The Question is:
I am using alpha open vms ver 6.1. I have a signed numeric field that is a key
field in a file. I have tried to create a FDL for the file, but it is saying
that it is a string in the type. This needs to be defined as signed numeric.
What is the type f
The Answer is :
> I have a signed numeric field that is a key field in a file.
From what perspective is it a signed numeric field?
When it comes down to the bits in memory, what does it look like?
For example in COBOL a field declared just as S9999 may be called
signed number but in memory, and for RMS, is is just a piece of
string which happens to have a restricted series of characters (0 - 9)
Now if you add a COMP clause to that cobol, you can turn the bit-
pattern into PACKED DECIMAL or a BINARY INTEGER. For those RMS has
corresponding defintions see the KEY TYPE table in section 4.8 in
the RMS Utilities Manual:
For example the entry for INT4 reads: "A signed, 4-byte integer; this data
type can represent integers between --2,147,483,648 and+2,147,483,647. "
Defining it as string may well be correct, even though you know that
string itself contains just numbers... rms does not need to know that.