SQL Guide : Database system tables and system views : System tables : SYS_RELAUTH
  
SYS_RELAUTH
This table contains GRANT privileges issued for each table name and user name combination. When a database is created with no GRANT statements executed, this table is empty.
Column name
Description
REL_ID
Table or object identifier.
UR_ID
User or role identifier.
PRIV
Information about privileges of a user or a role. Each privilege is related to someone (GRANT_ID) who has granted it.
GRANT_ID
Grantor identifier.
GRANT_TIM
Grant time.
GRANT_OPT
If set to "Yes", the user who receives the privilege may grant the privilege to other users. The possible values are "Yes" or "No".
See also
System tables