[Docs] Note that wildcard field supports `null_value`

2020-11-05 18:01:28 +00:00 · 2020-11-05 18:01:28 +00:00 · f2179fc3e8
parent 358c522f16
commit f2179fc3e8
1 changed files with 5 additions and 0 deletions
--- a/docs/reference/mapping/types/wildcard.asciidoc
+++ b/docs/reference/mapping/types/wildcard.asciidoc
@ -58,6 +58,11 @@ The following parameters are accepted by `wildcard` fields:

 [horizontal]

+<<null-value,`null_value`>>::
+
+    Accepts a string value which is substituted for any explicit `null`
+    values.  Defaults to `null`, which means the field is treated as missing.
+
 <<ignore-above,`ignore_above`>>::

    Do not index any string longer than this value.  Defaults to `2147483647`