AS_BOOLEAN
Strict casting VARIANT
values to BOOLEAN data type.
If the input data type is not VARIANT
, the output is NULL
.
If the type of value in the VARIANT
does not match the output value, the output is NULL
.
Syntax
AS_BOOLEAN( <variant> )
Arguments
Arguments | Description |
---|---|
<variant> | The VARIANT value |
Return Type
BOOLEAN
Examples
SELECT as_boolean(parse_json('true'));
+--------------------------------+
| as_boolean(parse_json('true')) |
+--------------------------------+
| 1 |
+--------------------------------+
SELECT as_boolean(parse_json('false'));
+---------------------------------+
| as_boolean(parse_json('false')) |
+---------------------------------+
| 0 |
+---------------------------------+
-- Returns NULL for non-boolean values
SELECT as_boolean(parse_json('123'));
+-------------------------------+
| as_boolean(parse_json('123')) |
+-------------------------------+
| NULL |
+-------------------------------+