Splunk® Cloud Services

SPL2 Search Reference

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rex command examples

The following are examples for using the SPL2 rex command. To learn more about the rex command, see How the rex command works.

1. Use a <sed-expression>

Use a <sed-expression> to match the regex to a series of numbers and replace the numbers with an anonymized string. In this example the first 3 sets of numbers for a credit card will be anonymized. The \d must be escaped in the expression using a back slash ( \ ) character.

... | rex field=ccnumber mode=sed "s/(\\d{4}-){3}/XXXX-XXXX-XXXX-/g"

2. Extract values from a field using a <regex-expression>

Extract "user", "app" and "SavedSearchName" from a field called "savedsearch_id" in scheduler.log events. If the contents of the field is savedsearch_id=bob;search;my_saved_search then this rex command syntax extracts user=bob, app=search, and SavedSearchName=my_saved_search.

... | rex field=savedsearch_id "(?<user>\w+);(?<app>\w+);(?<SavedSearchName>\w+)"

See also

rex command
rex command overview
rex command syntax details
rex command usage
Last modified on 04 October, 2021
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This documentation applies to the following versions of Splunk® Cloud Services: current


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