RLS Documentation - Invalid SQL Query

[wes-sleeman]

The RLS documentation included a number of queries of the form SELECT * FROM account WHERE identity = :sender. Any attempt to deploy such an RLS query yields the below very unhelpful error:

spacetime publish -s maincloud <PROJECT_NAME> --project-path <PROJECT_FOLDER>
Optimising module with wasm-opt...
Build finished successfully.
You are about to publish to a non-local server: maincloud.spacetimedb.com
Are you sure you want to proceed? [y/N]y
Uploading to maincloud => https://maincloud.spacetimedb.com
Publishing module...
Error: Failed to create or update the database: Unsupported expression: identity

Caused by:
    HTTP status client error (400 Bad Request) for url (https://maincloud.spacetimedb.com/v1/database/<PROJECT_NAME>)

I tested this (in a C# module) with a couple different choices of column name and got the same result. After much hair-pulling, I read the actual parsing logic and found that the fix to this is to qualify the identity column as account.identity (tested and working locally and on maincloud). Reading through some of the other documentation, I have a sneaking suspicion that the unqualified column name is supposed to be permitted here, but this PR might save a few people some serious frustration along the way and can be reverted if/when this is determined to be a bug and a fix is published.