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  • #129

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Opened Jun 25, 2021 by 宋永裕@songyongyu💬
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[数据库] group_concat字符长度截断问题

对启用了LPTIM32外设的例程执行查询操作:

SELECT
	group_concat(DISTINCT(name) separator ',')
FROM
	mf_template_peripheral mtp
WHERE
	mtp.template_id = 1402873872377712642;

得到:LPTI。

经查,MySQL中可以配置group_concat_max_len的长度

查看:
  SELECT @@global.group_concat_max_len;
  show variables like "group_concat_max_len"
设置:
       SET GLOBAL group_concat_max_len=102400;
       SET SESSION group_concat_max_len=102400; 

配置完成后再查询,得到:LPTIM32

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Reference: fmsh-web-develop/mfang2.0#129