Re: [HACKERS] Suspicious place in heap_prepare_freeze_tuple()
| От | Alvaro Herrera | 
|---|---|
| Тема | Re: [HACKERS] Suspicious place in heap_prepare_freeze_tuple() | 
| Дата | |
| Msg-id | 20170705163621.tmcuwj2pgiqc3bzg@alvherre.pgsql обсуждение исходный текст | 
| Ответ на | [HACKERS] Suspicious place in heap_prepare_freeze_tuple() (Teodor Sigaev <teodor@sigaev.ru>) | 
| Ответы | Re: [HACKERS] Suspicious place in heap_prepare_freeze_tuple() | 
| Список | pgsql-hackers | 
Teodor Sigaev wrote: > Playing around freezing tuple I found suspicious piece of code: > > heap_prepare_freeze_tuple(): > ... > frz->t_infomask = tuple->t_infomask; > ... > frz->t_infomask &= ~HEAP_XMAX_BITS; > frz->xmax = newxmax; > if (flags & FRM_MARK_COMMITTED) > frz->t_infomask &= HEAP_XMAX_COMMITTED; > > Seems, in last line it should be a bitwise OR instead of AND. Now this line > cleans all bits in t_infomask which later will be copied directly in tuple. I think you're right. -- Álvaro Herrera https://www.2ndQuadrant.com/ PostgreSQL Development, 24x7 Support, Remote DBA, Training & Services
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