Ora2Pg is a free tool used to migrate an Oracle database to a PostgreSQL compatible schema. It connects your Oracle database, scan it automatically and extracts its structure or data, it then generates SQL scripts that you can load into PostgreSQL.
Thanks for the report Pavel, commit 110a11c adds this translation. In next commit 6cbdd5d I have extended the translation to NUMTOYMINTERVAL() which is the same translation.
I did new function to orafce
numtodsinterval
. I think, so it can be easy transformed to expression by ora2pg (when orafce is not used)