Gigpress Plugin – global $wpdb;

hi.
Im using a plugin called gigpress. I wanted to have the artist name link to an artists WP page. Someone else asked a year ago about it and the suggestion was to use;

‘<?php
global $wpdb;
if($artist_page = $wpdb->get_var(“
SELECT post_id
FROM wp_postmeta
WHERE meta_key = ‘gigpress_artist’
AND meta_value = {$showdata[‘artist_id’]}
LIMIT 1″)) : ?>
<p class=”gigpress-artist-link” id=”artist-link-<?php echo $showdata[‘artist_id’]; ?>”>
“>More about <?php $showdata[‘artist’]; ?> – artist bio, news, mp3 samples
</p>
<?php endif; ?>’

What I understood from that was I needed to add a custom field on an artists WP page with a value that matches their artist ID which is shown within gigpress admin.

I pasted the code into all the gigpress templates one after another but did not see any change anywhere.

the guy who used it said

The code you gave returns a permalink for any one page where the value of a custom field called ‘gigpress_artist’ matches the artist_id. If there’s not a match, it returns the permalink of the current page.

Can someone just double check the code is valid please? Once I know that i will just paste it systmatically on templates until i see something happen.

I also want to do the same thing with the venue names but assume i can just modify the code above and change the artist_id to venue_id and custom field names for the same result.

Thanks in adavance for reading and any help offered.
Liam