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

# bson\_append\_timestamp(3)

## SYNOPSIS

```
#define BSON_APPEND_TIMESTAMP(b, key, val, inc) \
   bson_append_timestamp (b, key, (int) strlen (key), val, inc)
bool
bson_append_timestamp (bson_t *bson,
                       const char *key,
                       int key_length,
                       uint32_t timestamp,
                       uint32_t increment);
```

## PARAMETERS

- •

  **bson**: A *bson\_t*.

- •

  **key**: An ASCII C string containing the name of the field.

- •

  **key\_length**: The length of **key** in bytes, or -1 to determine the length with **strlen()**.

- •

  **timestamp**: A uint32\_t.

- •

  **increment**: A uint32\_t.

## DESCRIPTION

This function is not similar in functionality to *bson\_append\_date\_time()*. Timestamp elements are different in that they include only second precision and an increment field.

They are primarily used for intra-MongoDB server communication.

The *bson\_append\_timestamp()* function shall append a new element of type BSON\_TYPE\_TIMESTAMP.

## RETURNS

Returns **true** if the operation was applied successfully. The function will fail if appending the value grows **bson** larger than INT32\_MAX.

## AUTHOR

MongoDB, Inc

## COPYRIGHT

2009-present, MongoDB, Inc.