How is the addition of a new field to a document handled by ElasticSearch?

Feel free to correct me if the basics are off in some parts of this
question:

Given that a JSON document like this is indexed by ES:
[
{
name:"watch",
type:"rolex"
},
{
name:"apple",
type:"fruit"
}
]

Q1) What happens when a new field is added to new data and needs to be
indexed?
For example:
[
{
name:"hoola-hoop",
type:"toy"
store:"toys-r-us"
}
]
Is this data still stored in the same index?

Q2) What happens if the newly added field is something that ES founds
out about through a CouchDB stream? Like the Rolex watch having a
newly added {store:"watches-r-us"} field, then is the existing index
entry deleted and re-added in the same index?

if the entry has the same id it gets updated. otherwise if you use
auto id creation you'll have duplicate entries in the index

Also, new field are automatically mapped and added, with mapping
automatically (or with dynamic templates) automatically set for them.

On Mon, Oct 17, 2011 at 10:40 PM, Karussell tableyourtime@googlemail.comwrote:

if the entry has the same id it gets updated. otherwise if you use
auto id creation you'll have duplicate entries in the index