Splunk® Data Stream Processor

Function Reference

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This topic describes how to use the function in the Splunk Data Stream Processor.


Keeps or removes fields from your data based on the field list criteria.

Function Input/Output Schema

Function Input
This function takes in collections of records with schema R.
Function Output
This function outputs the same collection of records but with a different schema S.


The required fields are in bold font.

fields [+|-] <field_list>

Required arguments

+ | -
Syntax: + | -
Description: If the plus ( + ) symbol is specified, only the fields in the field_list are kept in the results. If the negative ( - ) symbol is specified, the fields in the field_list are removed from the results. The symbol you specify applies to all of the fields in the field_list.
Default: +
Syntax: <field>, <field>, ...
Description: Comma-delimited list of fields to keep or remove. You can use a wild card character in the field names, but must enclose those field names in single quotation marks.

SPL2 examples

Examples of common use cases follow:

1. Specify a list of fields to keep in your records

Return only the host, source, and body fields.

... | fields host, source, body | ...

2. Specify a list of fields to remove from your records

Use the negative ( - ) symbol to specify which fields to remove from your incoming records. In this example, remove the host field from the records.

... | fields - host | ...
Last modified on 06 November, 2020
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This documentation applies to the following versions of Splunk® Data Stream Processor: 1.1.0, 1.2.0

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