Categories: Boolean

IS [NOT] NULL

Determines if an expression is NULL or not NULL. Alias for the function ISNULL/ISNOTNULL.

Syntax

IS [NOT] NULL(expression any) → boolean

• expression: Expression of any Dremio supported data type to evaluate.

Examples

ISNULL function returns true if is NULL, and false otherwise.

select ISNULL('dremio')
-- False

ISNULL operator returns true if is NULL, and false otherwise.

select 'dremio' IS NULL
-- False

IS [NOT] NULL(expression any) → boolean

• expression: Expression of any Dremio supported data type to evaluate.

Examples

ISNOTNULL function returns true if is not NULL, and false otherwise.

select ISNOTNULL('dremio')
-- True

ISNOTNULL operator returns true if is not NULL, and false otherwise.

select 'dremio' IS NOT NULL
-- False