Amazon Redshift will no longer support the creation of new Python UDFs starting November 1, 2025. If you would like to use Python UDFs, create the UDFs prior to that date. Existing Python UDFs will continue to function as normal. For more information, see the blog post .

interval_forbid_composite_literals

Values (default in bold)

false, true

Description

A session configuration that modifies the value of an interval that contain both YEAR TO MONTH and DAY TO SECOND parts.

If interval_forbid_composite_literals is true, an error is returned if an interval with both YEAR TO MONTH and DAY TO SECOND parts is encountered. For example, the following SQL contains an INTERVAL DAY TO SECOND with both YEAR TO MONTH and DAY TO SECOND parts.

SELECT INTERVAL '1 year 1 day' DAY TO SECOND;
ERROR:  Interval Day To Second literal cannot contain year-month parts. Disable the GUC interval_forbid_composite_literals to suppress this error and silently discard the year-month part.

If interval_forbid_composite_literals is false, Amazon Redshift suppresses an error and truncates the YEAR TO MONTH part from an INTERVAL DAY TO SECOND value. For example, the following SQL contains an INTERVAL DAY TO SECOND with both YEAR TO MONTH and DAY TO SECOND parts.

SET interval_forbid_composite_literals to "false";
SELECT INTERVAL '1 year 1 day' DAY TO SECOND;

   
 intervald2s
------------------------------
1 days 0 hours 0 mins 0.0 secs