Splunk® Data Stream Processor

Function Reference

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This topic describes how to use the function in the .


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: <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.
Example in Canvas View: host, source, body

Optional arguments

Syntax: + | -
Description: If the plus sign ( + ) is specified, only the fields in the field_list are kept in the results. If the minus sign ( - ) 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: +
Example in Canvas View: -

SPL2 examples

Examples of common use cases follow. The following examples assume that you are in the SPL View.

When working in the SPL View, you can write the function by using the syntax shown in each use case.

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 minus sign ( - ) to specify which fields to remove from your incoming records. This example removes the host field from the records:

... | fields - host | ...
Last modified on 20 April, 2021
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This documentation applies to the following versions of Splunk® Data Stream Processor: 1.1.0, 1.2.0, 1.2.1

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