CHECKSUM function - Amazon Redshift

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 .

CHECKSUM function

Computes a checksum value for building a hash index.

Syntax

CHECKSUM(expression)

Argument

expression

The input expression must be a VARCHAR, INTEGER, or DECIMAL data type.

Return type

The CHECKSUM function returns an integer.

Example

The following example computes a checksum value for the COMMISSION column:

select checksum(commission) from sales order by salesid limit 10; checksum ---------- 10920 1140 5250 2625 2310 5910 11820 2955 8865 975 (10 rows)