06-12-2009
Can't call method "prepare" on an undefined value at...
I am getting the error "Can't call method "prepare" on an undefined value at..." with the following code:
<code>my %dbh;
my $dbh = DBI->connect("DBI:mysql:Customer_Data",
$username,
$password
) or die "Database connection failed.";
$myquery="SELECT * from Site";
$execute = $connect->prepare($myquery);
$execute->execute() or die $dbh->errstr;
</code>
Can anyone suggest what might be the problem?
Last edited by vincaStar; 06-12-2009 at 07:09 PM..
10 More Discussions You Might Find Interesting
1. Shell Programming and Scripting
We ran into an issue trying to install DBI and DB2 modules for perl for AIX from the link
http://www-306.ibm.com/software/data/db2/perl/
We tried to install the DBI module using
bash# perl -MCPAN -e 'install DBI'
command. However we ended up with the following error.
Stop.
... (3 Replies)
Discussion started by: jerardfjay
3 Replies
2. Programming
hi i am trying to connect to an oracle database using dbi and i get this ::
Driver has not implemented the disconnect_all method. at /opt/perl/lib/site_perl/5.8.0/sun4-solaris/DBI.pm line 575
END failed--call queue aborted.
for all i know, the script was working earlier, but has... (1 Reply)
Discussion started by: poggendroff
1 Replies
3. Shell Programming and Scripting
Hi, i have some queries on installing the Perl DBI and the DBD Oracle.
I know that i have to install the DBI first. I have the source files in a folder in my home directory.The commands to install arecd /home/DBI
Perl Makefile.PL
make
make installI would like to know, after executing these... (4 Replies)
Discussion started by: new2ss
4 Replies
4. Shell Programming and Scripting
Hi,
I want to connect perl with the mysql to select and so on but the connection don't work
code
#!/usr/bin/perl
BEGIN {
# PERL MODULES WE WILL BE USING
use DBI;
$dbh = DBI->connect('DBI:mysql:C:\Program Files\MySQL\MySQL Server 5.0\data\db1','','pass') or die $DBI::errstr;}
#... (1 Reply)
Discussion started by: eng_shimaa
1 Replies
5. Solaris
how dow you complie perl module DBI with mysql from /usr/local/mysql/bin
keeps going to mysql client for /usr/sfw/bin
is it the LD_PATH ???...:confused:
error is
# perl login.cgi
DBI connect('customers;mysql_socket=/tmp/mysql.sock:localhost','root',...) failed: Client does not... (1 Reply)
Discussion started by: photon
1 Replies
6. UNIX for Advanced & Expert Users
i've been struggling with installing the Perl DBI & DBD modules all weekend, and I'm getting close, but no cigar as of yet. When I run the perl script db.pl I get the following mismatch error:
Mon Apr 19 09:43:29 EDT 2010
/Library/Perl/DBD-mysql-4.011 ->
peterv@MBP17.local<515>$: db.pl | tee... (0 Replies)
Discussion started by: peterv6
0 Replies
7. Shell Programming and Scripting
Hi there, I have a bit of code similar to below (which ive actually got from perldoc, but mine is similar enough)
$sth = $dbh->prepare(q{ SELECT region, sales FROM sales_by_region });
$sth->execute;
my ($region, $sales);
# Bind Perl variables to columns:
$rv =... (4 Replies)
Discussion started by: hcclnoodles
4 Replies
8. Shell Programming and Scripting
Hi All,
I installed DBI module in a non INC location and using it in my script via "use lib".
But it throw the below error at the "use DBI" step.
Please help
Usage: DBI::_install_method(dbi_class, meth_name, file, attribs=Nullsv) at /xx/xxx/xxxxx/xxxxx/oracle/lib/DBI.pm/oracle/lib/DBI.pm line... (2 Replies)
Discussion started by: prasperl
2 Replies
9. Shell Programming and Scripting
I am trying to write a script for my own use that will allow me to connect to network devices, then run a set of commands.
I start with a list of ips in a text file. Each ip is on its own line.
