Wrong primary.idx images in "A Practical Introduction to Primary Indexes in ClickHouse"

[pamarcos]

Describe the issue Option 2: Materialized Views and Option 3: Projections explicitly state

Effectively the implicitly created hidden table has the same row order and primary index as the secondary table that we created explicitly:

However, both have the following primary.idx image:

Notice the order of the columns: it says UserID, URL when it should say URL, UserID as Option 1: Secondary Tables