logstash/logstash — pull request #362 by gza (2013-02-15 13:55:00+00:00)
Title: New function for mutate filter

it merges two fields or arrays or hashes in the first one
Strings fields will be converted in array, so
- array + string will work
- string + string will result in an 2 entry array in dest_field
- array and hash will not work

examples
mutate {
# tags_field = "tag1,tag2,tag3"

+ # merge => ["@tags", "tags_fields"]
+ # }
+ # }