Redo Level 11 - Table Operations (DML)

This level includes all DML operations performed on table data, including INSERT, UPDATE and DELETE. Operations include:

These operations are described in more detail in the following sections. The full list of known operations in Oracle 10.2 is as follows:

CodeMnemonicDescription
11.1IURUndo
11.2IRPInsert Row Piece
11.3DRPDelete Row Piece
11.4LKRLock Row
11.5URPUpdate Row Piece
11.6ORPOverflow Row Piece
11.7MFC 
11.8CFA 
11.9CKI 
11.10SKL 
11.11QMIInsert Row Array
11.12QMDDelete Row Array
11.14DSC 
11.16LMN 
11.17LLB 
11.1919Update Row Array
11.20SHK 
11.2121 

Each operation operates on a single table block.

11.1 - Undo table operation

This operation is the undo for 11.2 (IRP), 11.3 (DRP) and 11.5 (URP) (and possibly other level 11 operations)

11.2 - Insert Row Piece (IRP)

This operation inserts a row piece into a table.

The following example was developed in Oracle 10.2.0.4 (Linux 32-bit)

Consider the following code:

CREATE TABLE team
(
  team_code    VARCHAR2(3),
  team_name    VARCHAR2(30),
  country_code VARCHAR2(3)
);

INSERT INTO team VALUES ('MCL','McLaren','GBR');
COMMIT;

Note that an initial row has been inserted into the table to simplify the redo log output

The statement:

INSERT INTO team VALUES ('FER','Ferrari','ITA');

generates the following redo:

CHANGE #1 TYP:2 CLS: 1 AFN:4 DBA:0x01001af0 OBJ:52432 SCN:0x0000.0012223a SEQ:  3 OP:11.2
  KTB Redo
  op: 0x01  ver: 0x01
  op: F  xid:  0x0006.010.000001b1    uba: 0x008004f1.0151.0b
  KDO Op code: IRP row dependencies Disabled
xtype: XA flags: 0x00000000  bdba: 0x01001af0  hdba: 0x01001aeb
itli: 2  ispac: 0  maxfr: 4858
tabn: 0 slot: 1(0x1) size/delt: 19
fb: --H-FL-- lb: 0x2  cc: 3
null: ---
col  0: [ 3]  46 45 52
col  1: [ 7]  46 65 72 72 61 72 69
col  2: [ 3]  49 54 41
KTB Redo
op: 0x01  ver: 0x01
op: F  xid:  0x0006.010.000001b1    uba: 0x008004f1.0151.0b

See KTBRedo

KDO Op code: IRP row dependencies Disabled

IRP Operation code: Insert Row Piece

row dependencies specifies whether row dependencies are disabled (default) or enabled for this table

xtype: XA flags: 0x00000000  bdba: 0x01001af0  hdba: 0x01001aeb

xtype transaction type. Can be XA, XR, CR or KDO_KDOM2

flags awaiting further information

bdba block DBA. Data block address of this block

hdba header DBA. Probably data block address of extent header

itli: 2  ispac: 0  maxfr: 4858

itli specifes the ITL slot number of the transaction performing the operation. In this example the row is locked by the transaction in the second ITL slot.

ispac awaiting further information

maxfr awaiting further information

tabn: 0 slot: 1(0x1) size/delt: 19

tabn specifies the table number. For non-clustered tables this will always be 0

slot specifies the slot number. Each block has an variable length array of slots. Each element in this array specifies the location of a row within the block. The first slot in the block is 0. In this example the row has been written to the second slot in the table (slot 1)

size/delt: specifies the change in size of the block. In this example, the size has increased by 19 bytes which consists of the following:

fb: --H-FL-- lb: 0x2  cc: 3

fb is the flag byte which contains eight bit flags with the following values:

FlagDescription
KCluster key
CClustered row
HHead piece of row
DDeleted row
FFirst piece in row
LLast piece in row
PPrevious row piece exists
NNext row piece exists

lb is the lock byte which specifies the transaction in the ITL table that is currently locking this row. In this example the row is locked by the transaction in the second ITL slot.

