From c26be6ebcd62a74b27e670df4abc5916d573acff Mon Sep 17 00:00:00 2001
From: Abby <78209557+abby-cyber@users.noreply.github.com>
Date: Wed, 1 Mar 2023 18:12:52 +0800
Subject: [PATCH 1/2] properties()-function-reduces-query-performance

---
 .../6.functions-and-expressions/4.schema.md     | 17 +++++++++++++++++
 1 file changed, 17 insertions(+)

diff --git a/docs-2.0/3.ngql-guide/6.functions-and-expressions/4.schema.md b/docs-2.0/3.ngql-guide/6.functions-and-expressions/4.schema.md
index 89a1c26d84f..686d5bce028 100644
--- a/docs-2.0/3.ngql-guide/6.functions-and-expressions/4.schema.md
+++ b/docs-2.0/3.ngql-guide/6.functions-and-expressions/4.schema.md
@@ -51,6 +51,19 @@ nebula> LOOKUP ON player WHERE player.age  > 45 \
 +-------------------------------------+
 ```
 
+You can also use the property reference symbols (`$^` and `$$`) instead of the `vertex` field in the `properties()` function to get all properties of a vertex.
+
+- `$^` represents the data of the starting vertex at the beginning of exploration. For example, in `GO FROM "player100" OVER follow reversely YIELD properties($^)`, `$^` refers to the vertex `player100`.
+
+- `$$` represents the data of the end vertex at the end of exploration.
+
+`properties($^)` and `properties($$)` are generally used in `GO` statements. For more information, see [Property reference](../5.operators/5.property-reference.md).
+
+!!! caution
+
+    Users can use `properties().<property_name>` to get a specific property of a vertex. However, it is not recommended to use this method to obtain specific properties because the `properties()` function returns all properties, which can decrease query performance.
+
+
 ### properties(edge)
 
 properties(edge) returns the properties of an edge.
@@ -72,6 +85,10 @@ nebula> GO FROM "player100" OVER follow \
 +------------------+
 ```
 
+!!! caution
+
+    Users can use `properties(edge).<property_name>` to get a specific property of an edge. However, it is not recommended to use this method to obtain specific properties because the `properties(edge)` function returns all properties, which can decrease query performance.
+
 ### type(edge)
 
 type(edge) returns the edge type of an edge.

From 5bbcb87cdf9c75c9625bcf4b912edd3a2a8cdcb3 Mon Sep 17 00:00:00 2001
From: Abby <78209557+abby-cyber@users.noreply.github.com>
Date: Thu, 2 Mar 2023 09:27:46 +0800
Subject: [PATCH 2/2] Update 4.schema.md

---
 docs-2.0/3.ngql-guide/6.functions-and-expressions/4.schema.md | 4 ++--
 1 file changed, 2 insertions(+), 2 deletions(-)

diff --git a/docs-2.0/3.ngql-guide/6.functions-and-expressions/4.schema.md b/docs-2.0/3.ngql-guide/6.functions-and-expressions/4.schema.md
index 686d5bce028..e6dd6f69523 100644
--- a/docs-2.0/3.ngql-guide/6.functions-and-expressions/4.schema.md
+++ b/docs-2.0/3.ngql-guide/6.functions-and-expressions/4.schema.md
@@ -61,7 +61,7 @@ You can also use the property reference symbols (`$^` and `$$`) instead of the `
 
 !!! caution
 
-    Users can use `properties().<property_name>` to get a specific property of a vertex. However, it is not recommended to use this method to obtain specific properties because the `properties()` function returns all properties, which can decrease query performance.
+    You can use `properties().<property_name>` to get a specific property of a vertex. However, it is not recommended to use this method to obtain specific properties because the `properties()` function returns all properties, which can decrease query performance.
 
 
 ### properties(edge)
@@ -87,7 +87,7 @@ nebula> GO FROM "player100" OVER follow \
 
 !!! caution
 
-    Users can use `properties(edge).<property_name>` to get a specific property of an edge. However, it is not recommended to use this method to obtain specific properties because the `properties(edge)` function returns all properties, which can decrease query performance.
+    You can use `properties(edge).<property_name>` to get a specific property of an edge. However, it is not recommended to use this method to obtain specific properties because the `properties(edge)` function returns all properties, which can decrease query performance.
 
 ### type(edge)