AWS
docs.aws.amazon.com › amazon redshift › database developer guide › sql reference › sql commands › create function
CREATE FUNCTION - Amazon Redshift
Creates a new scalar user-defined function (UDF) using either a SQL SELECT clause or a Python program.
AWS
docs.aws.amazon.com › amazon redshift › database developer guide › user-defined functions in amazon redshift
User-defined functions in Amazon Redshift - Amazon Redshift
You can create a custom scalar user-defined function (UDF) using either a SQL SELECT clause or a Python program. The new function is stored in the database and is available for any user with sufficient privileges to run. You run a custom scalar UDF in much the same way as you run existing Amazon ...
sql - How to put redshift query in function? - Stack Overflow
So, my question: "Is there any way to create show_tables() function in redhsift?" ... Interesting idea! I really should have asked about how to reduce typing when listing tables in redshift. More on stackoverflow.com
amazon web services - Create Redshift UDF that can query from a table - Stack Overflow
Sounds like the "function creation" part works. The Python part works for me outside of Redshift, so not sure what's upsetting it. Unfortunately I don't have a Redshift instance on which to test it. More on stackoverflow.com
Any examples of useful Amazon Redshift SQL User Defined Functions? - Stack Overflow
I'm wondering if anyone can share an example of how they have utilized a redshift user-defined function to help them optimize a query or script. In the Redshift documentation - https://docs.aws.ama... More on stackoverflow.com
Create timestampdiif function in Redshift - Stack Overflow
I'm trying to create function in redshift that will calculate the exactly gap between two dates, like timestampdiff in MySQL. I'm running the attached script CREATE FUNCTION public.timestampdiff... More on stackoverflow.com
Videos
#20 User Defined functions in Redshift
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AWS Redshift User Defined Functions - YouTube
33:12
Overview of Redshift and User Defined Function - YouTube
42:51
AWS Tutorials - Workflow of Redshift SQLs using Step Functions ...
24:26
AWS Tutorials - Using Lambda UDF with Amazon Redshift - YouTube
Dwgeek
dwgeek.com › home › redshift user defined functions examples
Redshift User Defined Functions Examples - DWgeek.com
February 22, 2023 - Create a user defined function ... functions. You can create custom user-defined functions (UDF) using either SQL SELECT statements or Python program....
AWS
docs.aws.amazon.com › amazon redshift › database developer guide › sql reference › sql commands › create external function
CREATE EXTERNAL FUNCTION - Amazon Redshift
Creates a scalar user-defined function (UDF) based on AWS Lambda for Amazon Redshift.
BMC Software
bmc.com › blogs › amazon-redshift-udf-python
Creating Redshift User Defined Function (UDF) in Python – BMC Software | Blogs
You can create user defined functions in Amazon Redshift in Python. If you use Amazon Lambda containerless virtual machines, then you can use additional languages. (Using AWS Lambda, you will have some usage costs.
Hevo
hevodata.com › home › learn › data warehousing
Fundamentals of Redshift Functions: Python UDF & SQL UDF with 2 Examples - Learn | Hevo
January 9, 2026 - When a Scalar Python UDF is called, it contains a Python Programme that executes and returns a single value. The Redshift function used here is CREATE FUNCTION, which creates a new scalar User-Defined Function (UDF).
GitHub
github.com › aws-samples › amazon-redshift-udfs
GitHub - aws-samples/amazon-redshift-udfs: A collection of example UDFs for Amazon Redshift. · GitHub
Creating the UDF function in Redshift by executing the function.sql sql script.
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Trevor Fox
trevorfox.com › 2020 › 02 › intro-to-sql-udfs-in-redshift
Intro to SQL User-Defined Functions: A Redshift UDF Tutorial • Trevor Fox
March 19, 2023 - You could also write this function with two parameters. Here’s an example if you were using Google Analytics data. You could take in the parameters, hostname and a page_path to get more granular with your URL categorization. This is Redshift’s example from their docs. It takes two parameters (both specified as float) and returns the value that is greater of the two. create function f_sql_greater (float, float) returns float stable as $$ select case when $1 > $2 then $1 else $2 end $$ language sql;
GitHub
github.com › awsdocs › amazon-redshift-developer-guide › blob › master › doc_source › r_CREATE_FUNCTION.md
amazon-redshift-developer-guide/doc_source/r_CREATE_FUNCTION.md at master · awsdocs/amazon-redshift-developer-guide
September 21, 2018 - You can call another SQL user-defined function (UDF) from within a SQL UDF. The nested function must exist when you run the CREATE FUNCTION command. Amazon Redshift doesn't track dependencies for UDFs, so if you drop the nested function, Amazon Redshift doesn't return an error.
