Hi, I've posted this also on comp.lang.perl.tk, but am also asking here, because I'm guessing this is more of a Perl problem than Tk.

Anyways, what I need to do is test my sql statement in a prepare statement, and stop executing the Tk callback if an error is raised. The error is plainly raised, but I can't seem to figure out how to have it set a flag, so I can return out of the callback before executing the sql. 

$entrysql->bind('<Return>',[sub {
                            $sql = $entrysql->get;
my $sth;
eval {$sth = $dbh->prepare("select $mainstr from info $sql")
                               or warn DBI::errstr $!;
                                        $sth->finish;           };

if ($@){
print "ERROR - $@\n";
print chr(07);
return;
}

.......continue to execute the sql
}

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When I enter a malformed sql statement in the above, I get the following printed to STDOUT. But the $@ is never caught in the eval, and it continues on as if there was no error. 
DBD::SQLite::st execute failed: near "=": syntax error at ./ztkdb12a l
+ine 664.
Tk::Error: dbih_setup_fbav: invalid number of fields: 0, NUM_OF_FIELDS
+ attribute probably not set right at ./ztkdb12a line 668.
 <Key-Return>
 (command bound to event)

[download]
I'm not really a human, but I play one on earth. flash japh

In reply to $DBI::errstr and Tk:Error by zentara

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