Re: How to REMOVE a fillfactor set by accident?

On 12/31/20 2:13 PM, Thorsten Schöning wrote:
> Hi all,
>
> I'm using the GUI tool pgModeler to maintain schemas and at some point
> in the past it used fillfactor 10 for some indexes by default. That
> seems to have changed in the meantime and most of my indexes don't
> have ANY fillfactor set explicitly.
>
> Is there some way to REMOVE the fillfactor where it is set, so that
> Postgres applies it's defaults? Would be great to have an output of
> NULL everywhere where fillfactor is output instead of sometimes e.g.
> 100 and more often NULL.
>
> I've already tried setting things to NULL, which failed with
> mentioning that a decimal number is necessary. Though, even setting 0
> fails, because a value between 10 and 100 is required.
>
>> ALTER INDEX pk_clt_rec_src SET (fillfactor = NULL);
>> ALTER INDEX pk_clt_rec_src SET (fillfactor = 0);
> So removing isn't possible at all and I can only set to concrete
> values like 100 or don't care at all instead? Because fillfactor=10 is
> only set for some low throughput test databases currently.

https://www.postgresql.org/docs/12/sql-createindex.html

There *must* be a fill factor; that's how B-tree, hash, GiST and SP-GiST
indices work.

The default fill factor is 90%; thus, to "remove" your custom fill factor,
set it to 90%.

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