An Easy Way to Set Up Stage Tables for Snowpipe
by Mauricio Rojas, on Jun 6, 2022 1:58:29 PM
Snowpipe is a powerful tool for automating your data loading process. However, it's not always easy to setup all the transformations you may need in the COPY statement. You might need to load data in a temporary table and/or perform some data filtering. If so, let's take a closer look at a how to set that process up using some stored procedures.
To get started, you will need to replicate the structure of the target table. Snowflake offers the CREATE TABLE … LIKE operation which creates an empty copy of an existing table. This is super useful because with one simple line you can replicate the table structure.
With respect to constraint enforcement, Snowflake only enforces the NOT NULL constraint. For data loading, you might need to turn it off. To do so, you can use a Stored Procedure like the following:
Now you can call the procedure with this line of code:
Finally, you can use some simple code like this to setup your stage tables.
Hope this helps as you navigate your way through the Snowflake Snowpipe. And while you're doing all of that navigating, you should do it as a part of BlackDiamond Studio by Mobilize.Net, the Code Cloud for Snowflake's Data Cloud.