On 2025/07/11 2:57, Jeff Davis wrote:
On Wed, 2025-06-25 at 08:18 +0900, Fujii Masao wrote:
For pg_dump and pg_dumpall, I agree with Jeff's idea in [1],
but if the statistics is skipped by default, I don't think
we need a --no-statistics option. So, here's how I think
the options should work:

      * Keep: --schema-only, --data-only, --statistics-only, --no-
schema, --no-data, -and -statistics
      * Remove: --no-statistics, --with-schema, and --with-data

...

For pg_restore, I believe there's agreement to restore statistics
by default if they exist in the archive. So:

      * Keep: --schema-only, --data-only, --statistics-only, --no-
schema, --no-data, and --no-statistics
      * Remove: --with-schema, --with-data, and --statistics

That means pg_dump will accept --statistics and reject --no-statistics;
and pg_restore will accept --no-statistics and reject --statistics.
Other options are mostly the same between them, so I'm not sure it's a
good idea for them to diverge.

I agree it would be better to have the same options in both pg_dump
and pg_restore, if possible.

But to do that, we'd either need to make pg_dump dump statistics
by default, or allow redundant options like --statistics in pg_restore,
even though it already restores statistics by default.

As I understand it, the rough consensus so far is that we'd prefer to
avoid both of these approaches. I know some want to change the default
behavior about statistics in pg_dump, though.

But, are you suggesting we go with one of them?

Regards,

--
Fujii Masao
NTT DATA Japan Corporation



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