Use the Segment Data panel
to update contents of the database segment data.
Procedure
Select option D in the Segment Prefix panel to display the
Segment Data
panel.
The default view of this panel shows the segment data in hex (dump) format. You can change the
view to show the same data in character format. The character format, which is the readable format,
helps you to verify the contents of the database segment. After you determine that the segment you
are viewing is the segment you want to modify, you can switch back to the hex format panel to make
the change.
The first few lines on this panel provide information that identifies the database, data set, and
segment. The lower part of the panel consists of the segment data. A ruler (Ofst 0...2...) helps you
to read the pointers and data. The data is displayed below the ruler. You can overwrite the data if
you want to repair the data. Press Enter to accept your changes.
Restriction: Keys cannot be overwritten. If you attempt to do
so, a message is displayed; this message not only indicates that you attempted a prohibited
operation, but it also explains where the key fields are. An example of this message is as follows:
FABZ034W: KEY FIELD STARTING AT OFFSET 32 AND ENDING AT OFFSET 3B CANNOT BE MODIFIED.
If
you try to change key and data on the same line, none of the changes are applied. You must reenter
the data changes after the message is displayed.
Figure 1. Segment Data panel in hex format
Segment Data
Option ===>
S Show data in characters.
Update highlighted fields, ENTER to commit changes in DB. END to exit
DBD: SMPORDP1 DSG: 01 DBORG: HIDAM DSORG: OSAM Blk addr: X'2000'
DS name: IDL.DB.SMPORD1P.HIDAM.OSAM
SC : 01 Name: SMP00210 RBA: 00002004 >4G: N Keyofst: 32 Keylen: 10
Key: 0000000001
Data offset: 0032 Length: 340 Type: Fixed
Ofst 0.1.2.3. 4.5.6.7. 8.9.A.B. C.D.E.F. 0.1.2.3. 4.5.6.7. 8.9.A.B. C.D.E.F.
0020 F0F0 F0F0F0F0 F0F0F0F1 40E3C5E2
0040 E340C4C1 E3C140F0 F0F0F0F1 40404040 40404040 40404040 40404040 40404040
0060 40404040 40404040 40404040 40404040 40404000 00000000 01008800 0E000040
0080 4CC9D5C6 D6D9D4C1 E3C9D6D5 6E404040 4040C7D3 D6C24040 40404040 40404040
00A0 40404040 40404040 40404040 40404040 40404040 40404040 40404040 40404040
.
.
Figure 2. Segment Data panel in character and hex format
Segment Data
Option ===>
S Show data in hex.
Update highlighted fields, ENTER to commit changes in DB. END to exit
DBD: SMPORDP1 DSG: 01 DBORG: HIDAM DSORG: OSAM Blk addr: X'2000'
DS name: IDL.DB.SMPORD1P.HIDAM.OSAM
SC : 01 Name: SMP00210 RBA: 00002004 >4G: N Keyofst: 32 Keylen: 10
Key: 0000000001
Data offset: 0032 Length: 340 Type: Fixed
Ofst 0.1.2.3. 4.5.6.7. 8.9.A.B. C.D.E.F. 0.1.2.3. 4.5.6.7. 8.9.A.B. C.D.E.F.
0020 0 0 0 0 0 0 0 0 0 1 T E S
F0F0 F0F0F0F0 F0F0F0F1 40E3C5E2
0040 T D A T A 0 0 0 0 1
E340C4C1 E3C140F0 F0F0F0F1 40404040 40404040 40404040 40404040 40404040
0060 H
40404040 40404040 40404040 40404040 40404000 00000000 01008800 0E000040
0080 < I N F O R M A T I O N > G L O B
4CC9D5C6 D6D9D4C1 E3C9D6D5 6E404040 4040C7D3 D6C24040 40404040 40404040
00A0
40404040 40404040 40404040 40404040 40404040 40404040 40404040 40404040
.
.
This panel contains the following fields:
Option
Enter an S to switch between the hex-only format and character and hex
formats.
DBD
The name of the database, or for a partitioned database, the name of the
partition.
DSG
The data set group number or, for a DEDB, the area number.
DBORG
The database organization type.
DSORG
The organization type of the data set.
Blk addr or CI addr
The address of the block or control interval.
DS name
The name of the data set.
SC
The segment code.
Name
The segment name.
RBA
The relative byte address of the segment.
>4G
N
Indicates that the segment is in the first 4 GB of the database.
Y
Indicates that the segment is in the second 4 GB of an OSAM database.
Keyofst
The offset of the key that is used to access the segment.
Keylen
The key length.
Key
The key that is used to access the segment.
Offset
The offset of the data from the beginning of the segment.
Length
The length of the displayed data.
Type
The data type, which can be one of the following types:
Fixed
Variable
Variable split
What to do next
Use PF3 to return to previous menus.
Important: Be sure to run the Pointer Checker utility after
you change data or pointers. If errors are found, restart IMS Database
Repair Facility and immediately select
option 3. Undo changes from
the Main menu.
The changes that you made are recorded in the Undo file until you
select option 2. View/Update database the
next time.