY EXPERIMENTAL. THINGS WILL CHANGE.

This package is used for making the output of DBI::Shell configurable. The idea is to derive a subclass for any kind of output table you might create. Examples are

  • a very simple output format as offered by DBI::neat_list(). AVAILABLE SUBCLASSES.

  • a box format, as offered by the Data::ShowTable module.

  • HTML format, as used in CGI binaries

  • postscript, to be piped into lpr or something similar

In the future the package should also support interactive methods, for example tab completion.

These are the available methods:

new(@attr)
new(\%attr)
(Class method) This is the constructor. You'd rather call a subclass constructor. The construcor is accepting either a list of key/value pairs or a hash ref.

header($sth, $fh)
(Instance method) This is called when a new result table should be created to display the results of the statement handle $sth. The (optional) argument $fh is an IO handle (or any object supporting a print method), usually you use an IO::Wrap object for STDIN.

The method will query the $sth for its NAME, NUM_OF_FIELDS, TYPE, SCALE and PRECISION attributes and typically print a header. In general you should not assume that $sth is indeed a DBI statement handle and better treat it as a hash ref with the above attributes.

row($ref)
(Instance method) Prints the contents of the array ref $ref. Usually you obtain this array ref by calling $sth->fetchrow_arrayref().

trailer
(Instance method) Once you have passed all result rows to the result package, you should call the trailer method. This method can, for example print the number of result rows.


AVAILABLE SUBCLASSES

First of all, you can use the DBI::Format package itself: It's not an abstract base class, but a very simple default using DBI::neat_list().

Ascii boxes

This subclass is using the Box mode of the Data::ShowTable module internally. the Data::ShowTable(3) manpage.


AUTHOR AND COPYRIGHT

This module is Copyright (c) 1997, 1998

    Jochen Wiedmann
    Am Eisteich 9
    72555 Metzingen
    Germany
    Email: joe@ispsoft.de
    Phone: +49 7123 14887

The DBD::Proxy module is free software; you can redistribute it and/or modify it under the same terms as Perl itself.


SEE ALSO

the DBI::Shell(3) manpage, DBI(3), dbish(1)

 DBI::Format - A package for displaying result tables