What exactly is `returnGeneratedKeys` from the opt...

# komapper

[S.]

What exactly is returnGeneratedKeys from the options here onDuplicateKeyUpdate().multiple().options supposed to do? The query still returns a single Long value. Essentially I'm trying to bulk insert and retrieve all IDs with postgresql

[S.]

and the batch method sadly isn't available for the postgres driver

[S.]

so ideally there would be an option for the returning keyword

[Toshihiro Nakamura]

If you are using PostgreSQL, this option is rarely useful. However, SQL Server, for example, does not support returning the ID generated by bulk insert. So you need to set the returnGeneratedKeys option to false for a successful bulk insert.

[S.]

I see.
so the only two options are script query or look through multiple executeAndGet to achieve what I want?

[Toshihiro Nakamura]

Hmmm. As far as I know, PostgreSQL returns all generated IDs with bulk insert. Can you show me your code?

[S.]

QueryDsl.insert(table).onDuplicateKeyUpdate(table.userId, table.title).multiple(entities)

returns a Long of how many columns have been inserted/updated

[S.]

insert into table (userId, title) values(a, b) returning id

is what I'm looking for

[Toshihiro Nakamura]

I see. I had inadvertently forgotten that you are using onDuplicateKeyUpdate. In that case, you certainly need to use either script query or executeAndGet. Currently Komapper does not support the returning keyword.

[S.]

yeah I need it for this query. I guess the loop will do for now, thank you