Select your cookie preferences

We use essential cookies and similar tools that are necessary to provide our site and services. We use performance cookies to collect anonymous statistics, so we can understand how customers use our site and make improvements. Essential cookies cannot be deactivated, but you can choose “Customize” or “Decline” to decline performance cookies.

If you agree, AWS and approved third parties will also use cookies to provide useful site features, remember your preferences, and display relevant content, including relevant advertising. To accept or decline all non-essential cookies, choose “Accept” or “Decline.” To make more detailed choices, choose “Customize.”

Preferences
Contact Us
Feedback
AWS Documentation
Create an AWS Account

Change field names in arrays using CAST

PDF
RSS
Focus mode
Change field names in arrays using CAST - Amazon Athena

To change the field name in an array that contains ROW values, you can CAST the ROW declaration:

WITH dataset AS (
  SELECT
    CAST(
      ROW('Bob', 38) AS ROW(name VARCHAR, age INTEGER)
    ) AS users
)
SELECT * FROM dataset

This query returns:

+--------------------+
| users              |
+--------------------+
| {NAME=Bob, AGE=38} |
+--------------------+
Note

In the example above, you declare name as a VARCHAR because this is its type in Presto. If you declare this STRUCT inside a CREATE TABLE statement, use String type because Hive defines this data type as String.

PrivacySite termsCookie preferences
© 2025, Amazon Web Services, Inc. or its affiliates. All rights reserved.