A field alias is created where field1--fieid2 and the Overwrite Field Values checkbox is selected. What happens if an event only contains values for fieid1?

The correct answer is D. field2 values are replaced with the value of the field. A field alias maps one field name to another (here, field1 → field2). When the 'Overwrite Field Values' checkbox is selected, the alias will replace any existing value in the target field (field2) with the value from the source field (field1). If an event contains only field1…

Creating Field Aliases and Calculated Fields

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Afield2 values are removed from the events.
Bfield1 and field2 values are merged.
Cfield2 values are unchanged.
Dfield2 values are replaced with the value of the field.

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A
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B
2% (1)
C
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D
93% (57)

Explanation

A field alias maps one field name to another (here, field1 → field2). When the 'Overwrite Field Values' checkbox is selected, the alias will replace any existing value in the target field (field2) with the value from the source field (field1). If an event contains only field1 (no existing field2 value), field2 is created and populated with field1's value - effectively overwriting (or initializing) field2 with what field1 holds.

Topics

#Field Aliases#Overwrite Field Values#Field Manipulation#Splunk Knowledge Objects

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