I have read the answers and the documentation and I disagree with your
assessment of my problem. Since I don't know the file or fields in advance,
using set descriptor means that I have to change the field definition of
every field that I am retrieving to make it work. That leads to a lot of
convoluted code.
for fieldno = 1 to numColumns
select
when fieldtype = character
set descriptor local :descName
value :fieldno
length = 32000;
when fieldtype = numeric
set descriptor local :descName
value :fieldno
length = x;
when fieldtype = decimal
set descriptor local :descName
value :fieldno
length = x,x; <== I didn't look this up
endsl;
endfor;
And, if I make it completely generic as requested, I have to include a
similar block of code for all of these types too.
BIGINT
VARCHAR(n)
DATE (DATETIME_INTERVAL_CODE = 1)
TIME (DATETIME_INTERVAL_CODE = 2)
TIMESTAMP (DATETIME_INTERVAL_CODE = 3)
BINARY(n)
VARBINARY(n)
DOUBLE PRECISION
FLOAT
INTEGER
ZONED DECIMAL(n)
REAL
ROWID
SMALLINT
Have I missed something in the answers or documentation?
-----Original Message-----
From: RPG400-L [mailto:rpg400-l-bounces@xxxxxxxxxxxx] On Behalf Of D*B
Sent: Monday, September 4, 2017 1:06 PM
To: RPG programming on the IBM i / System i <rpg400-l@xxxxxxxxxxxx>
Subject: Re: Building dynamic SQL with descriptors
<John>
I really can't believe IBM didn't take that last step to figure out how to
put values from the descriptor into a generic sized variable. Let me define
variables of 32K (or whatever) for chars, 13,15 for decimals, etc. and be
able to use them generically.
</John>
Why don't you read the answers? That's what "SET DESCRIPTOR" is made for!!!
D*B
PS: the problem is not dynamic allocating memory! The problem is to bring
data of one type to another type with a language ("RPG") which is dealing
under the coever with binary data.
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