---
name: "mongoc_bulkwrite_replaceoneopts_set_upsert"
section: "3"
platform: "linux"
package: "libmongoc-doc"
version: "1.30.4-1+deb13u3"
release: "Debian 13 (Trixie)"
platforms: ["linux"]
url: "https://new.carta.tech/mongoc_bulkwrite_replaceoneopts_set_upsert"
---

# mongoc\_bulkwrite\_replaceoneopts\_set\_upsert(3)

## SYNOPSIS

```
void
mongoc_bulkwrite_replaceoneopts_set_upsert (mongoc_bulkwrite_replaceoneopts_t *self, bool upsert);
```

## DESCRIPTION

If **upsert** is true, creates a new document if no document matches the query.

The **upsert** option is not sent if this function is not called. The server's default value is false.

## AUTHOR

MongoDB, Inc

## COPYRIGHT

2009-present, MongoDB, Inc.