IMPORTANT: Version 6.6 of Elasticsearch has passed its maintenance date.
This documentation is no longer being updated. For the latest information, see the current release documentation.
null value cannot be indexed or searched. When a field is set to
(or an empty array or an array of
null values) it is treated as though that
field has no values.
null_value parameter allows you to replace explicit
null values with
the specified value so that it can be indexed and searched. For instance:
An empty array does not contain an explicit
A query for
null_value needs to be the same datatype as the field. For
long field cannot have a string
null_value only influences how data is indexed, it doesn’t modify