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docs: regex processor only works on strings (#10982)

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Joshua Powers 2022-04-19 07:22:03 -06:00 committed by GitHub
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plugins/processors/regex/README.md
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@ -2,6 +2,9 @@
The `regex` plugin transforms tag and field values with regex pattern. If `result_key` parameter is present, it can produce new tags and fields from existing ones.
The regex processor **only operates on string fields**. It will not work on
any other data types, like an integer or float.
For tags transforms, if `append` is set to `true`, it will append the transformation to the existing tag value, instead of overwriting it.
For metrics transforms, `key` denotes the element that should be transformed. Furthermore, `result_key` allows control over the behavior applied in case the resulting `tag` or `field` name already exists.