# INTVAR\_EVENT

An `INTVAR_EVENT` is written every time a statement uses an auto increment column or the `LAST_INSERT_ID()` function.

## Header

* Event Type is `5` (`0x05`).

## Fields

* [uint<1>](/docs/server/reference/clientserver-protocol/protocol-data-types.md#fixed-length-integers) Type.
* [uint<8>](/docs/server/reference/clientserver-protocol/protocol-data-types.md#fixed-length-integers) Value.

## Type

| 0x00 | Invalid value.               |
| ---- | ---------------------------- |
| 0x01 | LAST\_INSERT\_ID.            |
| 0x02 | Insert id (auto\_increment). |

## Example From mysqlbinlog Utility, CRC32

```sql
# at 738
#180610 11:20:56 server id 1  end_log_pos 770 CRC32 0xf5a23f2d 	Intvar
SET LAST_INSERT_ID=1/*!*/;
```

## Example Event As It's Written In The Binlog File

```
78 ed 1c 5b 05 01 00 00 00 20 00       x..[..... .
00 00 02 03 00 00 00 00 01 01 00 00 00 00 00 00  ................
00 2d 3f a2 f5                                   .-?..
```

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