I’m experiencing issues with Regex within a Looker Studio table. I have a table column with a dimension that contains both:
- ‘Product name’
- ‘Product name [id]’
I want to use regex to get rid of the ‘[id]’ portion (in other words, only have the product name).
I managed to get a working expression within a regex tester:
This matches the correct part in this tester, but when trying this within Looker Studio Regex_Extract I get this error message:

So how do I actually extract the product name (with a variable number of characters) from this dimension?
