Bonjour,
dans la table v$transaction y'a-t-il une colon pour connaître le segment d'annulation utilisé par la transaction ?
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V$TRANSACTION 
This view lists the active transactions in the system. 
 
Column  Datatype  Description  
ADDR 
 RAW(4) 
 Address of transaction state object 
 
XIDUSN 
 NUMBER 
 Undo segment number 
 
XIDSLOT 
 NUMBER 
 Slot number 
 
XIDSQN 
 NUMBER 
 Sequence number 
 
UBAFIL 
 NUMBER 
 Undo block address (UBA) filenum 
 
UBABLK 
 NUMBER 
 UBA block number 
 
UBASQN 
 NUMBER 
 UBA sequence number 
 
UBAREC 
 NUMBER 
 UBA record number 
 
STATUS 
 VARCHAR2(16) 
 Status 
 
START_TIME 
 VARCHAR2(20) 
 Start time (wall clock) 
 
START_SCNB 
 NUMBER 
 Start system change number (SCN) base 
 
START_SCNW 
 NUMBER 
 Start SCN wrap 
 
START_UEXT 
 NUMBER 
 Start extent number 
 
START_UBAFIL 
 NUMBER 
 Start UBA file number 
 
START_UBABLK 
 NUMBER 
 Start UBA block number 
 
START_UBASQN 
 NUMBER 
 Start UBA sequence number 
 
START_UBAREC 
 NUMBER 
 Start UBA record number 
 
SES_ADDR 
 RAW(4) 
 User session object address 
 
FLAG 
 NUMBER 
 Flag 
 
SPACE 
 VARCHAR2(3) 
 "Yes", if a space transaction 
 
RECURSIVE 
 VARCHAR2(3) 
 "Yes", if a recursive transaction 
 
NOUNDO 
 VARCHAR2(3) 
 "Yes" if a no undo transaction 
 
PTX 
 VARCHAR 2(3) 
 YES if parallel transaction, otherwise set to NO 
 
PRV_XIDUSN 
 NUMBER 
 Previous transaction undo segment number 
 
PRV_XIDSLT 
 NUMBER 
 Previous transaction slot number 
 
PRV_XIDSQN 
 NUMBER 
 Previous transaction sequence number 
 
PTX_XIDUSN 
 NUMBER 
 Rollback segment number of the parent XID  
 
PTX_XIDSLT 
 NUMBER 
 Slot number of the parent XID 
 
PTX_XIDSQN 
 NUMBER 
 Sequence number of the parent XID 
 
DSCN_B 
 NUMBER 
 Dependent SCN base 
 
DSCN_W 
 NUMBER 
 Dependent SCN wrap 
 
USED_UBLK 
 NUMBER 
 Number of undo blocks used 
 
USED_UREC 
 NUMBER 
 Number of undo records used 
 
LOG_IO 
 NUMBER 
 Logical I/O 
 
PHY_IO 
 NUMBER 
 Physical I/O 
 
CR_GET 
 NUMBER 
 Consistent gets 
 
CR_CHANGE 
 NUMBER 
 Consistent changes
D'avance merci.