What do you know about DBD gen?
- 4 Answers
- 14467 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 will happens when a BMP programs takes a checkpoints?
What is batch dl/i mode?
What do you know about DBD gen?
What is the difference between HDAM & HIDAM DB types and when would you use each?
What is check pointing, sync point?
Is it necessary that all the segments in a Dl/i database have key fields ?
abt ssa.purpose of ssa
What is acbgen process?
What is dbd?
What are the two ways in which dl/i interface can be invoked?
Explain the maximum number of fields allowed per segment and what is the maximum number of fields per database?
What information does a dbd contain?
COBOL 