cc is the column count of the number of columns being inserted. In this example 3 column values are being inserted into the table.

col  0: [ 3]  46 45 52

Column 0 is the first column in the row. In this case the 3 byte VARCHAR2 value is 'FER'

col  1: [ 7]  46 65 72 72 61 72 69

Column 1 is the second column in the row. In this case the 7 byte VARCHAR2 value is 'FERRARI'

col  2: [ 3]  49 54 41

Column 2 is the third column in the row. In this case the 3 byte VARCHAR2 value is 'ITA' (Italy)

The above statement generated the following undo:

CHANGE #4 TYP:0 CLS:28 AFN:2 DBA:0x008004f1 OBJ:4294967295 SCN:0x0000.00122119 SEQ:  1 OP:5.1
ktudb redo: siz: 108 spc: 6734 flg: 0x0012 seq: 0x0151 rec: 0x0b
            xid:  0x0006.010.000001b1
ktubl redo: slt: 16 rci: 0 opc: 11.1 objn: 52432 objd: 52432 tsn: 4
Undo type:  Regular undo        Begin trans    Last buffer split:  No
Temp Object:  No
Tablespace Undo:  No
             0x00000000  prev ctl uba: 0x008004f1.0151.0a
prev ctl max cmt scn:  0x0000.00121033  prev tx cmt scn:  0x0000.00121034
txn start scn:  0x0000.00000000  logon user: 59  prev brb: 0  prev bcl: 0 KDO undo record:
KTB Redo
op: 0x03  ver: 0x01
op: Z
KDO Op code: DRP row dependencies Disabled
  xtype: XA flags: 0x00000000  bdba: 0x01001af0  hdba: 0x01001aeb
itli: 2  ispac: 0  maxfr: 4858
tabn: 0 slot: 1(0x1)

11.3 - Delete Row Piece (DRP)

This operation deletes a row piece from a table

The following example was developed in Oracle 10.2.0.4 (Linux 32-bit)

Consider the following code:

CREATE TABLE team
(
  team_code    VARCHAR2(3),
  team_name    VARCHAR2(30),
  country_code VARCHAR2(3)
);

INSERT INTO team VALUES ('MCL','McLaren','GBR');
INSERT INTO team VALUES ('FER','Ferrari','ITA');

COMMIT;

The statement:

DELETE FROM team WHERE team_code = 'FER';

generates the following redo:

CHANGE #1 TYP:2 CLS: 1 AFN:4 DBA:0x01001af0 OBJ:52432 SCN:0x0000.00123482 SEQ:  3 OP:11.3
  KTB Redo
  op: 0x11  ver: 0x01
  op: F  xid:  0x0008.014.00000172    uba: 0x00800025.02bc.2a
  Block cleanout record, scn:  0x0000.0012348c ver: 0x01 opt: 0x02, entries follow...
itli: 1  flg: 2  scn: 0x0000.00123482
itli: 2  flg: 2  scn: 0x0000.00123473
KDO Op code: DRP row dependencies Disabled
xtype: XA flags: 0x00000000  bdba: 0x01001af0  hdba: 0x01001aeb
itli: 2  ispac: 0  maxfr: 4858
tabn: 0 slot: 1(0x1)
KTB Redo
op: 0x011  ver: 0x01
op: F  xid:  0x0008.014.00000172    uba: 0x00800025.02bc.2a

See KTBRedo

Block cleanout record, scn:  0x0000.0012348c ver: 0x01 opt: 0x02, entries follow...

If the ITL has not been updated out since the last transaction changes where committed or rolled back then a block cleanout is performed

scn System change number of block cleanout. Format is wrap#.base#

ver Version number

opt Option number

itli: 1  flg: 2  scn: 0x0000.00123482

First ITL element being cleaned out.

itli ITL element number (1 based)

flg Flag

scn System Change Number of entry

itli: 2  flg: 2  scn: 0x0000.00123473

Second ITL element being cleaned out.

