Replaces the fields matching the given extractors with fixed values.
replace operator mutates existing fields by providing a new value.
The difference between
extend is that
overwrites existing fields, whereas
extend doesn't touch the input.
The assignment consists of an
extractor that matches against existing fields
operand that defines the new field value.
field does not exist in the input, the operator degenerates to
Replace the field the field
src_ip with a fixed value:
Replace all IP address with a fixed value: