Module kdbplus::qnull_base

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.