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extract

Description

Extracts field-value pairs from the search results. 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.

Syntax

extract [<extract-options>... ] [<extractor-name>...]

Required arguments

None.

Optional arguments

<extract-options>
Syntax: clean_keys=<bool> | kvdelim=<string> | limit=<int> | maxchars=<int> | mv_add=<bool> | pairdelim=<string> | reload=<bool> | segment=<bool>
Description: Options for defining the extraction. See the Extract_options section in this topic.
<extractor-name>
Syntax: <string>
Description: A stanza in the transforms.conf file. This is used when the props.conf file does not explicitly cause an extraction for this source, sourcetype, or host.

Extract options

clean_keys
Syntax: clean_keys=<bool>
Description: Specifies whether to clean keys. Overrides CLEAN_KEYS in the transforms.conf file.
Default: The value specified in the CLEAN_KEYS in the transforms.conf file.
kvdelim
Syntax: kvdelim=<string>
Description: A list of character delimiters that separate the key from the value.
limit
Syntax: limit=<int>
Description: Specifies how many automatic key-value pairs to extract.
Default: 50
maxchars
Syntax: maxchars=<int>
Description: Specifies how many characters to look into the event.
Default: 10240
mv_add
Syntax: mv_add=<bool>
Description: Specifies whether to create multivalued fields. Overrides the value for the MV_ADD parameter in the transforms.conf file.
Default: false
pairdelim
Syntax: pairdelim=<string>
Description: A list of character delimiters that separate the key-value pairs from each other.
reload
Syntax: reload=<bool>
Description: Specifies whether to force reloading of the props.conf and transforms.conf files.
Default: false
segment
Syntax: segment=<bool>
Description: Specifies whether to note the locations of the key-value pairs with the results.
Default: false

Usage

The extract command is a distributable streaming command. See Command types.

Alias

The alias for the extract command is kv.

Examples

1. Specify the delimiters to use for the field and value extractions

Extract field-value pairs that are delimited by the pipe or semicolon characters ( |; ). Extract values of the fields that are delimited by the equal or colon characters ( =: ). The delimiters are individual characters. In this example the "=" or ":" character is used to delimit the key value. Similarly, a "|" or ";" is used to delimit the field-value pair itself.

... | extract pairdelim="|;", kvdelim="=:"

2. Extract field-value pairs and reload the field extraction settings

Extract field-value pairs and reload field extraction settings from disk.

... | extract reload=true

3. Rename a field to _raw to extract from that field

Rename the _raw field to a temporary name. Rename the field you want to extract from, to _raw. In this example the field name is uri_query.

... | rename _raw AS temp uri_query AS _raw | extract pairdelim="?&" kvdelim="=" | rename _raw AS uri_query temp AS _raw

4. Extract field-value pairs from a stanza in the transforms.conf file

Extract field-value pairs that are defined in the stanza 'access-extractions' in the transforms.conf file.

... | extract access-extractions

See also

kvform, multikv, rex, spath, xmlkv, xpath

Last modified on 21 July, 2020
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This documentation applies to the following versions of Splunk Cloud: 7.2.7, 7.2.8, 7.2.9, 7.2.10, 8.0.2006, 8.0.2007, 8.1.2008, 8.1.2009, 8.1.2011


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