Cleaning BC_SLD_CHANGELOG

Hi experts,

I want to create a script to delete obsolete entries of table BC_SLD_CHANGELOG from my PI. The conventional method (through SLD - Administration), is very slow.

What i need to know is how the column TSTAMP is stored, considering that we are on oracle 11. This information will be useful for the date filtering.

SQL> desc sapsr3db.bc_sld_changelog;

Name                                      Null?    Type

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

APPL                                      NOT NULL NVARCHAR2(1)

NA_KEY                                    NOT NULL NUMBER(10)

TSTAMP                                    NOT NULL NVARCHAR2(17)

COUNTER                                   NOT NULL NUMBER(10)

CLASS_HASH                                NOT NULL NUMBER(10)

CLASS_HANDLE                              NOT NULL NUMBER(10)

OBJNAME                                            NVARCHAR2(1333)

OBJTYPE                                   NOT NULL NVARCHAR2(1)

OP                                        NOT NULL NVARCHAR2(1)

XML_FORMAT                                NOT NULL NUMBER(10)

XML                                                BLOB

XML_2                                              BLOB

WHO                                                NVARCHAR2(127)

Thanks in advance.

Gustavo Prado