SQL>
1 select xidusn, xidslot, xidsqn
2 from v$transaction
3* where addr=(select taddr from v$session where sid = 191)
SQL> /
XIDUSN XIDSLOT XIDSQN
---------- ---------- ----------
8 5 135143
Elapsed: 00:00:00.00
SQL> alter system dump undo header '_SYSSMU8_3131027383$';
System altered.
SQL> alter system dump undo block '_SYSSMU8_3131027383$' xid 8 5 135143;
System altered.
Elapsed: 00:00:00.72
********************************************************************************
Undo Segment: _SYSSMU8_3131027383$ (8)
********************************************************************************
Extent Control Header
-----------------------------------------------------------------
Extent Header:: spare1: 0 spare2: 0 #extents: 47 #blocks: 14207
last map 0x00000000 #maps: 0 offset: 4080
Highwater:: 0x00c1833f ext#: 7 blk#: 319 ext size: 1024
#blocks in seg. hdr's freelists: 0
#blocks below: 0
mapblk 0x00000000 offset: 7
Unlocked
Map Header:: next 0x00000000 #extents: 47 obj#: 0 flag: 0x40000000
TRN CTL:: seq: 0x05e1 chd: 0x0015 ctl: 0x0000 inc: 0x00000000 nfb: 0x0001
mgc: 0xb000 xts: 0x0068 flg: 0x0001 opt: 2147483646 (0x7ffffffe)
uba: 0x00c18326.05e1.25 scn: 0x0281.d17c806a
Version: 0x01
FREE BLOCK POOL::
uba: 0x00c18326.05e1.2a ext: 0x7 spc: 0x13ea
uba: 0x00000000.05e1.02 ext: 0x7 spc: 0x1f06
uba: 0x00000000.05e1.03 ext: 0x7 spc: 0x18a0
uba: 0x00000000.052c.01 ext: 0x1c spc: 0x1f7c
uba: 0x00000000.0419.01 ext: 0x29 spc: 0x1ed0
TRN TBL::
index state cflags wrap# uel scn dba parent-xid nub stmt_num cmt
------------------------------------------------------------------------------------------------
0x00 9 0x00 0x20ff2 0xffff 0x0281.d17c8718 0x00c18326 0x0000.000.00000000 0x00000001 0x00000000 1330944981
0x01 9 0x00 0x20fd4 0x001b 0x0281.d17c8530 0x00c18321 0x0000.000.00000000 0x00000001 0x00000000 1330944603
0x02 9 0x00 0x20fd7 0x000e 0x0281.d17c837c 0x00c18320 0x0000.000.00000000 0x00000001 0x00000000 1330943868
0x03 9 0x00 0x20fe3 0x0010 0x0281.d17c8220 0x00c1831f 0x0000.000.00000000 0x00000001 0x00000000 1330943387
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