PolarDB的select distinct这种sql能走列存吗？

PolarDB的select distinct这种sql能走列存吗？
SELECT
DISTINCT bl.buying_lead_id,
bl.product_name,
bl.cas_no,
bl.quantity,
bl.unit,
CASE
WHEN IFNULL(bl.unit, '') = '' THEN ''
ELSE CONCAT('typedefine.INQUIRY_UNIT_TYPE.', bl.unit)
END AS unit_m,
bl.country,
bl.post_date
FROM
t_e_buying_lead bl
INNER JOIN t_e_all_produce_v1 sdt2 ON bl.cas_no = sdt2.produce_cas_no
AND sdt2.delflag = '0'

WHERE
IFNULL(bl.cas_no, '') != ''
AND IFNULL(bl.is_website_show, '') != '1'
AND bl.is_public = '1'
AND bl.buying_lead_grade IN ('2', '3')
AND bl.post_date >= date_sub(SYSDATE(), INTERVAL 4 DAY)
AND IFNULL(bl.close_flag, '') != '1'
AND bl.delflag = '0'

ORDER BY
bl.post_date DESC
limit 20;