WARNING: Version 5.0 of Elasticsearch has passed its EOL date.
This documentation is no longer being maintained and may be removed. If you are running this version, we strongly advise you to upgrade. For the latest information, see the current release documentation.
String datatype
editString datatype
editThe string
field is unsupported for indexes created in 5.x in favor of the
text
and keyword
fields. Attempting to create a string field in an index
created in 5.x will cause Elasticsearch to attempt to upgrade the string
into
the appropriate text
or keyword
field. It will return an HTTP Warning
header telling you that string
is deprecated. This upgrade process isn’t
always perfect because there are some combinations of features that are
supported by string
but not text
or keyword
. For that reason it is better
to use text
or keyword
.
Indexes imported from 2.x only support string
and not text
or keyword
.
To ease the migration from 2.x Elasticsearch will downgrade text
and keyword
mappings applied to indexes imported from 2.x into string
. While long lived
indexes will eventually need to be recreated against 5.x before eventually
upgrading to 6.x, this downgrading smooths the process before you find time for
it.