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OpenVMS Hobbyist Program | Hobbyists and OpenVMS | How I Use OpenVMS
Author How can I create and write to an indexed file and then read from it in DCL?
JonathanBelanger
Member

Posts: 38
Joined: 09.06.16
Posted on August 01 2016 13:02
Hi All,

Let's see if someone can help me. I want to create an empty indexed file that contains an integer key with the name LINE and a text string with up to 1024 bytes. I figure I'm going to have to use the CREATE command with the /FDL qualifier, but cannot figure out how to do this. I then want to be able to use the WRITE command to right a record to this indexed file. How do you specify the INDEX or KEY to the write command? Fortunately, I'm going to be writing records that start with a key of 1, then 2, then 3, and so forth and so on. I will then close this file and then use read/key (or read/index, which ever is the correct one) to read the line I need from this index file. I may read 100 records and then want to go back and read starting from the 10th record, and possibly skipping around the file. I want to do this in DCL. Any help would be appreciated.

~Jon.
Author RE: How can I create and write to an indexed file and then read from it in DCL?
Bruce Claremont
Member

Posts: 506
Joined: 07.01.10
Posted on August 03 2016 03:57
Look at EDIT/FDL to create the indexed file definition.

The key is determined by its position in the record. No key qualifier is needed on a WRITE command.

You'll want to review OPEN, CLOSE, READ, WRITE, EDIT/FDL, and CREATE/FDL in the DCL manual.
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malmberg
June 26 2018
https://www.openvmshobbyi
st.com/forum/viewthread.p
hp?forum_id=10&thread_id=
2363


bhamakripa
June 24 2018
I am trying OpenVMS via SIMH. Need to get OS binaries for v7.3. Registered here but don't have any membership number yet which is needed to get license. Pls suggest what to do. I hardly know anyth

basilh
June 05 2018
Any other forum members in Perth, Australia?

LouF91
April 05 2018
ah maybe they love that!

malmberg
March 24 2018
Probably. More people hang out on the comp.os.vms newsgroup.

vaxpert
March 23 2018
I have a PE42A and other Alpha system stuff for sale. I'm in So California. Any interest out there?

goodbyespy
February 27 2018
To Prohorenko. Please, visit group OpenVMS in the ok.ru

peteherrera
February 24 2018
How much does it cost to buy a complete OpenVMS hardcopy documentation set of the latest version

prohorenko
February 17 2018
Please help to obtain the license on OpenVMS

malmberg
December 12 2017
HPE only makes the most current version of OpenVMS Alpha / IA64 /VAX available to hobbyists. When I had access to the Alliance 1 program it was the same. No public downloads are allowed by HPE.

nmbonao
December 08 2017
Is anybody knows OpenVMS 8.2 version downloadable version? or CD copy? Thank you very much

aarommes
December 02 2017
Bitcoin and Blockchain enthusiasts ( plus distributed computing ) please connec / reply: http://www.openvmshobbyis
t.com/forum/viewthread.ph
p?forum_id=130&thread_id=
2991


malmberg
September 10 2017
https://sourceforge.net/p
/vms-ports/wiki/VMSInstal
lation/ For the most part just use VMS 6.1 media instead of 7.3. But why run the older release?


DoeveR
August 07 2017
Where can I find the write up on running VMS 6.1 using the simh emulator?

Bart
March 20 2017
Happy to have found my password again!

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