mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-11-15 20:24:07 +00:00
31 lines
1.1 KiB
Markdown
31 lines
1.1 KiB
Markdown
---
|
|
slug: /en/operations/startup-scripts
|
|
sidebar_label: Startup Scripts
|
|
---
|
|
|
|
# Startup Scripts
|
|
|
|
ClickHouse can run arbitrary SQL queries from the server configuration during startup. This can be useful for migrations or automatic schema creation.
|
|
|
|
```xml
|
|
<clickhouse>
|
|
<startup_scripts>
|
|
<scripts>
|
|
<query>CREATE ROLE OR REPLACE test_role</query>
|
|
</scripts>
|
|
<scripts>
|
|
<query>CREATE TABLE TestTable (id UInt64) ENGINE=TinyLog</query>
|
|
<condition>SELECT 1;</condition>
|
|
</scripts>
|
|
</startup_scripts>
|
|
</clickhouse>
|
|
```
|
|
|
|
ClickHouse executes all queries from the `startup_scripts` sequentially in the specified order. If any of the queries fail, the execution of the following queries won't be interrupted.
|
|
|
|
You can specify a conditional query in the config. In that case, the corresponding query executes only when the condition query returns the value `1` or `true`.
|
|
|
|
:::note
|
|
If the condition query returns any other value than `1` or `true`, the result will be interpreted as `false`, and the corresponding won't be executed.
|
|
:::
|