show SQL errors

diff --git a/web_ui.pl b/web_ui.pl
index f82f67a..200b618 100755 (executable)
--- a/web_ui.pl
+++ b/web_ui.pl
@@ -86,6 +86,9 @@ get '/gnuplot' => sub {
 
        $ret = Mojo::JSON->new->decode( $ret );
 
+       return $self->render('gnuplot', sql => $sql, img => '', gnuplot => $ret->{error} )
+               if exists $ret->{error};
+
        my $dir = $self->app->home->rel_dir('public');
 
        my $name = $sql;