Module kdbplus::qnull_base [−][src]
Expand description
This module provides a list of underlying null values of q objects. The motivation to contain
them in a module is to tie them up as related items rather than scattered values. Hence user
should use these indicators with qnull::
prefix, e.g., qnull_base::F
.
These values are mainly used to construct K
object for api
module but underlying values are
same for ipc
module for simple types. For ipc
module, proper null values of each type are
provided under qnull
namespace.
Constants
C | Null value of char. |
E | Null value of real. |
F | Null value of float family, i.e., float and datetime. |
H | Null value of short. |
I | Null value of int family, i.e., int, month, date, minute, second and time. |
J | Null value of long family, i.e., long, timestamp and timespan. |
S | Null value of string family (symbol, string). |
U | Null value of GUID. |