trace 'alter table' by callstack

trace_atb.sql

SQL> alter session set events 'sql_trace {callstack: fprefix atb} errorstack(1)';

Session altered.

SQL> begin execute immediate 'alter table dd add b int';end;
  2  /

PL/SQL procedure successfully completed.

trace_atb_trace.trc

dbkedDefDump(): Starting a non-incident diagnostic dump (flags=0x0, level=1, mask=0x0)
----- Error Stack Dump -----
<error barrier> at 0x7ffe52ad1db0 placed dbkda.c@296
----- Current SQL Statement for this session (sql_id=ggx91ms9duqbz) -----
alter table dd add b int
----- PL/SQL Stack -----
----- PL/SQL Call Stack -----
  object      line  object
  handle    number  name
0x7977d758         1  anonymous block

----- Call Stack Trace -----
calling              call     entry                argument values in hex
location             type     point                (? means dubious value)
-------------------- -------- -------------------- ----------------------------