Honourable Monks,

For security reasons I'm trying to convince colleagues to start using placeholders in SQL prepared statements instead of using variable interpolation ( I don't want to discuss this further)

Now I'm getting the requirement to be able to show and log the resulting SQL statement of an ->execute() .

The motivation is to facilitate a cut&paste into an SQL GUI in case of problems.

There are multiple workarounds I could think of to mimic the process of ->bind_param() , but is there a proper way to use DBI.pm to get the analogous query after ->execute() ?

for instance this

my $statement = <<'__SQL__';
SELECT *
   FROM t_user_portal
   WHERE f_client = ?
__SQL__

my $sth = $dbh->prepare($statement)
     or die $dbh->errstr;

my $client='lanx';

my $rv = $sth->execute($client)
     or die $sth->errstr;
[download]

showing

SELECT *
   FROM t_user_portal
   WHERE f_client = 'lanx'
[download]

in case of problems?

I'm aware that MySql doesn't compose the query with placeholders by concatenating strings, it's rather something like:

PREPARE stmt1 FROM 'SELECT * FROM t_user_portal WHERE f_client = ?';
SET @client = 'lanx';
EXECUTE stmt1 USING @client;
[download]

which is still a acceptable for debugging (and easily constructable as a workaround).

So my question is:

Does DBI.pm show any resulting SQL-code from ->bind_param() or do I need to reconstruct the last code by myself after an error occurred?

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