KDO Op code: DRP row dependencies Disabled

DRP Operation code: Dnsert Row Piece

row dependencies specifies whether row dependencies are disabled (default) or enabled for this table

xtype: XA flags: 0x00000000  bdba: 0x01001af0  hdba: 0x01001aeb

xtype transaction type. Can be XA, XR, CR or KDO_KDOM2

flags awaiting further information

bdba block DBA. Data block address of this block

hdba header DBA. Probably data block address of extent header

itli: 2  ispac: 0  maxfr: 4858

itli specifes the ITL slot number of the transaction performing the operation. In this example the row is locked by the transaction in the second ITL slot.

ispac awaiting further information

maxfr awaiting further information

tabn: 0 slot: 1(0x1)

tabn specifies the table number. For non-clustered tables this will always be 0

slot specifies the slot number. Each block has an variable length array of slots. Each element in this array specifies the location of a row within the block. The first slot in the block is 0. In this example the row was written to the second slot in the table (slot 1)

The above statement generated the following undo:

CHANGE #4 TYP:0 CLS:32 AFN:2 DBA:0x00800025 OBJ:4294967295 SCN:0x0000.001233e7 SEQ:  1 OP:5.1
  ktudb redo: siz: 188 spc: 1568 flg: 0x0012 seq: 0x02bc rec: 0x2a
xid:  0x0008.014.00000172
ktubl redo: slt: 20 rci: 0 opc: 11.1 objn: 52432 objd: 52432 tsn: 4
Undo type:  Regular undo        Begin trans    Last buffer split:  No
Temp Object:  No
Tablespace Undo:  No
0x00000000  prev ctl uba: 0x00800025.02bc.29
prev ctl max cmt scn:  0x0000.0012205e  prev tx cmt scn:  0x0000.00122072
txn start scn:  0x0000.00000000  logon user: 59  prev brb: 8388625  prev bcl: 0 KDO undo record:
KTB Redo
op: 0x04  ver: 0x01
op: L  itl: xid:  0x0007.00f.0000013a uba: 0x0080012d.012a.1c
flg: C---    lkc:  0     scn: 0x0000.00123473
KDO Op code: IRP row dependencies Disabled
xtype: XA flags: 0x00000000  bdba: 0x01001af0  hdba: 0x01001aeb
itli: 2  ispac: 0  maxfr: 4858
tabn: 0 slot: 1(0x1) size/delt: 19
fb: --H-FL-- lb: 0x0  cc: 3
null: ---
col  0: [ 3]  46 45 52
col  1: [ 7]  46 65 72 72 61 72 69
col  2: [ 3]  49 54 41

11.4 - Select for Update

This operation locks a row to prevent updates by other transactions

The following example was developed in Oracle 10.2.0.4 (Linux 32-bit)

Consider the following code:

CREATE TABLE team
(
  team_code    VARCHAR2(3),
  team_name    VARCHAR2(30),
  country_code VARCHAR2(3)
);

INSERT INTO team VALUES ('MCL','McLaren','GBR');
INSERT INTO team VALUES ('FER','Ferrari','ITA');

COMMIT;

The statement:

SELECT * FROM team WHERE team_code = 'FER' FOR UPDATE;

generates the following redo:

CHANGE #1 TYP:2 CLS: 1 AFN:4 DBA:0x01001af0 OBJ:52432 SCN:0x0000.00123aab SEQ:  2 OP:11.4
  KTB Redo
  op: 0x11  ver: 0x01
  op: F  xid:  0x0004.01e.00000145    uba: 0x00800725.0105.0e
  Block cleanout record, scn:  0x0000.00123b5e ver: 0x01 opt: 0x02, entries follow...
itli: 2  flg: 2  scn: 0x0000.00123aab
KDO Op code: LKR row dependencies Disabled
xtype: XA flags: 0x00000000  bdba: 0x01001af0  hdba: 0x01001aeb
itli: 1  ispac: 0  maxfr: 4858
tabn: 0 slot: 1 to: 1
KTB Redo
op: 0x011  ver: 0x01
op: F  xid:  0x0004.01e.00000145    uba: 0x00800725.0105.0e

