Hello,
On 9/15/10 5:44 PM, Iñaki Baz Castillo wrote:
2010/9/15 Juha Heinanen<j...@tutpro.com>:
Iñaki Baz Castillo writes:
I retrieve the value of an integer column in a MySQL table. In this
case the value is NULL. I store the result in a $var:
$var(client_max_calls) = $dbr(client=>[0,0]);
But the stored value is "" (empty string) rather than 0. Isn't a bit
confussing?
inaki,
yes, it is.
have you tried what happens if you explicitly convert the rhs value to
(int)?
the config does not have the concept of pointers, so $null is pretty
much particular to each PV class:
- it is like 'not defined' for those PV that can be completely removed
from the config space. For example, AVPs are are a list of (name, value)
pairs. When you remove one pair, it is gone from config. You can say
they are dynamic named variables.
- it is like 'default value' for those PVs that cannot be completely
removed from config space. For exampe, $var(x) is resolved to a memory
address structure at startup (for fast access) and cannot be removed
(otherwise the C pointer will be lost). So assigning $null resets it to
default, which is integer 0. You can say they are static named variables
Cheers,
Daniel
--
Daniel-Constantin Mierla
http://www.asipto.com
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