is_null#

Description#

Return true if the argument has the null value.

Return type#

bool

Domain#

This is a scalar function (calculates a single output value for a single input row.)

Categories#

Usage#

is_null(arg)

Argument

Type

Optional

Repeatable

Restrictions

arg

scalar

no

no

none

Examples#

filter not is_null(path)

This filters a dataset to remove any lines where path is null.

Aliases#

isnull (deprecated)