See KTBRedo

Block cleanout record, scn:  0x0000.00123b5e ver: 0x01 opt: 0x02, entries follow...
If the ITL has not been updated out since the last transaction changes where committed or rolled back then a block cleanout is performed

scn System change number of block cleanout. Format is wrap#.base#

ver Version number

opt Option number

itli: 2  flg: 2  scn: 0x0000.00123aab

First ITL element being cleaned out - slot 2

itli ITL element number (1 based)

flg Flag

scn System Change Number of entry

KDO Op code: LKR row dependencies Disabled

LKR Operation code: Lock Row

row dependencies specifies whether row dependencies are disabled (default) or enabled for this table

xtype: XA flags: 0x00000000  bdba: 0x01001af0  hdba: 0x01001aeb

xtype transaction type. Can be XA, XR, CR or KDO_KDOM2

flags awaiting further information

bdba block DBA. Data block address of this block

hdba header DBA. Probably data block address of extent header

itli: 1  ispac: 0  maxfr: 4858

tli specifes the ITL slot number of the transaction performing the operation. In this example the row is locked by the transaction in the second ITL slot.

ispac awaiting further information

maxfr awaiting further information

tabn: 0 slot: 1 to: 1

abn specifies the table number. For non-clustered tables this will always be 0

slot specifies the slot number. Each block has an variable length array of slots. Each element in this array specifies the location of a row within the block. The first slot in the block is 0. In this example the row was written to the second slot in the table (slot 1)

to specifies whether the lock is being set (1) or released (0)

The above statement generated the following undo:

CHANGE #4 TYP:0 CLS:24 AFN:2 DBA:0x00800725 OBJ:4294967295 SCN:0x0000.00123936 SEQ:  1 OP:5.1
ktudb redo: siz: 132 spc: 4892 flg: 0x0012 seq: 0x0105 rec: 0x0e
            xid:  0x0004.01e.00000145
ktubl redo: slt: 30 rci: 0 opc: 11.1 objn: 52432 objd: 52432 tsn: 4
Undo type:  Regular undo        Begin trans    Last buffer split:  No
Temp Object:  No
Tablespace Undo:  No
             0x00000000  prev ctl uba: 0x00800725.0105.0d
prev ctl max cmt scn:  0x0000.00122231  prev tx cmt scn:  0x0000.00122236
txn start scn:  0x0000.00000000  logon user: 59  prev brb: 8388667  prev bcl: 0 KDO undo record:
KTB Redo
op: 0x04  ver: 0x01
op: L  itl: xid:  0x0001.003.00000155 uba: 0x00800688.016a.05
                      flg: C---    lkc:  0     scn: 0x0000.00123a9a
KDO Op code: LKR row dependencies Disabled
  xtype: XA flags: 0x00000000  bdba: 0x01001af0  hdba: 0x01001aeb
itli: 1  ispac: 0  maxfr: 4858
tabn: 0 slot: 1 to: 0

11.5 - Update Row Piece (URP)

This operation updates a row piece in a table

The following example was developed in Oracle 10.2.0.4 (Linux 32-bit)

Consider the following code:

CREATE TABLE team
(
  team_code    VARCHAR2(3),
  team_name    VARCHAR2(30),
  country_code VARCHAR2(3)
);


CREATE UNIQUE INDEX team_pk ON team (team_code);


INSERT INTO team VALUES ('MCL','McLaren','GBR');
INSERT INTO team VALUES ('FER','Ferrari','ITA');
INSERT INTO team VALUES ('RBR','Red Bull','RBR');

COMMIT;

Note that if there is not a unique index on this table, in Oracle 10.2.0.4 (at least) an 11.19 operation will be generated instead of a 11.5 operation.

