Categories:: Semi-structured and structured data functions (Type Predicates)

IS_DATE , IS_DATE_VALUE¶

Returns TRUE if its VARIANT argument contains a DATE value.

IS_DATE and IS_DATE_VALUE are synonymous.

See also:: IS_<object_type> , IS_TIME , IS_TIMESTAMP_*

Syntax¶

IS_DATE( <variant_expr> )

IS_DATE_VALUE( <variant_expr> )

Arguments¶

variant_expr: An expression that evaluates to a value of type VARIANT.

Returns¶

Returns a BOOLEAN value or NULL.

Returns TRUE if the VARIANT value contains a DATE value. Otherwise, returns FALSE.
If the input is NULL, returns NULL without reporting an error.

Examples¶

Return all of the DATE values in a VARIANT column.

Note

The output format for date values is set using the DATE_OUTPUT_FORMAT parameter. The default setting is YYYY-MM-DD.

Create and load a table with various date and time values in a VARIANT column:

CREATE OR REPLACE TABLE vardttm (v VARIANT);

INSERT INTO vardttm SELECT TO_VARIANT(TO_DATE('2024-02-24'));
INSERT INTO vardttm SELECT TO_VARIANT(TO_TIME('20:57:01.123456789+07:00'));
INSERT INTO vardttm SELECT TO_VARIANT(TO_TIMESTAMP('2023-02-24 12:00:00.456'));
INSERT INTO vardttm SELECT TO_VARIANT(TO_TIMESTAMP_LTZ('2022-02-24 13:00:00.123 +01:00'));
INSERT INTO vardttm SELECT TO_VARIANT(TO_TIMESTAMP_NTZ('2021-02-24 14:00:00.123 +01:00'));
INSERT INTO vardttm SELECT TO_VARIANT(TO_TIMESTAMP_TZ('2020-02-24 15:00:00.123 +01:00'));

Use the TYPEOF function in a query to show the data types of the values stored in the VARIANT column v:

SELECT v, TYPEOF(v) AS type FROM vardttm;

+---------------------------------+---------------+
| V                               | TYPE          |
|---------------------------------+---------------|
| "2024-02-24"                    | DATE          |
| "20:57:01"                      | TIME          |
| "2023-02-24 12:00:00.456"       | TIMESTAMP_NTZ |
| "2022-02-24 04:00:00.123 -0800" | TIMESTAMP_LTZ |
| "2021-02-24 14:00:00.123"       | TIMESTAMP_NTZ |
| "2020-02-24 15:00:00.123 +0100" | TIMESTAMP_TZ  |
+---------------------------------+---------------+

Show the DATE values in the data by using the IS_DATE function in a WHERE clause. Only the DATE value is returned in the output. The TIME and TIMESTAMP values aren’t returned.

SELECT v FROM vardttm WHERE IS_DATE(v);

+--------------+
| V            |
|--------------|
| "2024-02-24" |
+--------------+