Splunk® Data Stream Processor

Function Reference

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On October 30, 2022, all 1.2.x versions of the Splunk Data Stream Processor will reach its end of support date. See the Splunk Software Support Policy for details. For information about upgrading to a supported version, see the Upgrade the Splunk Data Stream Processor topic.
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This topic describes how to use the function in the .


The Fields function 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: -


Examples of common use cases follow. These examples assume that you have added the function to your pipeline.

1. SPL2 Example: Specify a list of fields to keep in your records

This example assumes that you are in the SPL View.

Return only the host, source, and body fields.

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

2. SPL2 Example: Specify a list of fields to remove from your records

This example assumes that you are in the SPL View.

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 09 February, 2022
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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-patch02, 1.2.1, 1.2.2-patch02, 1.2.4, 1.2.5, 1.3.0, 1.3.1, 1.4.0, 1.4.1, 1.4.2, 1.4.3

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