Interested to Buy Any Domain ? << Click Here >> for more details...
What do you know about DBD gen?
- 4 Answers
- 16604 Views
- I also Faced
- E-Mail Answers
Answers were Sorted based on User's Feedback
Answer / rama krishna
DBDGEN means Database Descriptor Generator which is used to
define the IMS database. While declaring the DBD, we are
going to declare all the segments and the parent and child
relationship among them and the fields in each segment and
their properties.
| Is This Answer Correct ? | 12 Yes | 1 No |
Answer / nygrande
DBDGEN control statements consists of Assembler Language
macro statements. The macros are supplied by IBM in a
library named IMSVS.MACLIB. DBDGEN control statements are
normally coded by the DBA and submitted to the system with
JCL. That invokes a cataloged procedure usually called
DBDGEN. The DBDGEN procedure causes the DBDGEN control
statements to the processed by the assembler producing the
object module. The object module is then passed to the
linkage editor which, in turn, stores a load module in
another IMS Library called as IMS.DBDLIB or IMSVS.DBDLIB.
The DBD process is normally preformed only once for a
database. All applications use the DBD in accessing the
information on the database. A new DBD is normally created
only if the physical nature of the database changes.
| Is This Answer Correct ? | 4 Yes | 0 No |
Answer / techy
Sameple Data Base Descriptor Generator :
PRINT NOGEN
DBD NAME=VENDOR,ACCESS=HDAM
DATASET DD1=VEND,DEVICE=3380
SEGM NAME=VENSEG,PARENT=0,BYTES=10
FIELD NAME=(VENCODE,SEQ,U),BYTES=10,START=1,TYPE=C
SEGM NAME=ITEMSEG,PARENT=VENSEG,BYTES=5
FIELD NAME=(ITEMCODE,SEQ,U),BYTES=5,START=1,TYPE=C
SEGM NAME=LOCNSEG,PARENT=ITEMSEG,BYTES=9
FIELD NAME=(LOCNCODE,SEQ),BYTES=3,START=1,TYPE=C
FIELD NAME=ORDDATE,BYTES=6,START=4,TYPE=C
DBDGEN
FINISH
END
| Is This Answer Correct ? | 4 Yes | 1 No |
Answer / deepak
Key field - used to uniquely identify the records in the
segment
| Is This Answer Correct ? | 2 Yes | 10 No |
what are the control blocks in IMS ?
What are the path calls in imsdb?
What type of pointers should you specify on the root segment of a HIDAM DB to improve sequential processing?
Is it necessary that all the segments in a Dl/i database have key fields ?
What is secondary indexing?
Explain the advantage of creating the acbs well ahead of time?
Which is the DL/I function used in CICS-IMS program? IBM
Explain the processing modes available in ims db?
What is the difference between SIBLINGS and TWINS in IMS-DB database
What are common status codes that you come across?
How can we distinguish between an online and batch program in IMS environment?
What is bmp mode?
COBOL 
