> For the complete documentation index, see [llms.txt](https://mariadb.com/docs/llms.txt). Markdown versions of documentation pages are available by appending `.md` to page URLs; this page is available as [Markdown](https://mariadb.com/docs/server/reference/clientserver-protocol/replication-protocol/rand_event.md).

# RAND\_EVENT

The SQL function [RAND()](/docs/server/reference/sql-functions/numeric-functions/rand.md) generates a random number.

A `RAND_EVENT` contains two seed values that set the [rand\_seed1](/docs/server/server-management/variables-and-modes/server-system-variables.md#rand_seed1) and [rand\_seed2](/docs/server/server-management/variables-and-modes/server-system-variables.md#rand_seed2) system variables that are used to compute the random number.

{% hint style="info" %}
It is written only before a `QUERY_EVENT` , and not used with row-based logging.
{% endhint %}

## Header

* Event Type is `13` (`0x0d`).

## Fields

* [uint<8>](/docs/server/reference/clientserver-protocol/protocol-data-types.md#fixed-length-integers) The value for the first seed.
* [uint<8>](/docs/server/reference/clientserver-protocol/protocol-data-types.md#fixed-length-integers) The value for the second seed.

## Example From mysqlbinlog Utility, No CRC32

```sql
# at 389
#171206 13:46:56 server id 10116  end_log_pos 424 	Rand
SET @@RAND_SEED1=685157301, @@RAND_SEED2=758850369/*!*/;
# at 424
```

## Example Event as Written to the Binlog File

`c0 e6 27 5a 0d 84 27 00 00 23 00 00 00 a8 01 00 ..'Z..'..#...... 00 00 00 b5 ab d6 28 00 00 00 00 41 23 3b 2d 00 ......(......... 00 00 00 ....`

<sub>*This page is licensed: CC BY-SA / Gnu FDL*</sub>

{% @marketo/form formId="4316" %}


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