class.ilTreeDBUpdateSteps8.php

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<?php

declare(strict_types=1);

class ilTreeDBUpdateSteps8 implements ilDatabaseUpdateSteps
{
    protected ilDBInterface $db;

    public function prepare(ilDBInterface $db): void
    {
        $this->db = $db;
    }

    public function step_1(): void
    {
        // Add index
        if ($this->db->indexExistsByFields('tree', ['child'])) {
            $this->db->dropIndex('tree', 'i1');
        }
    }
}