Re: Replace magic numbers with strategy numbers for B-tree indexes

On 30.06.25 05:21, Daniil Davydov wrote:
> Hi,
> I noticed that some asserts and cycles use magic numbers 1 and 0
> instead of BTLessStrategyNumber and InvalidStrategy.
> At the same time, the BTMaxStrategyNumber macro is used there.
> I suggest using appropriate macros for 1 and 0 values.

This code, both the original and your changes, make a lot of assumptions
about the btree strategy numbers, such as that BTLessStrategyNumber is
the smallest valid one, that InvalidStrategy is smaller than all of
them, and that all numbers between the smallest and BTMaxStrategyNumber
are assigned.

However, some of the code actually does require that, because it fills
in array fields for consecutive strategy numbers. So hiding that fact
by changing 1 to BTLessStrategyNumber introduces more mystery.

I think if we want to abstract all that away, this would need a deeper
approach somehow.