On Apache
Under GNU General Public License
2025-01-02 22:25 @18.191.118.36 CrawledBy Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)
DBIx::ContextualFetch(3pm) User Contributed Perl Documentation DBIx::ContextualFetch(3pm)
NAME
DBIx::ContextualFetch - Add contextual fetches to DBI
SYNOPSIS
my $dbh = DBI->connect(...., { RootClass => "DBIx::ContextualFetch" });
# Modified statement handle methods.
my $rv = $sth->execute;
my $rv = $sth->execute(@bind_values);
my $rv = $sth->execute(\@bind_values, \@bind_cols);
# In addition to the normal DBI sth methods...
my $row_ref = $sth->fetch;
my @row = $sth->fetch;
my $row_ref = $sth->fetch_hash;
my %row = $sth->fetch_hash;
my $rows_ref = $sth->fetchall;
my @rows = $sth->fetchall;
my $rows_ref = $sth->fetchall_hash;
my @tbl = $sth->fetchall_hash;
DESCRIPTION
It always struck me odd that DBI didn't take much advantage of Perl's context sensitivity.
DBIx::ContextualFetch redefines some of the various fetch methods to fix this oversight.
It also adds a few new methods for convenience (though not necessarily efficiency).
SET-UP
my $dbh = DBIx::ContextualFetch->connect(@info);
my $dbh = DBI->connect(@info, { RootClass => "DBIx::ContextualFetch" });
To use this method, you can either make sure that everywhere you normall call
DBI->connect() you either call it on DBIx::ContextualFetch, or that you pass this as your
RootClass. After this DBI will Do The Right Thing and pass all its calls through us.
EXTENSIONS
execute
$rv = $sth->execute;
$rv = $sth->execute(@bind_values);
$rv = $sth->execute(\@bind_values, \@bind_cols);
execute() is enhanced slightly:
If called with no arguments, or with a simple list, execute() operates normally. When
when called with two array references, it performs the functions of bind_param, execute
and bind_columns similar to the following:
$sth->execute(@bind_values);
$sth->bind_columns(undef, @bind_cols);
In addition, execute will accept tainted @bind_values. I can't think of what a malicious
user could do with a tainted bind value (in the general case. Your application may vary.)
Thus a typical idiom would be:
$sth->execute([$this, $that], [\($foo, $bar)]);
Of course, this method provides no way of passing bind attributes through to bind_param or
bind_columns. If that is necessary, then you must perform the bind_param, execute,
bind_col sequence yourself.
fetch
$row_ref = $sth->fetch;
@row = $sth->fetch;
A context sensitive version of fetch(). When in scalar context, it will act as
fetchrow_arrayref. In list context it will use fetchrow_array.
fetch_hash
$row_ref = $sth->fetch_hash;
%row = $sth->fetch_hash;
A modification on fetchrow_hashref. When in scalar context, it acts just as
fetchrow_hashref() does. In list context it returns the complete hash.
fetchall
$rows_ref = $sth->fetchall;
@rows = $sth->fetchall;
A modification on fetchall_arrayref. In scalar context it acts as fetchall_arrayref. In
list it returns an array of references to rows fetched.
fetchall_hash
$rows_ref = $sth->fetchall_hash;
@rows = $sth->fetchall_hash;
A mating of fetchall_arrayref() with fetchrow_hashref(). It gets all rows from the hash,
each as hash references. In scalar context it returns a reference to an array of hash
references. In list context it returns a list of hash references.
ORIGINAL AUTHOR
Michael G Schwern as part of Ima::DBI
CURRENT MAINTAINER
Tony Bowden <tony AT tmtm.com>
LICENSE
This library is free software; you can redistribute it and/or modify it under the same
terms as Perl itself.
SEE ALSO
DBI. Ima::DBI. Class::DBI.
perl v5.32.0 2020-12-28 DBIx::ContextualFetch(3pm)
Generated by $Id: phpMan.php,v 4.55 2007/09/05 04:42:51 chedong Exp $ Author: Che Dong
On Apache
Under GNU General Public License
2025-01-02 22:25 @18.191.118.36 CrawledBy Mozilla/5.0 AppleWebKit/537.36 (KHTML, like Gecko; compatible; ClaudeBot/1.0; +claudebot@anthropic.com)