AS_FLOAT

Strict casting VARIANT values to DOUBLE 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_FLOAT( <variant> )

Arguments

Return Type

DOUBLE

Examples

SELECT as_float(parse_json('12.34'));
+-------------------------------+
| as_float(parse_json('12.34')) |
+-------------------------------+
| 12.34                         |
+-------------------------------+

SELECT as_float(parse_json('123'));
+-----------------------------+
| as_float(parse_json('123')) |
+-----------------------------+
| 123.0                       |
+-----------------------------+

-- Returns NULL for non-numeric values
SELECT as_float(parse_json('"abc"'));
+-------------------------------+
| as_float(parse_json('"abc"')) |
+-------------------------------+
| NULL                          |
+-------------------------------+