is false operator

Applies to: check marked yes Databricks SQL check marked yes Databricks Runtime

Tests whether expr is false.

Syntax 

expr is [not] false

Arguments

  • expr: A BOOLEAN or STRING expression.

Returns

A BOOLEAN.

If expr is a STRING of case-insensitive value 't', 'true', 'y', 'yes', or '1' it is interpreted as a BOOLEAN true. If the values is 'f', 'false', 'n', 'no', or '0' it is interpreted as a BOOLEAN false.

If expr is NULL the result is false.

If not is specified this operator returns true if expr is false or NULL and false otherwise.

If not is not specified the operator returns true if expr is true and false otherwise.

Examples 

> SELECT true is false;
 false

> SELECT 'f' is false;
 true

> SELECT false is false;
 true

> SELECT NULL is false;
 false

> SELECT 'invalid' is false;
 Error: CAST_INVALID_INPUT

> SELECT false is not false;
 false

> SELECT 'f' is not false;
 false

> SELECT true is not false;
 true

> SELECT NULL is not false;
 true