27 lines
802 B
Markdown
27 lines
802 B
Markdown
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# Verifying Database Capabilities
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Sometimes certain bits of code may only work on a certain database and/or
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version. While we try to avoid such code as much as possible sometimes it is
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necessary to add database (version) specific behaviour.
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To facilitate this we have the following methods that you can use:
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* `Gitlab::Database.postgresql?`: returns `true` if PostgreSQL is being used
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* `Gitlab::Database.mysql?`: returns `true` if MySQL is being used
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* `Gitlab::Database.version`: returns the PostgreSQL version number as a string
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in the format `X.Y.Z`. This method does not work for MySQL
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This allows you to write code such as:
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```ruby
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if Gitlab::Database.postgresql?
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if Gitlab::Database.version.to_f >= 9.6
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run_really_fast_query
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else
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run_fast_query
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end
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else
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run_query
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end
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```
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