Jim Ferenczi d6445fae4b Add a cluster setting to disallow loading fielddata on _id field (#49166) ... This change adds a dynamic cluster setting named `indices.id_field_data.enabled`. When set to `false` any attempt to load the fielddata for the `_id` field will fail with an exception. The default value in this change is set to `false` in order to prevent fielddata usage on this field for future versions but it will be set to `true` when backporting to 7x. When the setting is set to true (manually or by default in 7x) the loading will also issue a deprecation warning since we want to disallow fielddata entirely when https://github.com/elastic/elasticsearch/issues/26472 is implemented. Closes #43599		2019-11-28 09:35:28 +01:00
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main	(refactor) Extract Empty/Script/Missing ValuesSource behavior to an interface (#48320) (#49330)	2019-11-19 16:44:29 -05:00
test	Add a cluster setting to disallow loading fielddata on _id field (#49166)	2019-11-28 09:35:28 +01:00