adding some whys

crates/query-engine/translation/src/translation/mutation/experimental/mod.rs

@@ -33,9 +33,12 @@
 //!   It allows us to update a single row using the uniqueness constraint by updating the relevant columns,
 //!   and contains a pre check and post check for permissions.
 //!
-//! * Mutations using uniqueness constraints use the naming schema `by_column_and_column_and_column` instead of the db constraint name.
+//! * Mutations using uniqueness constraints use the naming schema `by_column_and_column_and_column` instead of the db constraint name,
+//!   because the former is far more helpful.
 //! * If generating a mutation encounters an internal error, we skip that particular mutation and trace a warning instead of throwing
 //!   an error so the connector can start at any situation.
+//! * Naming collisions between the unique constraints and the update_columns / pre_check / post_check is avoided by prefixing argument
+//!   names of the columns of a unique constraint with `key_`.
 
 pub mod common;
 pub mod delete;