integer key max value

Hi,
Why exists a max limit to integer key value of 0xFFFFFFFF ?

I have greaters keys values that I can´t use. With string keys is allowed lenght until 255 characters

thanks

The issue names no files, tests, or entry points. Start by locating the integer-key encoding and the 0xFFFFFFFF validation, then compare it with string-key length handling; done means documenting the rationale or defining and testing a supported larger-key behavior.

Written by the indexing model from the issue text.