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AS_ARRAY | Snowflake Documentation

Categories:

Semi-structured and structured data functions (Cast)

Casts a VARIANT value to an ARRAY value.

See also:

AS_<object_type> , AS_OBJECT

AS_ARRAY( <variant_expr> )

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variant_expr

An expression that evaluates to a value of type VARIANT.

The function returns a value of type ARRAY or NULL:

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

• 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.

• This function doesn’t support a structured type as an input argument.

Create a table and load data into it:

CREATE OR REPLACE TABLE as_array_example (
  array1 VARIANT,
  array2 VARIANT);

INSERT INTO as_array_example (array1, array2)
  SELECT
    TO_VARIANT(TO_ARRAY('Example')),
    TO_VARIANT(ARRAY_CONSTRUCT('Array-like', 'example'));

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Use the AS_ARRAY function in a query to cast a VARIANT value to ARRAY values:

SELECT AS_ARRAY(array1) AS array1,
       AS_ARRAY(array2) AS array2
  FROM as_array_example;

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+-------------+-----------------+
| ARRAY1      | ARRAY2          |
|-------------+-----------------|
| [           | [               |
|   "Example" |   "Array-like", |
| ]           |   "example"     |
|             | ]               |
+-------------+-----------------+

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