private function getMissingIndexesByTable() { $missingIndexesByTable = []; foreach ($this->db->listTables() as $tableName) { $missingIndexes = $this->db->listMissingForeignKeyIndexes($tableName); if (count($missingIndexes)) { $missingIndexesByTable[$tableName] = $missingIndexes; } } return $missingIndexesByTable; }