yii\db\pgsql\Schema::insert PHP Method

    public function insert($table, $columns)
    {
        $params = [];
        $sql = $this->db->getQueryBuilder()->insert($table, $columns, $params);
        $returnColumns = $this->getTableSchema($table)->primaryKey;
        if (!empty($returnColumns)) {
            $returning = [];
            foreach ((array) $returnColumns as $name) {
                $returning[] = $this->quoteColumnName($name);
            }
            $sql .= ' RETURNING ' . implode(', ', $returning);
        }
        $command = $this->db->createCommand($sql, $params);
        $command->prepare(false);
        $result = $command->queryOne();
        return !$command->pdoStatement->rowCount() ? false : $result;
    }