diff options
| author | Andres Freund <andres@anarazel.de> | 2018-11-27 10:07:03 -0800 |
|---|---|---|
| committer | Andres Freund <andres@anarazel.de> | 2018-11-27 10:07:03 -0800 |
| commit | b238527664ec6f6c9d00dba4cc2f3dab1c8b8b04 (patch) | |
| tree | 03df0a6229aadc8a458ef673eec64ddd1ee1e64b /contrib/postgres_fdw/postgres_fdw.c | |
| parent | f17889b2214194d7bd33900509bf08959d5a7efa (diff) | |
| download | postgresql-b238527664ec6f6c9d00dba4cc2f3dab1c8b8b04.tar.gz postgresql-b238527664ec6f6c9d00dba4cc2f3dab1c8b8b04.zip | |
Fix jit compilation bug on wide tables.
The function generated to perform JIT compiled tuple deforming failed
when HeapTupleHeader's t_hoff was bigger than a signed int8. I'd
failed to realize that LLVM's getelementptr would treat an int8 index
argument as signed, rather than unsigned. That means that a hoff
larger than 127 would result in a negative offset being applied. Fix
that by widening the index to 32bit.
Add a testcase with a wide table. Don't drop it, as it seems useful to
verify other tools deal properly with wide tables.
Thanks to Justin Pryzby for both reporting a bug and then reducing it
to a reproducible testcase!
Reported-By: Justin Pryzby
Author: Andres Freund
Discussion: https://postgr.es/m/20181115223959.GB10913@telsasoft.com
Backpatch: 11, just as jit compilation was
Diffstat (limited to 'contrib/postgres_fdw/postgres_fdw.c')
0 files changed, 0 insertions, 0 deletions