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what is the meaning of currency ???
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Answer / rohit
Currency in IDMS is your current location in database.
To help keep track of where we are in the database, IDMS/R
maintains pointers to a number of different record
occurrences as each run unit executes. We use the term
currency to refer to these pointers.
To enable a program to position itself and move about in
the database, IDMS/R maintains a Currency Table for each
run unit.
The currency is the db-key of the most recently accessed
record occurrence.
IDMS/R maintains four types of currency (Currency Table)
for each run unit:
? Record Currency (Current of record type). The db-
key of the most recent record occurrence of each record
type accessed by the program. IDMS/R maintains a separate
currency for each record type defined in the subschema.
? Set Currency (Current of set type). The db-key of
the most recent record occurrence of each set type accessed
by the program. IDMS/R maintains a separate currency for
each set type defined in the subschema.
? Area Currency (Current of area). The db-key of the
most recent record occurrence of each area accessed by the
program. IDMS/R maintains a separate currency for each area
to which the program has access.
? Run Unit Currency (Current of run unit). The db-key
of the most recent record occurrence accessed by the
program.
| Is This Answer Correct ? | 20 Yes | 3 No |
Answer / rajashree pattar
Currency is the DB-key of most recently accessed record
occurence. It keeps track of where we are in the database.
| Is This Answer Correct ? | 4 Yes | 3 No |
Answer / rams
In IDMS all of your data will be stored in records and each
record is accessed with one unique key called CALC key. If
you access one particular record by using its unique CALC
key that means you are CURRENTLY have that records data b
ut that data will be with you until you didnt traverse any
other records and modify other records,you will have
authority on the data of that record. this property in IDMS
terminology is called as CURRENCY.
| Is This Answer Correct ? | 1 Yes | 9 No |
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