Implements hook_user_predelete().
function node_user_predelete($account) {
// Delete nodes (current revisions).
// @todo Introduce node_mass_delete() or make node_mass_update() more flexible.
$nodes = db_select('node', 'n')
->fields('n', array(
'nid',
))
->condition('uid', $account->uid)
->execute()
->fetchCol();
node_delete_multiple($nodes);
// Delete old revisions.
$revisions = db_query('SELECT vid FROM {node_revision} WHERE uid = :uid', array(
':uid' => $account->uid,
))
->fetchCol();
foreach ($revisions as $revision) {
node_revision_delete($revision);
}
}