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Caution

Grafana Alloy is the new name for our distribution of the OTel collector. Grafana Agent has been deprecated and is in Long-Term Support (LTS) through October 31, 2025. Grafana Agent will reach an End-of-Life (EOL) on November 1, 2025. Read more about why we recommend migrating to Grafana Alloy.

Important: This documentation is about an older version. It's relevant only to the release noted, many of the features and functions have been updated or replaced. Please view the current version.

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concat

The concat function concatenates one or more lists of values into a single list. Each argument to concat must be a list value. Elements within the list can be any type.

Examples

> concat([])
[]

> concat([1, 2], [3, 4])
[1, 2, 3, 4]

> concat([1, 2], [], [bool, null])
[1, 2, bool, null]

> concat([[1, 2], [3, 4]], [[5, 6]])
[[1, 2], [3, 4], [5, 6]]