In previous section, we left the planner stuck on a sequential scan despite believing the table has 50 million rows. The missing piece is column-level statistics. Let's pick up where we left off and inject histogram bounds for created_at.
dev.write(1, cmd)，详情可参考PDF资料
。新收录的资料是该领域的重要参考
Мерц резко сменил риторику во время встречи в Китае09:25，更多细节参见新收录的资料
// block: Wait for space (unbounded pending queue)