Alter Command in SQLScript SAP HANA

Hello Everyone,

I am trying the execute Alter command using SQL Console to change the Column type from NVARCHAR to SMALLINT in SAP HANA but i am getting the below error -

ALTER TABLE "TEST_TAB" ALTER (ID SMALLINT);

SAP DBTech JDBC: [7]: feature not supported: cannot modify column type from nvarchar to smallint: ID: line 1 col 31 (at pos 30)

is there any way out to rectify the above . SAP HANA Version SPS09.

Thanks,

Shivam