Could these SQL statements do any harm to the installation?

[vinc1402]

https://support.reliablesite.net/kb/a280/optimizing-the-whmcs-database-for-performance.aspx

ALTER TABLE tblproductconfigoptionssub DROP INDEX configid, ADD INDEX configid (configid ASC, hidden ASC, sortorder ASC, id ASC);
ALTER TABLE tblpricing ADD INDEX relid (relid ASC, type ASC, currency ASC);
ALTER TABLE tblproductconfiglinks ADD UNIQUE INDEX pid_gid (pid ASC, gid ASC);
ALTER TABLE tblproductconfigoptions DROP INDEX productid, ADD INDEX productid (gid ASC, hidden ASC);

I just found this article, would it be a safe operation to do?

 

 

Edited November 19, 2019 by vinc1402