The statement:

UPDATE team SET country_code = 'OST' WHERE team_code = 'RBR';

generates the following redo:

CHANGE #1 TYP:2 CLS: 1 AFN:4 DBA:0x01001af0 OBJ:52432 SCN:0x0000.00124511 SEQ:  1 OP:11.5
  KTB Redo
  op: 0x11  ver: 0x01
  op: F  xid:  0x0001.012.00000154    uba: 0x00800687.016a.0e
  Block cleanout record, scn:  0x0000.00124514 ver: 0x01 opt: 0x02, entries follow...
itli: 2  flg: 2  scn: 0x0000.00124511
KDO Op code: URP row dependencies Disabled
xtype: XAxtype KDO_KDOM2 flags: 0x00000080  bdba: 0x01001af0  hdba: 0x01001aeb
itli: 1  ispac: 0  maxfr: 4858
tabn: 0 slot: 5(0x5) flag: 0x2c lock: 1 ckix: 191
ncol: 3 nnew: 1 size: 0
Vector content:
col  2: [ 3]  4f 53 54
KTB Redo
op: 0x011  ver: 0x01
op: F  xid:  0x0001.012.00000154    uba: 0x00800687.016a.0e

See KTBRedo

Block cleanout record, scn:  0x0000.00124514 ver: 0x01 opt: 0x02, entries follow...
If the ITL has not been updated out since the last transaction changes where committed or rolled back then a block cleanout is performed

scn System change number of block cleanout. Format is wrap#.base#

ver Version number

opt Option number

itli: 2  flg: 2  scn: 0x0000.00124511

First ITL element being cleaned out - slot 2

itli ITL element number (1 based)

flg Flag

scn System Change Number of entry

KDO Op code: URP row dependencies Disabled

URP Operation code: Update Row Piece

row dependencies specifies whether row dependencies are disabled (default) or enabled for this table

xtype: XAxtype KDO_KDOM2 flags: 0x00000080  bdba: 0x01001af0  hdba: 0x01001aeb

xtype transaction type. Can be XA, XR, CR or KDO_KDOM2. In this case the transaction type is KDO_KDOM2. This structure can potentially store an array of change vectors for an object.

flags awaiting further information

bdba block DBA. Data block address of this block

hdba header DBA. Probably data block address of extent header

itli: 1  ispac: 0  maxfr: 4858

tli specifes the ITL slot number of the transaction performing the operation. In this example the row is locked by the transaction in the first ITL slot.

ispac awaiting further information

maxfr awaiting further information

tabn: 0 slot: 5(0x5) flag: 0x2c lock: 1 ckix: 191

abn specifies the table number. For non-clustered tables this will always be 0

slot specifies the slot number. Each block has an variable length array of slots. Each element in this array specifies the location of a row within the block. The first slot in the block is 0. In this example the row was written to the second slot in the table (slot 1)

flag awaiting further information

lock probably set to 1 indicating a lock has been taken on the row header

ckix awaiting further information

ncol: 3 nnew: 1 size: 0

ncol Number of columns in row piece

nnew Number of changed columns in row piece

size (Probably) change in size of row piece

Vector content:

Vector content: List of updated column values

col  2: [ 3]  4f 53 54

Update of column 2 (country_code) to 'OST'

The above statement generated the following undo:

CHANGE #4 TYP:0 CLS:18 AFN:2 DBA:0x00800687 OBJ:4294967295 SCN:0x0000.00124487 SEQ:  1 OP:5.1
  ktudb redo: siz: 152 spc: 6280 flg: 0x0012 seq: 0x016a rec: 0x0e
xid:  0x0001.012.00000154
ktubl redo: slt: 18 rci: 0 opc: 11.1 objn: 52432 objd: 52432 tsn: 4
Undo type:  Regular undo        Begin trans    Last buffer split:  No
Temp Object:  No
Tablespace Undo:  No
0x00000000  prev ctl uba: 0x00800687.016a.0d
prev ctl max cmt scn:  0x0000.00122c72  prev tx cmt scn:  0x0000.00122c86
txn start scn:  0x0000.00124511  logon user: 59  prev brb: 8390264  prev bcl: 0 KDO undo record:
KTB Redo
op: 0x04  ver: 0x01
op: L  itl: xid:  0x0009.005.00000195 uba: 0x0080019a.0187.19
flg: C---    lkc:  0     scn: 0x0000.00124473
KDO Op code: URP row dependencies Disabled
xtype: XAxtype KDO_KDOM2 flags: 0x00000080  bdba: 0x01001af0  hdba: 0x01001aeb
itli: 1  ispac: 0  maxfr: 4858
tabn: 0 slot: 5(0x5) flag: 0x2c lock: 0 ckix: 191
ncol: 3 nnew: 1 size: 0
Vector content:
col  2: [ 3]  47 42 52

