On Wed, Apr 9, 2025 at 1:50 PM Laurenz Albe <laurenz.a...@cybertec.at> wrote:
> If you use EXPLAIN (VERBOSE), you will see that the function gets inlined > in the fast case. > > That saves the overhead of a function call. > > The IMMUTABLE function cannot be inlined because to_char() is not > IMMUTABLE. > So, the punishment for lying about the volatility of one's function is to prohibit it from being inlined even in a case where had you been truthful about the volatility it would have been inlined. David J.
