mysql - FIND_IN_SET 慢，无法使用 IN()

Question

我有一个存储过程，它运行缓慢。有没有更好的方法将表 ID 传递给过程而不是使用 FIND_IN_SET？

表列 e.fk_trans_history_id 是 INT(32)

DELIMITER $$

CREATE DEFINER=`root`@`localhost` PROCEDURE `1_trans_hist_ent_items_sel`(b INT,tid TEXT)
BEGIN
SELECT 
    e.id,
    e.fk_trans_history_id,
    e.fk_prod_pack_id,
    e.line_num,
    e.vat_code,
    e.code,
    e.make,
    e.model,
    e.price,
    e.discount,
    e.cover,
    e.warranty,
    p.make,
    p.model,
    p.weight,
    p.width,
    p.depth,
    p.height,
    p.cost,
    p.cover_value_each,
    p.web_model,
    k.stock - k.repair
FROM
    1_trans_history_entries e
        LEFT JOIN
    1_products p ON p.id = e.fk_prod_pack_id
        AND LEFT(code, 1) <> 'P'
        LEFT JOIN
    1_stock k ON k.fk_products_id = p.id AND k.branch = b
WHERE
    (e.code IN ('MiscShip' , 'Collect')
        OR (ASCII(e.code) > 47
        AND ASCII(e.code) < 58))
        AND FIND_IN_SET(e.fk_trans_history_id, tid)
ORDER BY e.id;
END

Answer 1

将要匹配的 ID 放入临时表中，并与该表连接。

CREATE TEMPORARY TABLE temp_trans_hist_ent_items_sel_ids (
    id
);
INSERT INTO temp_trans_hist_ent_items_sel_ids VALUES (1), (10), ...;

那么程序中的查询就可以使用:

JOIN temp_trans_hist_ent_items_sel_ids AS temp ON e.fk_trans_history_id = temp.id