>>Try PROGRAM() or ASTACKINFO()

Only SWAG: as I did not measure time needed for duplicate call in program(program(-1)-1) vs. astackinfo() filling array plus array access. I'd guess program(program(-1)-1) to be faster and to show less variation of runtime depending on stack level. When debugging or logging program state in depth: after astackinfo() you can obtain more info with ease as structure has been filled - but if you are after simple "who called me" info mentioned in yourOP to log semi automatically always hooked into your SQL operations I'd opt for function(s) call I guess to fulfill needs more KISS than others, here program(program(-1)-1).

my 0.02 €
thomas