Has any one else encountered problems when nesting mySQL select statements using the DBI module?

I know full well that it's possible to do something like this...(because I have and I use it)

    my $sql = qq{ SELECT * FROM slname};
    $qry = $dbhutils->prepare($sql);
    $qry->execute();
    my $slnameHTML = "";

    while (@row = $qry->fetchrow_array){
        $slname = $row[0];
        $slID = $row[1];
        $slnameHTML = $slnameHTML . "<option value=\"$slID\">$slname<\
+/option>\n";        
    }
    $qry->finish();

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However if I do a similier kind of while loop but this time I use one of the pieces of data to perform another SELECT query, the DBI module whinges at me with the following error..

DBD::mysql::st fetchrow_array failed: fetch() without execute() at....

[download]

Here's the code and it appears to be quite straight forward...?

my $sql = qq{ SELECT * FROM titles ORDER BY slID, countryID, languageI
+D, title};
$qry = $dbh->prepare($sql);
$qry->execute();

while(@row = $qry->fetchrow_array){
    print $cgi->h2("Hello!!!");
    my $countryID = $row[0];
    my $languageID = $row[1];
    my $slID = $row[2];
    my $title = $row[3];

    my $countryname = &getCountryNameFromID($countryID);

    print $cgi->p("$slID");
    print $cgi->p("$countryname");
    print $cgi->p("$languageID");
    print $cgi->p("$title");
    print $cgi->p("");
}
$qry->finish();

[download]

The "&getCountryNameFromID" performs a simple SELECT query and uses and entirely different db handle altogether (same db, different Perl script included using a require)


# Takes the countryID as a parameter e.g. "12"
sub getCountryNameFromID{
    my $countryID = $_[0];
    my $sql = qq{ SELECT fullcountryname FROM countries WHERE (country
+ID="$countryID") };
    $qry = $dbhutils->prepare($sql);
    $qry->execute();
    @row = $qry->fetchrow_array;    
    my $countryname = $row[0];
    $qry->finish();
    return $countryname;
}

[download]

Bizzare?? Unexpected?? Any ideas anyone??

M

Note: the first time it goes through the loop it does the 5 "print $cgi->p(..." statements

In reply to Nesting SELECT statements by heezy

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