Re: Read IFS file using SQL -- RPG400-L

Thanks Birgitta,
As always, when it comes to SQL, you are the best.

Jeff Young
Sr. Programmer Analyst

On Fri, Jun 30, 2017 at 11:46 AM, Birgitta Hauser <Hauser@xxxxxxxxxxxxxxx>
wrote:

Accessing the IFS, reading and writing data from and to the IFS with SQL
and
RPG is not very well documented.
You need to define a file reference variable (which is converted by the
precompiler into a data structure).
You need to initialize the data structure subfields with the IFS-File-Name,
the length of the IFS-File-Name and the file operation (SQFRD = Read Only,
SQFCRT=Create, SQFOVR=Override, SQFAPP=Append).
Now you can read or manipulate the IFS file with SQL functions like any
character variable.

Some documentation can be found under the following link:
https://www.ibm.com/support/knowledgecenter/ssw_ibm_i_73/
rzajp/rzajpirpglobf
ileref.htm

Here is a simple example how to write to the IFS:

DCL-S ParIFSFile VarChar(256) inz('/home/Hauser/MyIFSFile.Txt');

DCL-S LocClobFile SQLTYPE(Clob_File);
DCL-S CRLF Char(2) inz(x'0D25');

//----------------------------------------------------------
----------------
--
Clear LocClobFile;

LocClobFile_Name = %Trim(ParIFSFile);

LocClobFile_NL = %Len(%Trim(LocClobFile_Name));

LocClobFile_FO = SQFOVR; //Create / Override existing IFS File

Exec SQL Set :LocClobFile = 'Always desire to learn something useful.'

concat :CRLF;

LocClobFile_FO = SQFAPP; //Add Data

Exec SQL Set :LocClobFile = 'Success has a simple formula: ' concat

'do your best, and people may like it. '

concat :CRLF;

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 [mailto:rpg400-l-bounces@xxxxxxxxxxxx] On Behalf Of Jeff
Young
Sent: Freitag, 30. Juni 2017 15:34
To: rpg400-l@xxxxxxxxxxxx
Subject: Read IFS file using SQL

All,
I have seen references here recently and in the past regarding using SQL to
read /Write files (tables) residing on the IFS, but can not find anything
in the IBM reference manuals.
I am working with systems on 7.2.

Can someone point me to the appropriate manual or link on how to do this?

I am very comfortable working with SQL and even the Unix/C procedures for
accessing the IFS in RPGLE.

Jeff Young
Sr. Programmer Analyst
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