I am new to SAP HANA and was recently migrating some of our databases to it and found it very good in performance.
The problem I am facing is that I am unable to upload
This has been discussed here on SO before. Using the ARRAY() function is the only way to insert an ARRAY into an array-typed column.
If you want to load array data from a file you will have to use a custom loading program that constructs the ARRAY(....) function call for each record.
Depending on your use case, you might reconsider using other storage options for your data.