Question

How to increase group_concat_max_len mysql variable in managed database?

Need to increase group_concat_max_len variable because currently it supports 1024 character when using GROUP_CONCAT.

When I run this SET GLOBAL group_concat_max_len = 4096, I’m getting below error.

Error Code: 1227. Access denied; you need (at least one of) the SUPER or SYSTEM_VARIABLES_ADMIN privilege(s) for this operation

While using SET SESSION or SET LOCAL, sometime it’s working but most of the time its not working.

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Hi @dbuser

Session variables only apply to the current connections (Session) which you have made. when you exit from the session, the session variables which you have set will be back to earlier values.

whereas global variables apply to all new connection which you make.

To “SET GLOBAL group_concat_max_len = 4096;” Please raise a support ticket with us, we can help you with making required changes from our backend.

Regards, Rajkishore