Re: Compressed TOAST Slicing

[Andrey Borodin]

> 9 апр. 2019 г., в 22:20, Andres Freund <and...@anarazel.de> написал(а):
> 
> Just use memmove? It's usually as fast these days.
No, unfortunately, it is fixing things incompatible way.
In pglz side-effects of overlapping addresses are necessary, not the way 
memmove avoids it.

I.e. bytes
01234
  ^ copy here three bytes
memmove will give
01012
but we want
01010
    ^ this 0 is taken from result of overwrite by first byte move.

Best regards, Andrey Borodin.