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Data change header description record (XHDF)


The logical log contains one instance of the Data Change Header Record for every header field in the data change record of the logical log data set. It describes the format of each header field in the change record to allow a program to process the change records.

For more information, see Logical-log-data-file.

Record status: Platform independent

Field name

Offset

Definition

Description

Dec

Hex

CNTLRECORDTYPE

00

00

CHAR(4)

Control record type: XHDF - Data Change Header Description Record

HEADFIELDNAME

04

04

CHAR(18)

Name of this header field

HEADFIELDTYPE

22

16

CHAR(4)

Type of data in this field:

BIN - binary / hexadecimal

CHAR - character

INT - integer (length is 2 or 4)

DTTM - timestamp value (length is 26)

HEADFIELDSUBTYPE

26

1A

CHAR(1)

Format of data within type:

U - unsigned format (BIN subtype)

No subtype exists for CHAR, INT, or DTTM

HEADFIELDLEN

27

1B

CHAR(5)

Length of this header field

HEADFIELDPOS

32

20

CHAR(5)

Offset of this field in the logical log data change record

(Total Length)

37

25

Not applicable

Not applicable


 

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BMC AMI Log Master for Db2 13.1