Re: docfix - DELETE doesn't affect auto-analyze

Tom Lane <tgl(at)sss(dot)pgh(dot)pa(dot)us> wrote:

> Bruce Momjian <bruce(at)momjian(dot)us> writes:
> >> - is compared to the total number of tuples inserted, updated, or deleted
> >> + is compared to the total number of tuples inserted or updated
>
> As best I can tell, this description is even further away from the
> actual CVS HEAD behavior than the previous one. The code is comparing
> against
>
> anltuples = tabentry->n_live_tuples + tabentry->n_dead_tuples -
> tabentry->last_anl_tuples;
>
> and deletions surely increase n_dead_tuples.

Yes, but they also decrease n_live_tuples;
anltuples is not affected by deletions.

if (isCommit)
{
tabstat->t_counts.t_new_live_tuples +=
trans->tuples_inserted - trans->tuples_deleted;
tabstat->t_counts.t_new_dead_tuples += trans->tuples_deleted;
}

Regards,
---
ITAGAKI Takahiro
NTT Open Source Software Center