Dear Wang,

Thank you for reviewing! PSA new version.

> 1. In the function getLogicalReplicationSlots
> ```
> +             /*
> +              * Note: Currently we do not have any options to include/exclude
> slots
> +              * in dumping, so all the slots must be selected.
> +              */
> +             slotinfo[i].dobj.dump = DUMP_COMPONENT_ALL;
> ```
> I think currently we are only dumping the definition of logical replication
> slots. It seems better to set it as DUMP_COMPONENT_DEFINITION here.

Right. Actually it was harmless because another flags like 
DUMP_COMPONENT_DEFINITION
are not checked in dumpLogicalReplicationSlot(), but changed.

> 2. In the function dumpLogicalReplicationSlot
> ```
> +             ArchiveEntry(fout, slotinfo->dobj.catId, slotinfo->dobj.dumpId,
> +                                      ARCHIVE_OPTS(.tag = slotname,
> +
>         .description = "REPLICATION SLOT",
> +                                                               .section =
> SECTION_POST_DATA,
> +
>         .createStmt = query->data));
> ```
> I think if we do not set the member dropStmt in macro ARCHIVE_OPTS here, when
> we
> specifying the option "--logical-replication-slots-only" and option 
> "-c/--clean"
> together, the "-c/--clean" will not work.
> 
> I think that we could use the function pg_drop_replication_slot to set this
> member. Then, in the main function in the pg_dump.c file, we should add a 
> check
> to prevent specifying option "--logical-replication-slots-only" and
> option "--if-exists" together.
> Or, we could simply add a check to prevent specifying option
> "--logical-replication-slots-only" and option "-c/--clean" together.
> What do you think?

I chose not to allow to combine with -c. Assuming that this option is used only
by the pg_upgrade, it is ensured that new node does not have any logical 
replication
slots. So the remove function is not needed.

Best Regards,
Hayato Kuroda
FUJITSU LIMITED

Attachment: v12-0001-pg_upgrade-Add-include-logical-replication-slots.patch
Description: v12-0001-pg_upgrade-Add-include-logical-replication-slots.patch

Attachment: v12-0002-Always-persist-to-disk-logical-slots-during-a-sh.patch
Description: v12-0002-Always-persist-to-disk-logical-slots-during-a-sh.patch

Attachment: v12-0003-pg_upgrade-Add-check-function-for-include-logica.patch
Description: v12-0003-pg_upgrade-Add-check-function-for-include-logica.patch

Attachment: v12-0004-Change-the-method-used-to-check-logical-replicat.patch
Description: v12-0004-Change-the-method-used-to-check-logical-replicat.patch

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