How to copy data over into my custom database table - wordpress

Question

I have the following function which inserts data from the postmeta table into a custom database table wp_fixtures_results.
I am using WPAll Import Plugin action pmxi_saved_post. So the code runs during an import process.
The purpose of the code is to migrate data from wp_postmeta into wp_fixtures_results which is the custom table.
When running the code for a fresh import, the data is stored which is ordinarily stored in wp_postmeta is the moved into the custom table. This works perfectly.
However, the data only runs for the INSERT query as shown in the code. Using the same plugin action I need to update the data from postmeta into the custom table. The issue is the code is only working for the INSERT query. How do I check if the data has changed in the postmeta and during the import process which updates the data, update the custom table too?
if ($post_type === 'fixture-result') {
function save_fr_data_to_custom_database_table($post_id)
{
// Make wpdb object available.
global $wpdb;
// Retrieve value to save.
$value = get_post_meta($post_id, 'fixtures_results', true);
// Define target database table.
$table_name = $wpdb->prefix . "fixtures_results";
// Insert value into database table.
$wpdb->insert($table_name, array('ID' => $post_id, 'fixtures_results' => $value), array('%d', '%s'));
// Update query not working - doesn't change data.
$wpdb->update($table_name, array('ID' => $post_id, 'fixtures_results' => $value), array('%d', '%s'));
// Delete temporary custom field.
delete_post_meta($post_id, 'fixtures_results');
}
add_action('pmxi_saved_post', 'save_fr_data_to_custom_database_table', 10, 1);
}
The wp_postmeta table
The wp_fixtures_results (custom table)

Answer 1

This is an old question by now, but I'd say that the $wpdb->update is redundant. The insert is going to create the row and store the fields. The $wpdb->insert should return "1" - check that value to verify that the insert succeeded before deleting the postmeta entry. The call to update is not necessary.