[inbx0]

Yes. And that is what a client should 100% do from the security standpoint. But since you mention caching - from the perf standpoint, it could sometimes be beneficial for the query planner to know the values before coming up with the query plan. Sometimes I have done little optimizations by replacing prepared statement placeholders with baked-in numbers or known enum values.

[jiggawatts]

In .NET land that's handled by EF Core 9 using the EF.Constant(...) and EF.Parameter(...) wrappers that either (safely!) inline the value or force parameterisation.

https://learn.microsoft.com/en-us/ef/core/what-is-new/ef-cor...