Oracle数据字典表
create table undo$ /* undo segment table */( us# number not null, /* undo segment number */
name varchar2("M_IDEN") not null, /* name of this undo segment */
user# number not null, /* owner: 0 = SYS(PRIVATE), 1 = PUBLIC */
file# number not null, /* segment header file number */
block# number not null, /* segment header block number */
scnbas number, /* highest commit time in rollback segment */
scnwrp number, /* scnbas - scn base, scnwrp - scn wrap */
xactsqn number, /* highest transaction sequence number */
undosqn number, /* highest undo block sequence number */
inst# number, /* parallel server instance that owns the segment */
status$ number not null, /* segment status (see KTS.H): */
/* 1 = INVALID, 2 = AVAILABLE, 3 = IN USE, 4 = OFFLINE, 5 = NEED RECOVERY,
* 6 = PARTLY AVAILABLE (contains in-doubt txs)
*/
ts# number, /* tablespace number */
ugrp# number, /* The undo group it belongs to */
keep number,
optimal number,
flags number,
spare1 number,
spare2 number,
spare3 number,
spare4 varchar2(1000),
spare5 varchar2(1000),
spare6 date
)
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