Toto je starodávný skript, který jsem dokončil před 6-7 lety, abych splnil tento úkol v PHP/Propel. Doufám, že to bude užitečné pro někoho dalšího:
require_once 'common/Autoloader.php';
require_once 'propel/Propel.php';
\Propel::init('db/runtime-conf.php');
function truncateHierarchy(\PropelPDO $propel) {
/* @var $state \PropelStatement */
$state = $propel->prepare('TRUNCATE database.person_hierarchy');
$state->execute();
}
function insertHierarchy(\PropelPDO $propel, $length) {
if ($length == 0) {
$state = $propel->prepare('INSERT INTO database.person_hierarchy SELECT id, id, 0 FROM person;');
$state->execute();
return $state->rowCount();
} else if ($length == 1) {
$state = $propel->prepare('INSERT INTO database.person_hierarchy SELECT parent_person_id, id, 1 FROM person WHERE id != parent_person_id;');
$state->execute();
return $state->rowCount();
} else {
$sql = "INSERT INTO database.person_hierarchy \n";
$sql .= "SELECT p.parent_person_id, c" . ($length - 1) . ".id, " . $length . " FROM database.person AS p \n";
for ($i = 1; $i <= $length - 1; $i++) {
$sql .= "LEFT JOIN person AS c" . $i . " ON " . ($i == 1 ? 'p.id' : 'c' . ($i - 1) . '.id') . " = c" . $i . ".parent_person_id \n";
}
$sql .= "WHERE p.parent_person_id != p.id \n";
for ($i = 1; $i <= $length - 1; $i++) {
$sql .= "AND c" . $i . ".parent_person_id != c" . $i . ".id \n";
}
echo $sql;
$state = $propel->prepare($sql);
$state->execute();
return $state->rowCount();
}
}
/* @var $connect \PropelConnection */
$propel = \Propel::getConnection();
$propel->beginTransaction();
try {
truncateHierarchy($propel);
$propel->commit();
} catch (\Exception $e) {
error_log_exc($e);
echo "Failed to truncate person hierarchy!\n";
$propel->rollBack();
exit();
}
$length = 0;
$inserts = -1;
while ($inserts !== 0 || $length != 10) {
$propel->beginTransaction();
try {
$inserts = insertHierarchy($propel, $length);
if ($inserts == 0) {
echo "No persons exist at length " . $length . ".\n";
} else {
echo $inserts . " rows inserted for length " . $length . ".\n";
}
$length++;
$propel->commit();
} catch (\Exception $e) {
error_log_exc($e);
echo "Failed to regenerate person hierarchy!\n";
$propel->rollBack();
exit();
}
}
echo "Regenerated person hierarchy!\n";
exit();