I have the following code in a subroutine:

my $insert_query = "INSERT INTO $table VALUES ( $layout )";
my $sth = $dbh->prepare($insert_query) or die $DBI::errstr;
$sth->execute(@values) or die $DBI::errstr;

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The name of the table, the layout and the values are passed in, with the layout containing some constants and some placeholders. One such layout parameter looks like this:"DEFAULT, ?, ?, DEFAULT, DEFAULT". This means that there are lots of places where things can go wrong. And wrong something is certainly going. What I would really like to know is what SQL statement actually gets invoked, for example INSERT INTO data VALUES ( DEFAULT, 1, 2, DEFAULT, DEFAULT ). I've tried googling and going through the DBI documentation, but haven't found any means of getting this printed. Can this be done, and if so, how?

Regards,

John Davies

In reply to Debugging DBI placeholders by davies

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