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55 lines
1.8 KiB
Markdown
55 lines
1.8 KiB
Markdown
---
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slug: /en/interfaces/mysql
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sidebar_position: 20
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sidebar_label: MySQL Interface
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---
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# MySQL Interface
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ClickHouse supports MySQL wire protocol. It can be enabled by [mysql_port](../operations/server-configuration-parameters/settings.md#server_configuration_parameters-mysql_port) setting in configuration file:
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``` xml
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<mysql_port>9004</mysql_port>
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```
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Example of connecting using command-line tool `mysql`:
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``` bash
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$ mysql --protocol tcp -u default -P 9004
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```
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Output if a connection succeeded:
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``` text
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Welcome to the MySQL monitor. Commands end with ; or \g.
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Your MySQL connection id is 4
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Server version: 20.2.1.1-ClickHouse
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Copyright (c) 2000, 2019, Oracle and/or its affiliates. All rights reserved.
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Oracle is a registered trademark of Oracle Corporation and/or its
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affiliates. Other names may be trademarks of their respective
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owners.
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Type 'help;' or '\h' for help. Type '\c' to clear the current input statement.
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mysql>
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```
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For compatibility with all MySQL clients, it is recommended to specify user password with [double SHA1](../operations/settings/settings-users.md#password_double_sha1_hex) in configuration file.
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If user password is specified using [SHA256](../operations/settings/settings-users.md#password_sha256_hex), some clients won’t be able to authenticate (mysqljs and old versions of command-line tool MySQL and MariaDB).
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Restrictions:
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- prepared queries are not supported
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- some data types are sent as strings
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To cancel a long query use `KILL QUERY connection_id` statement (it is replaced with `KILL QUERY WHERE query_id = connection_id` while proceeding). For example:
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``` bash
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$ mysql --protocol tcp -h mysql_server -P 9004 default -u default --password=123 -e "KILL QUERY 123456;"
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```
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[Original article](https://clickhouse.com/docs/en/interfaces/mysql/) <!--hide-->
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