Is it possible upgrade SAP HANA DB without system/root user??

Hi All,
I am supporting banking client.
they are expecting to do SAP HANA upgrade(from OS or with HLM) .
even some time patch Kernels also.
my question is can we upgrade the SAP HANA system with SYSTEM user and root from OS(create different user which can support this process?) .
as per SAP HANA Master Update Guide.
You have user names and passwords for the following users
○<sid>adm user
○sapadm user
○S-user for the SAP Service Marketplace (SMP)●
but we need "SYSTEM" use to do upgrade process?.
with HLM: attaching info
Thanks
Ravindar

Dear Rahul,
thank you for the response.
But... if we activate and install a demo license on the customer's server, how can we upgrade its old SAP B1 2007 database?
Do we have to download a last SBO 8.8 PL (i.e. PL 19) and run the upgrade wizard of this PL to upgrade COMMON db, SAP server, etc... and the old SBO 2007 cusomer db?
Can we directly upgrade old SBO 2007 db to SBO 8.8 PL 19 or we must before upgrade to an intermediate PL (i.e. PL 14) and later upgrade to PL 19?
Regards
Emanuele

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