I was just writing a bug off in DBD::ODBC when I needed to check the ParamTypes documentation and discovered it had a mistake:

  # assuming $sth1 is a previously prepared statement handle
  my $sth2 = $dbh->prepare( $sth1->{Statement} );
  my $ParamValues = $sth1->{ParamValues} || {};
  my $ParamTypes  = $sth1->{ParamTypes}  || {};
  $sth2->bind_param($_, $PV->{$_} $PT->{$_})
    for keys %{ %$PV, %$PT };
  $sth2->execute();

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which should I guessed was just a typo and should be

  # assuming $sth1 is a previously prepared statement handle
  my $sth2 = $dbh->prepare( $sth1->{Statement} );
  my $ParamValues = $sth1->{ParamValues} || {};
  my $ParamTypes  = $sth1->{ParamTypes}  || {};
  $sth2->bind_param($_, $ParamValues->{$_} $ParamTypes->{$_})
    for keys %{ %$ParamValues, %$ParamTypes };
  $sth2->execute();

[download]

Before I committed the fix to DBI pod I thought I'd better check it out so I wrote:

use strict;
use Data::Dumper;
use DBI;
my $h = DBI->connect;
my $s =
$h->prepare(q/insert into mje values(?)/);
$s->bind_param(1, 2);
$s->execute;

my $ParamValues = $s->{ParamValues} || {};
my $ParamTypes  = $s->{ParamTypes}  || {};

print Dumper($ParamValues);
print Dumper($ParamTypes);

my $s2 = $h->prepare(q/insert into mje2 values(?)/);
$s2->bind_param($_, $ParamValues->{$_}, $ParamTypes->{$_})
    for keys %{ %$ParamValues, %$ParamTypes };

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and it fails with "Can't use string ("1/8") as a HASH ref while "strict refs" in use at /tmp/z.pl line 18.". I've no idea why - any ideas?

The output which will make it easier to reproduce without DBI is:

$VAR1 = {
          '1' => 2
        };
$VAR1 = {
          '1' => {
                   'TYPE' => 4
                 }
        };
Can't use string ("1/8") as a HASH ref while "strict refs" in use at /
+tmp/z.pl line 18.

[download]
UPDATE: posted wrong code at first - sorry.

In reply to Problem with hash dereferencing from DBI example by mje

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