IS_BOOLEAN function - Amazon Redshift
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IS_BOOLEAN function

Checks whether a value is a BOOLEAN. The IS_BOOLEAN function returns true for constant JSON Booleans. The function returns false for any other values, including null.

Syntax

IS_BOOLEAN(super_expression)

Arguments

super_expression

A SUPER expression or column.

Return type

BOOLEAN

Examples

To check if TRUE is a BOOLEAN using the IS_BOOLEAN function, use the following example.

CREATE TABLE t(s SUPER); INSERT INTO t VALUES (TRUE); SELECT s, IS_BOOLEAN(s) FROM t; +------+------------+ | s | is_boolean | +------+------------+ | true | true | +------+------------+