diff --git a/docs-2.0/3.ngql-guide/7.general-query-statements/optional-match.md b/docs-2.0/3.ngql-guide/7.general-query-statements/optional-match.md
index 69885a3a402..5dca761e716 100644
--- a/docs-2.0/3.ngql-guide/7.general-query-statements/optional-match.md
+++ b/docs-2.0/3.ngql-guide/7.general-query-statements/optional-match.md
@@ -1,5 +1,9 @@
 # OPTIONAL MATCH
 
+!!! caution
+
+    The feature is still in beta. It will continue to be optimized.
+
 The `OPTIONAL MATCH` clause is used to search for the pattern described in it. `OPTIONAL MATCH` matches patterns against your graph database, just like `MATCH` does. The difference is that if no matches are found, `OPTIONAL MATCH` will use a null for missing parts of the pattern.
 
 ## OpenCypher Compatibility
@@ -36,4 +40,4 @@ nebula> MATCH (m)-[]->(n) WHERE id(m)=="player100" \
 | "player100" | "player125" | "team204"   |
 | "player100" | "player125" | "player100" |
 +-------------+-------------+-------------+
-```
\ No newline at end of file
+```