Re: [Q] Indicator Variables in Pro*C/C++
From: <jblazquez_at_my-deja.com>
Date: Thu, 17 Jun 1999 08:11:42 GMT
Message-ID: <7kaajq$dbe$1_at_nnrp1.deja.com>
Date: Thu, 17 Jun 1999 08:11:42 GMT
Message-ID: <7kaajq$dbe$1_at_nnrp1.deja.com>
> Why do we have to use _special_ (indicator) variables?
> Is not there any possibility to manage only with host ones?
>
You must use indicator variables only if query can return null values for a column. With null values in a column the only elegant way to do it is with the use of indicator variables. You know in C there isn't any null value for datatypes int, char, etc.
If you query non null fields you don't need it. If you query nullable fields you can map nulls to data values with NVL function... but this is not good programming practice.
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Received on Thu Jun 17 1999 - 10:11:42 CEST