This post reads eerily like another one I answered just last week (too lazy to dig it out now, but this whole thing reads a lot like "FAILED TO SEARCH" and "CROSS POSTING").
So, my advise is: search before posting questions!
Besides that, the whole requirement sounds as if you want to build an ETL solution on top of SAP HANA with plain SQL and the use of BLOBS.
The obvious first question here is of course: why BLOBS when dealing with CSV (character data)?
And of course as well: why would you want to do that in the first place?
There's SAP Data Services, there's SAP HANA Enterprise Information Management option and there are tons of other ETL tools that could handle this requirement.
Technically you can do loop over CLOB data and try to get out single column values (SUBSTR works on CLOBS), but you would still need to dynamically build a target structure.
Honestly, this approach doesn't seem to be thought through all that much.
my 2 ct.