Re: Visibility of a local variable

"David G. Johnston" <david.g.johnston@gmail.com> writes:
> On Monday, June 3, 2024, Alejandro Burne <adburne@gmail.com> wrote:
>> A local variable, created within a transaction, continues to persist
>> (without value) after the transaction has ended.

> This is under-documented but at present there is no plan to change this
> long-standing behavior, just document it better.

Keep in mind that this entire behavior (ie the ability to create GUCs
not declared in the C code) is an undocumented abuse of the GUC
system.  We probably can't get rid of it at this late date, but
we're very unlikely to make any incompatible changes in the behavior.