Web Reference: The extract command works only on the _raw field. If you want to extract from another field, you must perform some field renaming before you run the extract command. 🔍 Master the substr command in Splunk SPL with this comprehensive tutorial! Learn how to extract specific portions of strings using start positions and length parameters. ...more Feb 6, 2025 · As @ITWhisperer points out, neither substring or regex is the correct tool to extract information from structured data such as JSON. I assume that that so-called "string" is not the entire event because otherwise Splunk would have automatically extracted role at search time.
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