After further study, I realized that fetchatt() and a number of other
places were not prepared to cope with 8-byte pass-by-value datatypes.
Most of them weren't checking for cases they couldn't handle, either.
Here is a revised patch for you to try (this includes yesterday's patch
plus more changes, so you'll need to reverse out the prior patch before
applying this one). NOTE you will need to do a full reconfigure and
rebuild to make this fly --- I'd suggest "make distclean" to start.
regards, tom lane