Author awsdocs
Top answer 1 of 2
1
If your return type is anyelement, atleast one of your input parameters must be anyelement.
For reference, visit the relevant section (towards the bottom of the page) at Amazon Redshift Documentation
2 of 2
0
The Create Function comes with a $$ notation (Dollar Notation). Please check the AWS Documentation.
For this I Hope the following helps :
CREATE FUNCTION show_tables(Some arguments here if required)
RETURNS ANYELEMENT VOLATILE
AS $_$ SELECT DISTINCT tablename
FROM pg_table_def
WHERE schemaname = public
ORDER BY tablename
$_$
LANGUAGE sql;
Stack Overflow
stackoverflow.com › questions › 78062761 › create-redshift-udf-that-can-query-from-a-table
amazon web services - Create Redshift UDF that can query from a table - Stack Overflow
I have this function in SQL that replaces the input string with values from a table. I can't make it work in Redshift because it doesn't accept the FROM clause. Thoughts? CREATE FUNCTION [dbo].[udf_StringReplace](@str VARCHAR(200)) RETURNS VARCHAR(200) WITH SCHEMABINDING, RETURNS NULL ON NULL INPUT AS BEGIN SELECT @str = REPLACE(UPPER(@str),find,sub) FROM [dbo].[StringReplace] RETURN @str END
Sisense
sisense.com › home › redshift user defined functions in python
Redshift User Defined Functions in Python | Sisense
March 18, 2022 - Now you can add your favorite SQL functions from other databases or invent new ones to make your data analysis much easier.
Stack Overflow
stackoverflow.com › questions › 33389023 › create-timestampdiif-function-in-redshift
Create timestampdiif function in Redshift - Stack Overflow
In case anybody's search lands here, Amazon Redshift has the DATEDIFF fuction. DATEDIFF ( datepart, {date|timestamp}, {date|timestamp} ) datepart specifies the part of of the date or timestamp that you want the function to operate on.
SAS Support Communities
communities.sas.com › t5 › SAS-Programming › Create-Scalar-Function-in-Redshift-Using-Pass-Through › td-p › 725843
Create Scalar Function in Redshift Using Pass-Through - SAS Support Communities
March 13, 2021 - Do you have access to a genuine Redshift SQL client to test this in? In my experience if it works OK in a genuine SQL-specific client it will work in SAS passthru. This holds true with Oracle and SQL Server databases I've used recently. ... Yes, I do. If I create the function in SQL client we have, using the same language within my EXECUTE() statement, it creates just fine.
AWS re:Post
repost.aws › articles › ARAG0AgN80SjyvzTH0Ngfjbg › speed-up-redshift-udf-development-and-share-useful-code
Speed up Redshift UDF Development and share useful code | AWS re:Post
January 18, 2023 - There are many options (python, sql, lambda) to create scalar user-defined functions in Amazon Redshift. The AWS documentation details the steps required to create each type, however, the it can be a challenging to get started. The following github repository simplifies the process by providing a framework to creating, testing and managing your functions.
AWS
docs.aws.amazon.com › amazon redshift › database developer guide › user-defined functions in amazon redshift › scalar sql udfs
Scalar SQL UDFs - Amazon Redshift
The CREATE FUNCTION command defines the following parameters: (Optional) Input arguments. Each argument must have a data type. One return data type. One SQL SELECT clause. In the SELECT clause, refer to the input arguments using $1, $2, and so on, according to the order of the arguments in the function definition. The input and return data types can be any standard Amazon Redshift ...
AWS
docs.aws.amazon.com › amazon redshift › database developer guide › sql reference › sql functions reference
SQL functions reference - Amazon Redshift
Work with the standard SQL functions and extensions to the SQL standards that Amazon Redshift supports.
AWS re:Post
repost.aws › knowledge-center › redshift-lambda-function-queries
Create a Lambda function to run Amazon Redshift queries | AWS re:Post
March 14, 2022 - Choose the role created for your Lambda function. Choose Add Permissions. Choose Attach policies. Add the AmazonRedshiftDataFullAccess and SecretsManagerReadWrite policies to your Lambda execution role. Note: It's a best practice to grant least privilege for only the permissions required to perform a task. In the following example, Lambda connects to the Amazon Redshift database and creates a lambda_func table in the public schema.