SELECT
  CERT_ID,                                 -- CERT_ID VARCHAR2(52)
  DN,                                      -- DN VARCHAR2(255)
  SERIAL_NUM,                              -- SERIAL_NUM VARCHAR2(40)
  ISSUER,                                  -- ISSUER VARCHAR2(255)
  KEYSIZE,                                 -- KEYSIZE NUMBER
  STATUS                                   -- STATUS VARCHAR2(16)
FROM
  GV$WALLET
WHERE
  inst_id = USERENV('INSTANCE')