Hi,
1. Can I use 'goto' structure?
At present GOTO statement is not supported in HANA
2. Can I use function in procedure ?
CREATE FUNCTION statement is no longer supported.
https://websmp109.sap-ag.de/~sapidb/011000358700000604932011
Although i guess you should be able to call another procedure inside a procedure.
3.UPDATE TEMPORARY TABLE
It is possible in HANA, may be you are using older HANA version.
Regards,
Vivek