Redo Level 11 - Table Operation (DML)

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

• 11.2 - Insert Row Piece (IRP)
• 11.3 - Delete Row Piece (DRP)
• 11.4 - Select for Update
• 11.5 - Update Row Piece (URP)
• 11.11 - Array Insert
• 11.12 - Array Delete (undo only)

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

 CodeMnemonicDescription11.1IURUndo11.2IRPInsert Row Piece11.3DRPDelete Row Piece11.4LKRLock Row11.5URPUpdate Row Piece11.6ORPOverflow Row Piece11.7MFC 11.8CFA 11.9CKI 11.10SKL 11.11QMIInsert Row Array11.12QMDDelete Row Array11.14DSC 11.16LMN 11.17LLB 11.1919Update Row Array11.20SHK 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:

• 3 bytes for the row header
• 4 bytes for column 0 (1 length byte and 3 data bytes)
• 8 bytes for column 1 (1 length byte and 7 data bytes)
• 4 bytes for column 2 (1 length byte and 3 data bytes)

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

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

 FlagDescriptionKCluster keyCClustered rowHHead piece of rowDDeleted rowFFirst piece in rowLLast piece in rowPPrevious row piece existsNNext 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.