Alvaro Herrera <alvhe...@commandprompt.com> wrote:

> > We should remember whether a field was specified or not independntly.
> I'm not sure what you are suggesting ...?

Please imagine that:

=# SET autovacuum_vacuum_scale_factor = 0.05;
=# ALTER TABLE tbl SET (autovacuum_vacuum_threshold = 10);

AutoVacOpts.vacuum_threshold should be 10 (comes from reloptions),
but AutoVacOpts.vacuum_scale_factor should be <DEFAULT> (comes from GUC).

If we use boolean flags, we need booleans for each fields in AutoVacOpts.
(vacuum_threshold_is_default, vacuum_scale_factor_is_default, ...)

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



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