Thanks Henri. Much appreciated.
On Mon, 2012-10-22 at 09:21 +0200, Henri Asseily wrote:
> The $sth is a mutable string… Which means you can change it at runtime!
>
> Here's an example of a modified $sth at runtime:
>
> my $up_sql = defined($updated_at) ? 'updated_at < ? AND ' : undef;
> my $sql = "SELECT * FROM mytable WHERE $up_sql type_id = ? AND
> serial_number IN (
> SELECT serial_number FROM anothertable WHERE device_id = ?)";
> my $sth = $dbh->prepare($sql);
> my $i = 1;
> if (defined($up_sql)) {
> $sth->bind_param($i, $updated_at, SQL_INTEGER); $i++;
> }
> $sth->bind_param($i, $pass_type_id, SQL_VARCHAR); $i++;
> $sth->bind_param($i, $device_id, SQL_VARCHAR); $i++;
> $sth->execute;
>
>
>
> On Oct 22, 2012, at 9:16 AM, Tim Bowden <tim.bow...@mapforge.com.au> wrote:
>
> > Is it possible, and if so, how can I set the number of placeholders in a
> > prepared statement at runtime?
> >
> > IE, given something like:
> >
> > my $sth = $dbh->prepare("INSERT INTO $table ($fields) VALUES (?,?,?));
> >
> > which is fine if I know how many fields I'm inserting into, but what if
> > I don't know till runtime how many fields? How can I put the (?,?,?)
> > into a variable and have it recognised as placeholders?
> >
> > Thanks,
> > Tim Bowden
> >
>
