在PolarDB有的sql里面有自定义存储函数这种想走列存有什么优化建议吗？

在PolarDB有的sql里面有自定义存储函数还有的子查询里面有limit语句的这种想走列存有什么优化建议吗？自定义函数例如这种SELECT
a.*,
func_create_url_name(a.title) AS url_name
FROM
(
SELECT
con.contentid,
con.catid,
cat.name AS catname,
cat.abbr AS catabbr,
con.modelid,
con.title,
con.subtitle,
con.url AS info_url,
con.tags AS tags,
con.tags AS original_tags,
CASE
WHEN LOWER(LEFT(con.thumb, 4)) = 'http' THEN con.thumb
ELSE CONCAT('https://xxx/', con.thumb)
END AS thumb,
con.published,
con.pv
FROM
cmstop_content con
INNER JOIN cmstop_category cat ON cat.catid = con.catid
AND cat.first_parentid = '201'
AND FIND_IN_SET('204', cat.parentids)
INNER JOIN (
SELECT
content_tag.contentid
FROM
cmstop_tag tag
INNER JOIN cmstop_content_tag content_tag ON tag.tagid = content_tag.tagid
WHERE
tag.tag = 'zyp-pd2202071028'
) content_tag ON con.contentid = content_tag.contentid
WHERE
con.status = 6
AND con.modelid IN (1, 3, 4, 10)
ORDER BY
con.published DESC,
con.contentid DESC
LIMIT
1
) a
还有这种子查询有limit的。SELECT
ep.product_id,
p.products_name AS products_name_m,
p.products_url_name,
ep.enterprise_id,
ent.enterprise_name_en AS enterprise_name,
ent.url_name AS enterprise_url_name,
ep.specification,
DATE_FORMAT(ep.price_date, '%Y-%m-%d') AS price_date,
ep.price_unit,
ep.price AS current_price,
(
SELECT
ep2.price
FROM
t_zy_enterprise_price ep2
WHERE
ep2.product_id = ep.product_id
AND ep2.enterprise_id = ep.enterprise_id
AND ep2.price_date < ep.price_date
AND IFNULL(ep2.price_date, '') != ''
AND IFNULL(ep2.price, '') != ''
AND IFNULL(ep2.delflag, '') != '1'
ORDER BY
ep2.price_date DESC
LIMIT
1
) AS previous_price,
0 AS subscribe_flag
FROM
t_zy_enterprise_price ep
INNER JOIN t_e_products p ON p.products_id = ep.product_id
AND p.information_flag = '1'
AND IFNULL(p.delflag, '0') != '1'
INNER JOIN t_zy_enterprise ent ON ent.id = ep.enterprise_id
AND IFNULL(ent.delflag, '0') != '1'
INNER JOIN (
SELECT
ep3.product_id,
ep3.enterprise_id,
MAX(ep3.price_date) AS max_price_date
FROM
t_zy_enterprise_price ep3
GROUP BY
ep3.product_id,
ep3.enterprise_id
) pimax ON pimax.product_id = ep.product_id
AND pimax.enterprise_id = ep.enterprise_id
AND pimax.max_price_date = ep.price_date
WHERE
ep.delflag = '0'
ORDER BY
subscribe_flag DESC,
ep.price_date DESC,
ep.update_date DESC,
ep.id
LIMIT
5
CREATE DEFINER=young@% FUNCTION func_create_url_name(
p_str varchar(500) charset utf8mb4 collate utf8mb4_general_ci ) RETURNS varchar(500) CHARSET utf8
SQL SECURITY INVOKER
BEGIN
DECLARE urlName VARCHAR(500);

SET urlName = p_str;

SET urlName = REPLACE(urlName,'β','');
SET urlName = REPLACE(urlName,'α','');
SET urlName = REPLACE(urlName,'ω','');
SET urlName = REPLACE(urlName,'~', '');
SET urlName = REPLACE(urlName,'!', '');
SET urlName = REPLACE(urlName,'！', '');
SET urlName = REPLACE(urlName,'#', '');
SET urlName = REPLACE(urlName,'$', '');
SET urlName = REPLACE(urlName,'¥', '');
SET urlName = REPLACE(urlName,'￥', '');
SET urlName = REPLACE(urlName,'^', '');
SET urlName = REPLACE(urlName,'*', '');
SET urlName = REPLACE(urlName,'%', '');
SET urlName = REPLACE(urlName,';', '');
SET urlName = REPLACE(urlName,'；', '');
SET urlName = REPLACE(urlName,'.', '');
SET urlName = REPLACE(urlName,'。', '');
SET urlName = REPLACE(urlName,'·', '');
SET urlName = REPLACE(urlName,'+', '');
SET urlName = REPLACE(urlName,'=', '');
SET urlName = REPLACE(urlName,':', '');
SET urlName = REPLACE(urlName,'：', '');
SET urlName = REPLACE(urlName,'>', '');
SET urlName = REPLACE(urlName,'<', '');
SET urlName = REPLACE(urlName,'》', '');
SET urlName = REPLACE(urlName,'《', '');
SET urlName = REPLACE(urlName,'[', '');
SET urlName = REPLACE(urlName,']', '');
SET urlName = REPLACE(urlName,'【', '');
SET urlName = REPLACE(urlName,'】', '');
SET urlName = REPLACE(urlName,'{', '');
SET urlName = REPLACE(urlName,'}', '');
SET urlName = REPLACE(urlName,'(', '');
SET urlName = REPLACE(urlName,')', '');
SET urlName = REPLACE(urlName,'（', '');
SET urlName = REPLACE(urlName,'）', '');
SET urlName = REPLACE(urlName,'、', '');
SET urlName = REPLACE(urlName,'|', '');
SET urlName = REPLACE(urlName,'™', '');
SET urlName = REPLACE(urlName,'®', '');
SET urlName = REPLACE(urlName,'©', '');
SET urlName = REPLACE(urlName,'?', '');
SET urlName = REPLACE(urlName,'？', '');
SET urlName = REPLACE(urlName,'\'', ' ');
SET urlName = REPLACE(urlName,'"', ' ');
SET urlName = REPLACE(urlName,'&', ' ');
SET urlName = REPLACE(urlName,'—', ' ');
SET urlName = REPLACE(urlName,'/', ' ');
SET urlName = REPLACE(urlName,'\', ' ');
SET urlName = REPLACE(urlName,'，', ' ');
SET urlName = REPLACE(urlName,',', ' ');
SET urlName = REPLACE(urlName,'　', ' ');
SET urlName = REPLACE(urlName,' ', ' ');
SET urlName = REPLACE(urlName,' ', ' ');
SET urlName = REPLACE(urlName,' ', '-');
SET urlName = REPLACE(urlName,'----', '-');
SET urlName = REPLACE(urlName,'---', '-');
SET urlName = REPLACE(urlName,'--', '-');
SET urlName = TRIM(urlName);
SET urlName = TRIM(BOTH '-' FROM urlName);