http://www.perlmonks.org?node_id=491512


in reply to Re: Accessing MS-Access memofield via DBI
in thread Accessing MS-Access memofield via DBI

Can I do the binding dynamically depending on the datatype of the field??

I tried
#! /usr/bin/perl

use strict;
use warnings;
use DBI ':sql_types';

my $dbh = DBI->connect('DBI:ODBC:driver=Microsoft Access-Treiber (*.md
+b);dbq=db1.mdb',user,pass);

my $col = 'Testcol';

my $statement = "INSERT INTO table (`$col`) VALUES(?)";

my $coltype = get_type($col,$dbh);
$coltype = 'SQL_'.$coltype;
my $sth = $dbh->prepare($statement);

for(2..1000){
  my $var = <STDIN>;
  chomp $var;
  $sth->bind_param(1,$var,$coltype);
  $sth->execute($var) or die $dbh->errstr();
}

sub get_type{
  my ($name,$dbh)  = @_;
  my ($sthcolinfo) = $dbh->column_info(undef,undef,undef,$name);
  my $hashref = $sthcolinfo->fetchrow_hashref();
  return $hashref->{TYPE_NAME};
}

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But I got the following errormessage:
DBI::st=HASH(0x3e9c2dc)->bind_param(...): attribute parameter 'SQL_INTEGER' is not a hash ref at C:/access.pl line 19

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Re^3: Accessing MS-Access memofield via DBI
by reneeb (Chaplain) on Sep 14, 2005 at 07:27 UTC
    This piece of code works:
    #! /usr/bin/perl

use strict;
use warnings;
use DBI ':sql_types';

my $dbh = DBI->connect('DBI:ODBC:driver=Microsoft Access-Treiber (*.md
+b);dbq=db1.mdb',user,pass);

my $col = 'Testcol';

my $statement = "INSERT INTO table (`$col`) VALUES(?)";

my $coltype = get_type($col,$dbh);
$coltype = 'SQL_'.$coltype;
my $sth = $dbh->prepare($statement);

for(2..1000){
  my $var = <STDIN>;
  chomp $var;
  no strict 'refs';
  $sth->bind_param(1,$var,&{"DBI::$coltype"});
  use strict 'refs';
  $sth->execute($var) or die $dbh->errstr();
}

sub get_type{
  my ($name,$dbh)  = @_;
  my ($sthcolinfo) = $dbh->column_info(undef,undef,undef,$name);
  my $hashref = $sthcolinfo->fetchrow_hashref();
  return $hashref->{TYPE_NAME};
}

    [download]


    But when I split the code in "script" and "module" it does not work.
    I've tried this:
    #! /usr/bin/perl

use strict;
use warnings;
use lib qw(.);
use DbiTest;
use DBI ':sql_types';


my $col = 'Testcol';
DbiTest->new($col);

    [download]


    module:
    package DbiTest;

use strict;
use warnings;
use DBI ':sql_types';

sub new{
  my ($class,$col) = @_;
  my $dbh = DBI->connect('DBI:ODBC:driver=Microsoft Access-Treiber (*.
+mdb);dbq=db1.mdb',user,pass);

  my $statement = "INSERT INTO table (`$col`) VALUES(?)";

  my $coltype = get_type($col,$dbh);
  $coltype = 'SQL_'.$coltype;
  my $sth = $dbh->prepare($statement);

  for(2..1000){
    my $var = <STDIN>;
    chomp $var;
    no strict 'refs';
    $sth->bind_param(1,$var,&{"DBI::$coltype"});
    use strict 'refs';
    $sth->execute($var) or die $dbh->errstr();
  }
}

sub get_type{
  my ($name,$dbh)  = @_;
  my ($sthcolinfo) = $dbh->column_info(undef,undef,undef,$name);
  my $hashref = $sthcolinfo->fetchrow_hashref();
  return $hashref->{TYPE_NAME};
}

1;

    [download]


    With that code the script dies with the following errormessage:
    Usage: SQL_LONGVARCHAR() at DbiTest line 21

    [download]
[reply]
[d/l]
[select]
      The solution is quite simple:
      $sth->bind_param(1,$var,&{"DBI::$coltype"}());

      But the question is why my version (&{"DBI::$coltype"}) runs in a single script and why it doesn't work after splitting into script and module...
[reply]
[d/l]
[select]
        I had the same problem as you and I duplicated your solution, with the same complication. When the insert code is in a different package than the calling routine it didn't work. Must be a namespace issue. If you resolve it please let me know. In the meantime thank you, thank you to everyone in this thread. I was going nuts with this problem.
[reply]

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