Re: Null fields in SQLRPGLE.

["David Morris" <dmorris@xxxxxxxxxxxxx>]

Facchinetti,

The only way to do this with embedded SQL is to use an SQLDA.  The 
example I referred you to can be used to accomplish this.  That program 
assumes you would want this to be a contiguous structure.  You could 
modify it to support any type of space you would like, even non-contiguous 
space.  IE: You could add a procedure that does supports something like:

IF GetNullInd(field1)
do something
ENDIF

To accomplish this just compare the passed address to the field address 
in the SQLDA and if it matches return the corresponding null indicator. 
If you are really interested, I could code a routine to do this for you and 
add it to the example I pointed you to.

David Morris

>>> facchinetti@yahoo.com 10/05/00 04:44AM >>>
I understand your suggestion but my purpose is to get the
ability to chain the sql "nullind" to a field that will not
change if the numbers (or the order) of the fileds included
by the "SELECT *....". 
In the listing I posted the index of the nullarray (21) was
from the precompiler listing, actually if I remove, add or
change the order of the fields in the file is not anymore
21...

--- Jon.Paris@hal.it wrote:
> 
>  >> But this is not true anymore since I'm forced to
> identify the SQL
> %nullind whit an array and (of course) a fixed
> index. Any way out?
> 
> Yes.  Name the null fields individually and then use
> "Overlay" against the
> DS name to create the array that the pre-processor seems
> to need.  Like so:
> 
> 
>      D NullInds        DS
> 
>      D   Field1Ind                    5I 0
>      D   Field2Ind                    5I 0
>      D   Field3Ind                    5I 0
> 
>      D   NullArray                    5I 0 Dim(3)
> Overlay(NullInds)
> 
> This way you get to test the individual flags without
> resorting to array
> subscripts.
> 
> 
> 
> Alternatively you could use a constant to supply the
> subscript value and
> name the subscript appropriately.


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