I start with a second file of commands. Each command on one line.
for illustration .. the cmd.txt... (2 Replies)
Discussion started by: popeye
2 Replies
10. Shell Programming and Scripting
Experts,
I've been struggling with making a Perl Oracle DBI script to work through my Apache webserver.
Mysql DBI scripts work fine, but I'm having issue's with Oracle.
The oracle script works on command line, but I'm getting an
"Internal Server Error" with apache
Sourcing the oracle... (0 Replies)
Discussion started by: timj123
0 Replies
LEARN ABOUT DEBIAN
dbix::simple::comparison
DBIx::Simple::Comparison(3pm) User Contributed Perl Documentation DBIx::Simple::Comparison(3pm)
NAME
DBIx::Simple::Comparison - DBIx::Simple in DBI jargon
DESCRIPTION
This is just a simple and inaccurate overview of what DBI things the DBIx::Simple things represent, or the other way around.
This document can be useful to find the foo equivalent of bar.
"?" means that DBI doesn't have an equivalent or that I couldn't find one.
"=" means that DBIx::Simple provides a direct wrapper to the DBI function.
"~" means that DBIx::Simple's method does more or less the same, but usually in a more high level way: context sensitive, combining things,
automatically taking care of something.
Note that DBIx::Simple is a wrapper around DBI. It is not "better" than DBI. In fact, DBIx::Simple cannot work without DBI.
Using DBI directly is always faster than using DBIx::Simple's equivalents. (For the computer, that is. For you, DBIx::Simple is supposed to
be faster.)
Classes, common names
use DBI ~ use DBIx::Simple
$DBI::errstr = DBIx::Simple->error
DBI::db ~ DBIx::Simple
$dbh ~ $db
$dbh->errstr = $db->error
connect ~ connect
connect ~ new
DBI::st ~ DBIx::Simple::Result
<undef> ~ DBIx::Simple::Dummy
$sth ~ $result
Queries
DBI
my $sth = $dbh->prepare_cached($query);
$sth->execute(@values);
~ DBIx::Simple
my $result = $db->query($query, $values);
Results
DBI DBIx::Simple
bind_columns ~ bind
fetchrow_arrayref/fetch = fetch
fetchrow_array ~ list
*1 ~ flat
[@{fetchrow_arrayref}] = array
fetchall_arrayref ~ arrays
fetchrow_hashref() *2*3 = hash
fetchall_arrayref({}) *4 ~ hashes
fetchall_hashref *2 = map_hashes
? ? map_arrays
fetchall_hashref(1) *2 = map
$sth->{NAME_lc/NAME} = $result->columns
*1 There's no fetch variant, but you can do "{ @{ $dbh->selectcol_arrayref('SELECT ...', { Slice => [] }) } }".
*2 To receive the keys (column names) lowercased, use "$db->{FetchHashKeyName} = 'NAME_lc'". DBIx::Simple lower cases them by default.
*3 Or supply an argument, 'NAME_lc'.
*4 No, arrayref isn't a typo. When supplied an empty hash reference, DBI's fetchall_arrayref actually returns hashrefs. This DBI method
does not support lower casing of keys, DBIx::Simple does.
Direct access
DBI DBIx::Simple
$dbh = $db->dbh
$sth->{$foo} = $result->attr($foo)
func = func
begin_work = begin_work
commit = commit
rollback = rollback
last_insert_id = last_insert_id
rows = rows
disconnect ~ disconnect
finish ~ finish
DBIx::Simple specific (?)
keep_statements
lc_columns
iquery (via SQL::Interp)
select, insert, update, delete (via SQL::Abstract)
abstract (via SQL::Abstract)
flat
hashes
map_arrays
map
LICENSE
There is no license. This software was released into the public domain. Do with it what you want, but on your own risk. The author
disclaims any responsibility.
AUTHOR
Juerd Waalboer <juerd@cpan.org> <http://juerd.nl/>
SEE ALSO
DBI, DBIx::Simple
perl v5.10.0 2007-07-14 DBIx::Simple::Comparison(3pm)