Categories:

Semi-structured and structured data functions (Cast)

AS_TIME¶

Casts a VARIANT value to a TIME value. This function does not convert values of other data types, including timestamps, to TIME values.

See also:

AS_<object_type>

AS_DATE , AS_TIMESTAMP_*

Syntax¶

AS_TIME( <variant_expr> )
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Arguments¶

variant_expr

An expression that evaluates to a value of type VARIANT.

Returns¶

The function returns a value of type TIME or NULL:

  • If the type of the value in the variant_expr argument is TIME, the function returns a value of type TIME.

  • If the type of the value in the variant_expr argument doesn’t match the type of the output value, the function returns NULL.

  • If the variant_expr argument is NULL, the function returns NULL.

Examples¶

Create a table and load data into it:

CREATE OR REPLACE TABLE as_time_example (time1 VARIANT);

INSERT INTO as_time_example (time1)
  SELECT TO_VARIANT(TO_TIME('12:34:56'));
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Use the AS_TIME function in a query to cast a VARIANT value to a TIME value:

SELECT AS_TIME(time1) AS time_value
  FROM as_time_example;
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+------------+
| TIME_VALUE |
|------------|
| 12:34:56   |
+------------+