RE: Declaring datastructure for variable file..

If you only want to create JSON from a file, you should use SQL.

Sometimes ago I made some SQL Functions OpenSource
(https://github.com/BirgittaHauser/Generate-XML-and-JSON)
You may have a look on it, may be you can use the SQL functions in your
embedded SQL.
TABLE2JSON converts the content of a table into JSON
SQL2JSON converts the result of a SELECT Statement into JSON

Mit freundlichen Grüßen / Best regards

Birgitta Hauser

"Shoot for the moon, even if you miss, you'll land among the stars." (Les
Brown)
"If you think education is expensive, try ignorance." (Derek Bok)
"What is worse than training your staff and losing them? Not training them
and keeping them!"
?Train people well enough so they can leave, treat them well enough so they
don't want to.? (Richard Branson)


-----Original Message-----
From: RPG400-L <rpg400-l-bounces@xxxxxxxxxxxxxxxxxx> On Behalf Of Robert
Rogerson
Sent: Montag, 1. Juli 2019 22:02
To: RPG programming on IBM i <rpg400-l@xxxxxxxxxxxxxxxxxx>
Subject: Re: Declaring datastructure for variable file..

@Dave, I'll look into the DESCRIPTORS in sql.
@Charles. The purpose is to create a JSON document where the in the format

{
"FILENAME1 ": [

{"col1": "col1 data"},
{"col2": "col2 data"}
]

}

The challenge is that FILENAME1 is not know until run time.

Any thoughts or admise would be appreciated.

Thanks,

Rob


On Mon, Jul 1, 2019 at 3:20 PM <dlclark@xxxxxxxxxxxxxxxx> wrote:

"RPG400-L" <rpg400-l-bounces@xxxxxxxxxxxxxxxxxx> wrote on 07/01/2019
02:26:16 PM:

I'm creating procedure where I want to pass the file name to the
procedure. So my file declaration in the procedure is...
dcl-f infile disk usropn extfile(pFileIn);

Now when I want to read the file as it's in a procedure I must use a

data

structure. How do I define the data structure as the file is
unknown at compile time. I'm thing something like...

dcl-ds inFileDs extname(pFileIn) end-ds; But it gives me
RNF3523: External description INFILEDATA for data structure is not

found;

data structure is ignored.
RNF3608: The parameter for the EXTNAME or EXTFLD keyword must be a
character literal or constant.

How should I be defining this?

If you really want to use "standard" RPG for this type of
access then you would have to create an open data structure (i.e.,
with no
subfields) and parse it out yourself using %substr. But then you
would have to know the file layout ahead of time, too -- or use an API
to get the equivalent of DSPFFD. Alternatively, SQL has DESCRIPTORS
to get the column definitions.


Sincerely,

Dave Clark
--
int.ext: 91078
direct: (937) 531-6378
home: (937) 751-3300

Winsupply Group Services
3110 Kettering Boulevard
Dayton, Ohio 45439 USA
(937) 294-5331

Thanks,

Rob
--
This is the RPG programming on IBM i (RPG400-L) mailing list To post
a message email: RPG400-L@xxxxxxxxxxxxxxxxxx To subscribe,
unsubscribe, or change list options,
visit: https://urldefense.com/v3/__https://lists.midrange.com/
mailman/listinfo/rpg400-l__;!s27icpZD2fbA_A!
MkKppGnwAoTf7X4MUGG87i8PYhG_IraFw330A1_Jm1n66a3RiulJRogUeYLaB7HvXQU$
or email: RPG400-L-request@xxxxxxxxxxxxxxxxxx
Before posting, please take a moment to review the archives at
https://urldefense.com/v3/__https://archive.midrange.com/rpg400-
l__;!s27icpZD2fbA_A!
MkKppGnwAoTf7X4MUGG87i8PYhG_IraFw330A1_Jm1n66a3RiulJRogUeYLacMYGhVM$ .

Please contact support@xxxxxxxxxxxx for any subscription related

questions.

Help support midrange.com by shopping at amazon.com with our
affiliate

link:

https://urldefense.com/v3/__https://amazon.midrange.com__;!
s27icpZD2fbA_A!
MkKppGnwAoTf7X4MUGG87i8PYhG_IraFw330A1_Jm1n66a3RiulJRogUeYLala07x6Q$

**********************************************************************
*********************** This email message and any attachments is for
use only by the named
addressee(s) and may contain confidential, privileged and/or
proprietary information. If you have received this message in error,
please immediately notify the sender and delete and destroy the
message and all copies. All unauthorized direct or indirect use or
disclosure of this message is strictly prohibited. No right to
confidentiality or privilege is waived or lost by any error in

transmission.

**********************************************************************
***********************
--
This is the RPG programming on IBM i (RPG400-L) mailing list To post a
message email: RPG400-L@xxxxxxxxxxxxxxxxxx To subscribe, unsubscribe,
or change list options,
visit: https://lists.midrange.com/mailman/listinfo/rpg400-l
or email: RPG400-L-request@xxxxxxxxxxxxxxxxxx
Before posting, please take a moment to review the archives at
https://archive.midrange.com/rpg400-l.

Please contact support@xxxxxxxxxxxx for any subscription related
questions.

Help support midrange.com by shopping at amazon.com with our affiliate
link: https://amazon.midrange.com

--
This is the RPG programming on IBM i (RPG400-L) mailing list To post a
message email: RPG400-L@xxxxxxxxxxxxxxxxxx To subscribe, unsubscribe, or
change list options,
visit: https://lists.midrange.com/mailman/listinfo/rpg400-l
or email: RPG400-L-request@xxxxxxxxxxxxxxxxxx
Before posting, please take a moment to review the archives at
https://archive.midrange.com/rpg400-l.

Please contact support@xxxxxxxxxxxx for any subscription related questions.

Help support midrange.com by shopping at amazon.com with our affiliate link:
https://amazon.midrange.com