ZLIB\_DECOMPRESS(1) MySQL Database System ZLIB\_DECOMPRESS(1)

# [NAME](#NAME)

zlib\_decompress - decompress mysqlpump ZLIB-compressed output

# [SYNOPSIS](#SYNOPSIS)

**zlib\_decompress input\_file output\_file**

# [DESCRIPTION](#DESCRIPTION)

The **zlib\_decompress** utility decompresses **mysqlpump** output that was created using ZLIB compression.

**Note**

**zlib\_decompress** is deprecated as of MySQL 8.0.34; expect it to be removed in a future version of MySQL. This is because the associated **mysqlpump** utility is deprecated as of MySQL 8.0.34.

**Note**

If MySQL was configured with the **-DWITH\_ZLIB=system** option, **zlib\_decompress** is not built. In this case, the system **openssl zlib** command can be used instead.

Invoke **zlib\_decompress** like this:

```
zlib_decompress input_file output_file
```

Example:

```
mysqlpump --compress-output=ZLIB > dump.zlib
zlib_decompress dump.zlib dump.txt
```

To see a help message, invoke **zlib\_decompress** with no arguments.

To decompress **mysqlpump** LZ4-compressed output, use **lz4\_decompress**. See [lz4\_decompress(1)](/man/enterprise-packages/mysql-8.0/lz4_decompress.1).

# [COPYRIGHT](#COPYRIGHT)

Copyright © 1997, 2026, Oracle and/or its affiliates.

This documentation is free software; you can redistribute it and/or modify it only under the terms of the GNU General Public License as published by the Free Software Foundation; version 2 of the License.

This documentation is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License for more details.

You should have received a copy of the GNU General Public License along with the program; if not, write to the Free Software Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301 USA or see http://www.gnu.org/licenses/.

# [SEE ALSO](#SEE_ALSO)

For more information, please refer to the MySQL Reference Manual, which may already be installed locally and which is also available online at http://dev.mysql.com/doc/.

# [AUTHOR](#AUTHOR)

Oracle Corporation (http://dev.mysql.com/).

03/23/2026 MySQL 8.0

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Document: zlib_decompress(1) from mysql-8.0 8.0.46-r10 (Chainguard OS)
Source: https://github.com/mysql/mysql-server