11.11 - Array Insert

This operation inserts a set of rows into a table

The following example was developed in Oracle 10.2.0.4 (Linux 32-bit)

Consider the following code:

CREATE TABLE team
(
  team_code    VARCHAR2(3),
  team_name    VARCHAR2(30),
  country_code VARCHAR2(3)
);

INSERT INTO team VALUES ('MCL','McLaren','GBR');
INSERT INTO team VALUES ('FER','Ferrari','ITA');
COMMIT;


CREATE TABLE team2
(
  team_code    VARCHAR2(3),
  team_name    VARCHAR2(30),
  country_code VARCHAR2(3)
);

INSERT INTO team2 VALUES ('BMW','BMW','GER');
INSERT INTO team2 VALUES ('WIL','Williams','GBR');
INSERT INTO team2 VALUES ('REN','Renault','REN');

COMMIT;

The statement:

INSERT INTO team SELECT * FROM team2;

generates the following redo:

CHANGE #3 TYP:2 CLS: 1 AFN:4 DBA:0x01001b14 OBJ:52798 SCN:0x0000.00157cf0 SEQ:  1 OP:11.11
KTB Redo
op: 0x01  ver: 0x01
op: F  xid:  0x0007.01c.0000014c    uba: 0x00800fc7.012f.14
KDO Op code: QMI row dependencies Disabled
xtype: XA flags: 0x00000000  bdba: 0x01001b14  hdba: 0x01001b13
itli: 2  ispac: 0  maxfr: 4858
tabn: 0 lock: 2 nrow: 3
slot[0]: 2
tl: 15 fb: --H-FL-- lb: 0x0  cc: 3
col  0: [ 3]  42 4d 57
col  1: [ 3]  42 4d 57
col  2: [ 3]  47 45 52
slot[1]: 3
tl: 20 fb: --H-FL-- lb: 0x0  cc: 3
col  0: [ 3]  57 49 4c
col  1: [ 8]  57 69 6c 6c 69 61 6d 73
col  2: [ 3]  47 42 52
slot[2]: 4
tl: 19 fb: --H-FL-- lb: 0x0  cc: 3
col  0: [ 3]  52 45 4e
col  1: [ 7]  52 65 6e 61 75 6c 74
col  2: [ 3]  52 45 4e
KTB Redo
op: 0x01  ver: 0x01
op: F  xid:  0x0007.01c.0000014c    uba: 0x00800fc7.012f.14

See KTBRedo

KDO Op code: QMI row dependencies Disabled

QMI Operation code: Insert array of rows

row dependencies specifies whether row dependencies are disabled (default) or enabled for this table

xtype: XA flags: 0x00000000  bdba: 0x01001b14  hdba: 0x01001b13

xtype transaction type. Can be XA, XR, CR or KDO_KDOM2

flags awaiting further information

bdba block DBA. Data block address of this block

hdba header DBA. Probably data block address of extent header

itli: 2  ispac: 0  maxfr: 4858

itli specifes the ITL slot number of the transaction performing the operation. In this example the row is locked by the transaction in the second ITL slot.

