In Oracle Data Mining 10g, data mining metadata and PL/SQL packages are stored in the DMSYS
schema. In Oracle Data Mining 11g and 12c, DMSYS
no longer exists; data mining metadata objects are stored in SYS
.
When Oracle Database 10g is upgraded to 12c, all data mining metadata objects and PL/SQL packages are migrated from DMSYS
to SYS
. The DMSYS
schema and its associated objects are removed after a successful migration. When DMSYS
is removed, the SYS.DBA_REGISTRY
view no longer lists Oracle Data Mining as a component.
After upgrading to Oracle Database 12c, you can no longer switch to the Data Mining Scoring Engine (DMSE
). The Scoring Engine does not exist in Oracle Database 11g or 12c.