Probloems with CDS will be solved with SPS10

Hello, i'm trying to build an hdbdd file on HANA developer edition SPS9 based on one previous database schema made with postgreSQL

I'm facing some problems like these ones i show below to get the exact same model i previously had:

1.- Default values for date fields:

date: UTCDateTime default CURRENT_UTCTIMESTAMP;

Error while activating /pruebas/modelo.hdbdd:

"CURRENT_UTCTIMESTAMP" is a reserved SQL KEYWORD, and cannot be used as a name

2.- No boolean type.

3.- Association with default values

language_code: Association to modelo.language { code } not null default 'en'

Association type cannot be used as constants or default value

4.- Null default values

reference: String(50) default null;

Association type cannot be used as constants or default value

So my question is if these issues will be solved in the new SPS10. i've read about the default values for date will...but what about the others?

If not, could someone give an alternative to these problems?

Thank you very much.

Best regards,

Luis