ispac awaiting further information

maxfr awaiting further information

tabn: 0 lock: 2 nrow: 3

tabn specifies the table number. For non-clustered tables this will always be 0

lock possibly ITL slot holding the lock

nrow number of rows

slot[0]: 2

first row

tl: 15 fb: --H-FL-- lb: 0x0  cc: 3

tl total length (15 bytes = 3 bytes header + 3 length bytes + 9 data bytes)

fb flag byte

lb lock byte - rows locked in table header on this block only

cc column count

col  0: [ 3]  42 4d 57

Row 0 Column 0 - 3 bytes - BMW

col  1: [ 3]  42 4d 57

Row 0 Column 1 - 3 bytes - BMW

col  2: [ 3]  47 45 52

Row 0 Column 2 - 3 bytes - GER

slot[1]: 3

second row

tl: 20 fb: --H-FL-- lb: 0x0  cc: 3

tl total length (20 bytes = 3 bytes header + 3 length bytes + 14 data bytes)

fb flag byte

lb lock byte - rows locked in table header on this block only

cc column count

col  0: [ 3]  57 49 4c

Row 1 Column 0 - 3 bytes - WIL

col  1: [ 8]  57 69 6c 6c 69 61 6d 73

Row 1 Column 1 - 8 bytes - Williams

col  2: [ 3]  47 42 52

Row 1 Column 2 - 3 bytes - GBR

slot[2]: 4

third row

tl: 19 fb: --H-FL-- lb: 0x0  cc: 3

tl total length (19 bytes = 3 bytes header + 3 length bytes + 13 data bytes)

fb flag byte

lb lock byte - rows locked in table header on this block only

cc column count

col  0: [ 3]  52 45 4e

Row 2 Column 0 - 3 bytes - REN

col  1: [ 7]  52 65 6e 61 75 6c 74

Row 2 Column 1 - 7 bytes - Renault

col  2: [ 3]  52 45 4e

Row 2 Column 2 - 3 bytes - FRA

The above statement generated the following undo:

CHANGE #2 TYP:0 CLS:30 AFN:2 DBA:0x00800fc7 OBJ:4294967295 SCN:0x0000.00157d25 SEQ:  1 OP:5.1
ktudb redo: siz: 140 spc: 5916 flg: 0x0012 seq: 0x012f rec: 0x14
            xid:  0x0007.01c.0000014c
ktubl redo: slt: 28 rci: 0 opc: 11.1 objn: 52798 objd: 52798 tsn: 4
Undo type:  Regular undo        Begin trans    Last buffer split:  No
Temp Object:  No
Tablespace Undo:  No
             0x00000000  prev ctl uba: 0x00800fc7.012f.05
prev ctl max cmt scn:  0x0000.0015760e  prev tx cmt scn:  0x0000.00157655
txn start scn:  0xffff.ffffffff  logon user: 59  prev brb: 8392639  prev bcl: 0 KDO undo record:
KTB Redo
op: 0x03  ver: 0x01
op: Z
KDO Op code: QMD row dependencies Disabled
  xtype: XA flags: 0x00000000  bdba: 0x01001b14  hdba: 0x01001b13
itli: 2  ispac: 0  maxfr: 4858
tabn: 0 lock: 0 nrow: 3
slot[0]: 2
slot[1]: 3
slot[2]: 4

11.12 - Array Delete (undo only)

This operation deletes a set of rows from a table. Apparently this operation is only called by undo as the inverse operation to the 11.11 Array Insert operation.

11.19 - Array Update

This operation updates a set of rows into a table

For example:

