Andrew - Supernews <andrew+nonews(at)supernews(dot)com> writes:
> On 2005-08-31, Simon Riggs <simon(at)2ndquadrant(dot)com> wrote:
>> During CREATE INDEX we include all tuples, even if they are already dead
>> when we build an index.
>> What purpose does this serve?
>> A pre-existing transaction can't see the index,
> Yes, it can; the catalog is read in SnapshotNow rather than in the query
In fact, it had better be able to, since once the CREATE INDEX commits,
pre-existing xacts are responsible to insert index entries for anything
they insert into the table.
regards, tom lane
In response to
pgsql-hackers by date
|Next:||From: Tom Lane||Date: 2005-08-31 23:24:35|
|Subject: Re: Minimally avoiding Transaction Wraparound in VLDBs |
|Previous:||From: Andrew - Supernews||Date: 2005-08-31 22:31:53|
|Subject: Re: Indexing dead tuples|