How to limit logging with conditional supplemental log groups

Greetings,

We're wanting to exclude columns from supplemental logging to prevent a log mining application from mining PII data columns.

We thought that creating a log group excluding those columns would work, which it does if the excluded column is not updated, but

it is available for logging if that column is updated.

Does anyone know of a work-around for this?

Here's a test we did:

Column DUMMY is excluded from the log group:

desc teststm

Name                                                                                Null?    Type

----------------------------------------------------------------------------------- -------- --------------------------------------------------------

DUMMY                                                                                        VARCHAR2(1)

TESTCOL                                                                                      VARCHAR2(20)

TESTCOL2                                                                                     VARCHAR2(20)

TESTPK                                                                              NOT NULL VARCHAR2(20)

>list

  1  select substr(LOG_GROUP_NAME,1,33), substr(TABLE_NAME,1,33), substr(COLUMN_NAME,1,33)