CHANGE #1 TYP:0 CLS:1 AFN:4 DBA:0x01000c15 OBJ:79792 SCN:0x0000.003ddd32 SEQ:1 OP:11.19 ENC:0 RBL:0
KTB Redo
op: 0x11  ver: 0x01
compat bit: 4 (post-11) padding: 1
op: F  xid:  0x0002.012.0000075e    uba: 0x00c00703.035b.2e
Block cleanout record, scn:  0x0000.003ddd7e ver: 0x01 opt: 0x02, entries follow...
  itli: 2  flg: 2  scn: 0x0000.003ddd31
Array Update of 3 rows:
tabn: 0 slot: 59(0x3b) flag: 0x2c lock: 3 ckix: 0
ncol: 12 nnew: 1 size: 0
KDO Op code:  21 row dependencies Disabled
  xtype: XAxtype KDO_KDOM2 flags: 0x00000080  bdba: 0x01000c15  hdba: 0x01000c0a
itli: 3  ispac: 0  maxfr: 4858
vect = 35
col 11: [ 2]  c1 0c
tabn: 0 slot: 60(0x3c) flag: 0x2c lock: 3 ckix: 0
ncol: 12 nnew: 1 size: 0
KDO Op code:  21 row dependencies Disabled
  xtype: XAxtype KDO_KDOM2 flags: 0x00000080  bdba: 0x01000c15  hdba: 0x01000c0a
itli: 3  ispac: 0  maxfr: 4858
vect = 35
col 11: [ 2]  c1 0a
tabn: 0 slot: 61(0x3d) flag: 0x2c lock: 3 ckix: 0
ncol: 12 nnew: 1 size: 0
KDO Op code:  21 row dependencies Disabled
  xtype: XAxtype KDO_KDOM2 flags: 0x00000080  bdba: 0x01000c15  hdba: 0x01000c0a
itli: 3  ispac: 0  maxfr: 4858
vect = 35
col 11: [ 2]  c1 08

The above change updates three rows in the same block

The change includes the new values. The old values are includes in the undo change which follows:

CHANGE #4 TYP:0 CLS:20 AFN:3 DBA:0x00c00703 OBJ:4294967295 SCN:0x0000.003ddd2d SEQ:1 OP:5.1 ENC:0 RBL:0
ktudb redo: siz: 248 spc: 3228 flg: 0x0012 seq: 0x035b rec: 0x2e
            xid:  0x0002.012.0000075e
ktubl redo: slt: 18 rci: 0 opc: 11.1 [objn: 79792 objd: 79792 tsn: 4]
Undo type:  Regular undo        Begin trans    Last buffer split:  No
Temp Object:  No
Tablespace Undo:  No
             0x00000000  prev ctl uba: 0x00c00703.035b.2d
prev ctl max cmt scn:  0x0000.003c9962  prev tx cmt scn:  0x0000.003c996c
txn start scn:  0x0000.003ddd78  logon user: 85  prev brb: 12584704  prev bcl: 0 BuExt idx: 0 flg2: 0
KDO undo record:
KTB Redo
op: 0x03  ver: 0x01
compat bit: 4 (post-11) padding: 1
op: Z
Array Update of 3 rows:
tabn: 0 slot: 59(0x3b) flag: 0x2c lock: 0 ckix: 0
ncol: 12 nnew: 1 size: 0
KDO Op code:  21 row dependencies Disabled
  xtype: XAxtype KDO_KDOM2 flags: 0x00000080  bdba: 0x01000c15  hdba: 0x01000c0a
itli: 3  ispac: 0  maxfr: 4858
vect = 35
col 11: [ 2]  c1 0b
tabn: 0 slot: 60(0x3c) flag: 0x2c lock: 0 ckix: 0
ncol: 12 nnew: 1 size: 0
KDO Op code:  21 row dependencies Disabled
  xtype: XAxtype KDO_KDOM2 flags: 0x00000080  bdba: 0x01000c15  hdba: 0x01000c0a
itli: 3  ispac: 0  maxfr: 4858
vect = 35
col 11: [ 2]  c1 09
tabn: 0 slot: 61(0x3d) flag: 0x2c lock: 0 ckix: 0
ncol: 12 nnew: 1 size: 0
KDO Op code:  21 row dependencies Disabled
  xtype: XAxtype KDO_KDOM2 flags: 0x00000080  bdba: 0x01000c15  hdba: 0x01000c0a
itli: 3  ispac: 0  maxfr: 4858
vect = 35
col 11: [ 2]  c1 07

The undo change contains the old values for the columns

The maximum number of rows updated in a single change appears to be 20. If more than 20 rows are updated in the same block, then multiple 20-row changes are created.