begin
  execute immediate 'DROP FUNCTION OWB$CDC$GET_TXNS_START_TIME';
exception
  when others
  then
    null;
end;
/
commit;

begin
  execute immediate 'DROP FUNCTION OWB$CDC$GET_LATEST_UB';
exception
  when others
  then
    null;
end;
/
commit;

begin
  execute immediate 'DROP FUNCTION OWB$CDC$GET_LAST_DAY_LB';
exception
  when others
  then
    null;
end;
/
commit;

begin
  execute immediate 'DROP FUNCTION OWB$CDC$GET_LAST_DAY_UB';
exception
  when others
  then
    null;
end;
/
commit;

begin
  execute immediate 'DROP FUNCTION OWB$CDC$GET_LAST_MONTH_LB';
exception
  when others
  then
    null;
end;
/
commit;

begin
  execute immediate 'DROP FUNCTION OWB$CDC$GET_LAST_MONTH_UB';
exception
  when others
  then
    null;
end;
/
commit;

begin
  execute immediate 'DROP FUNCTION OWB$CDC$GET_LAST_WEEK_LB';
exception
  when others
  then
    null;
end;
/
commit;

begin
  execute immediate 'DROP FUNCTION OWB$CDC$GET_LAST_WEEK_UB';
exception
  when others
  then
    null;
end;
/
commit;