copy_from option on set processor links rather than copies complex content #69348
Description
Elasticsearch version (bin/elasticsearch --version): 7.11.0+
Steps to reproduce:
POST _ingest/pipeline/_simulate
{
"pipeline": {
"processors": [
{
"set": {
"field": "foo2",
"copy_from": "foo"
}
},
{
"set": {
"field": "foo2.bar",
"value": "changed"
}
}
]
},
"docs": [
{
"_source": {
"foo": {
"bar": "baz"
}
}
}
]
}
produces:
"_source" : {
"foo2" : {
"bar" : "changed"
},
"foo" : {
"bar" : "changed"
}
}
which shows that foo2 is linked to the content of foo and cannot be changed independently.