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Manual Reference Pages  -  RESOURCEPOOL::COMMAND::DBI::SELECT (3)

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NAME

ResourcePool::Command::DBI::Select - A DBI command to exexcute select statements.

CONTENTS

SYNOPSIS



 use ResourcePool::Command::DBI::Select;

 # simple usage
 my $cmd = ResourcePool::Command::DBI::Select->new();
 eval {
        my $sth = $pool->execute($cmd
                , select id, name, value from test where id > ?
                , 5
        );
        while ($sth->fetch()) {
        }
        $sth->finish(); # dont forget!!
 };



DESCRIPTION

This command can be used to execute select statements in a DBI database using the ResourcePool command execution environment.

In order to understand this Class, and more importantly this document, you need to know a few terms I use in this document, if you are new to this class you should read the TERMS sections first.

Before using this class, look if one of the similar classes like SelectRow can help you. For some databases/driver it is possible that the use of this class is not safe, becaus it makes it possible to open more than one cursor with one database handle. You have also to finish the DBI statementhandle yourself.

There will be more advanced specaliced Commands available to select from a database.

    ResourcePool::Command::DBI::Select->new

Instantiates a new Select object. The parameters are (nearly) identical to those of the Execute method, the only difference is that it make no sense to specify output parameters (max_len).

CW$pool->execute

Similar to the same named method of the Execute() class. The only difference is that it returns a DBI sth (statement handle) which can be used to retreive the data. You have to finish this sth manually when done.

TODO

Documentation Year, we really need documentation.

SEE ALSO

DBI, ResourcePool, ResourcePool::Factory

AUTHOR



    Copyright (C) 2001-2004 by Markus Winand <mws@fatalmind.com>

    This program is free software; you can redistribute it and/or
    modify it under the same terms as Perl itself.



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perl v5.20.3 RESOURCEPOOL::COMMAND::DBI::SELECT (3) 2004-05-02

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