On 12.12.2012 14:24, David Gould wrote:
I don't know if this is the same thing. At least in the comments I was
reading trying to figure this out there was some concern that someone
else could change the space on the page. Does RelationGetBufferForTuple()
guarantee against this too?
Yeah, RelationGetBufferForTuple grabs a lock on the page before
returning it. For comparison, plain heap_insert does simply this:
buffer = RelationGetBufferForTuple(relation, heaptup->t_len,
InvalidBuffer, options, bistate,
&vmbuffer, NULL);
/* NO EREPORT(ERROR) from here till changes are logged */
START_CRIT_SECTION();
RelationPutHeapTuple(relation, buffer, heaptup);
- Heikki
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