The following documentation comment has been logged on the website:
Page: https://www.postgresql.org/docs/14/indexes-expressional.html
Description:
Regarding the paragraph (_emphasis_ added):
> Index expressions are relatively expensive to maintain, because the
derived expression(s) must be comp
The following documentation comment has been logged on the website:
Page: https://www.postgresql.org/docs/12/indexes-expressional.html
Description:
It appears as if the paragraph beginning: "If we were to declare this index
UNIQUE..."
actually belongs just before the paragraph beginning: "Expres
On Thu, Dec 16, 2021 at 04:57:37PM +, PG Doc comments form wrote:
> The following documentation comment has been logged on the website:
>
> Page: https://www.postgresql.org/docs/14/indexes-expressional.html
> Description:
>
> Regarding the paragraph (_emphasis_ added):
>
> > Index expression
Thank you for that (speedy) explanation and patch Bruce! That all makes
perfect sense.
Cheers,
- Chris
On December 16, 2021, Bruce Momjian wrote:
> On Thu, Dec 16, 2021 at 04:57:37PM +, PG Doc comments form wrote:
> > The following documentation comment has been logged on the website:
> >
On Fri, Dec 17, 2021 at 09:41:32AM +, Chris Lowder wrote:
> Thank you for that (speedy) explanation and patch Bruce! That all makes
> perfect
> sense.
There are actually two questions being addressed here:
1. In what cases are new index entries added, and for which indexes?
2. In what cas
On Fri, Dec 17, 2021 at 2:43 PM Bruce Momjian wrote:
> I am attaching an updated patch which mentions non-HOT updates for
> expression indexes.
>
Thanks. I'm a bit concerned that before this patch the only place we
mentioned HOTin the docs is in the appendix acronym listing which points to
the
On Wed, Dec 22, 2021 at 02:40:12PM -0700, David G. Johnston wrote:
> On Fri, Dec 17, 2021 at 2:43 PM Bruce Momjian wrote:
>
> I am attaching an updated patch which mentions non-HOT updates for
> expression indexes.
>
>
> Thanks. I'm a bit concerned that before this patch the only place
On Wed, Dec 22, 2021 at 2:45 PM Bruce Momjian wrote:
> On Wed, Dec 22, 2021 at 02:40:12PM -0700, David G. Johnston wrote:
> > On Fri, Dec 17, 2021 at 2:43 PM Bruce Momjian wrote:
> >
> > I am attaching an updated patch which mentions non-HOT updates for
> > expression indexes.
> >
> >
>
On Wed, Dec 22, 2021 at 03:06:12PM -0700, David G. Johnston wrote:
> On Wed, Dec 22, 2021 at 2:45 PM Bruce Momjian wrote:
> Not sure what else we can do --- it would be odd to explain it in the
> expression index docs.
>
>
>
> Found another one:
>
> https://www.postgresql.org/docs/curr
On Wed, Dec 22, 2021 at 05:09:53PM -0500, Bruce Momjian wrote:
> On Wed, Dec 22, 2021 at 03:06:12PM -0700, David G. Johnston wrote:
> > On Wed, Dec 22, 2021 at 2:45 PM Bruce Momjian wrote:
> > Not sure what else we can do --- it would be odd to explain it in the
> > expression index docs.
On Wed, Dec 22, 2021 at 3:09 PM Bruce Momjian wrote:
> On Wed, Dec 22, 2021 at 03:06:12PM -0700, David G. Johnston wrote:
> > On Wed, Dec 22, 2021 at 2:45 PM Bruce Momjian wrote:
> > Not sure what else we can do --- it would be odd to explain it in the
> > expression index docs.
> >
> >
On Wed, Dec 22, 2021 at 3:13 PM Bruce Momjian wrote:
> I think our _big_ missing information is a definition of HOT updates and
> that updating a column involved in an index disables HOT updates.
>
Along those lines adding "51.7 Special Considerations for Updates" would be
minimally invasive. H
On Wed, Dec 22, 2021 at 2:13 PM Bruce Momjian wrote:
> I think our _big_ missing information is a definition of HOT updates and
> that updating a column involved in an index disables HOT updates.
I *strongly* agree that that's the single most important piece of
information, by far. Though we coul
PG Doc comments form writes:
> Page: https://www.postgresql.org/docs/12/indexes-expressional.html
> It appears as if the paragraph beginning: "If we were to declare this index
> UNIQUE..."
> actually belongs just before the paragraph beginning: "Expression indexes
> also allow control over..."
>
The following documentation comment has been logged on the website:
Page: https://www.postgresql.org/docs/12/indexes-expressional.html
Description:
The paragraph that begins "If we were to declare this index UNIQUE,..."
refers to the index test1_lower_col1_idx, not to the test1_uniq_int index it
PG Doc comments form writes:
> The paragraph that begins "If we were to declare this index UNIQUE,..."
> refers to the index test1_lower_col1_idx, not to the test1_uniq_int index it
> currently follows. It would appear the latter example was spliced into the
> middle of discussing the former.
Yes
On Tue, May 19, 2020 at 10:32:01AM -0400, Tom Lane wrote:
> PG Doc comments form writes:
> > The paragraph that begins "If we were to declare this index UNIQUE,..."
> > refers to the index test1_lower_col1_idx, not to the test1_uniq_int index it
> > currently follows. It would appear the latter ex
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