Support the tck format for the output of EXPLAIN

docs-2.0/3.ngql-guide/17.query-tuning-statements/1.explain-and-profile.md

@@ -17,18 +17,18 @@
 - `EXPLAIN`
 
     ```ngql
-    EXPLAIN [format= {"row" | "dot"}] <your_nGQL_statement>;
+    EXPLAIN [format= {"row" | "dot" | "tck"}] <your_nGQL_statement>;
     ```
 
 - `PROFILE`
 
     ```ngql
-    PROFILE [format= {"row" | "dot"}] <your_nGQL_statement>;
+    PROFILE [format= {"row" | "dot" | "tck"}] <your_nGQL_statement>;
     ```
 
 ## 输出格式
 
-`EXPLAIN`或`PROFILE`语句的输出有两种格式：`row`（默认）和`dot`。用户可以使用`format`选项修改输出格式。
+`EXPLAIN`或`PROFILE`语句的输出有三种格式：`row`（默认）、`dot`和`tck`。用户可以使用`format`选项修改输出格式。
 
 ## `row`格式
 
@@ -111,3 +111,52 @@ Execution Plan
 将上述示例的 DOT 语言转换为 Graphviz 图，如下所示。
 
 ![Graphviz graph of EXPLAIN SHOW TAGS](https://docs-cdn.nebula-graph.com.cn/docs-2.0/3.ngql-guide/16.query-tuning-statements/explain-show-tags.png)
+
+## `tck`格式
+
+`tck`格式类似于表格，但是没有边框和行之间的间的分割线。用户可以将结果用在单元测试的测试用例中。
+关于`tck`格式的测试用例，参见 [TCK case](https://github.com/vesoft-inc/nebula/tree/master/tests/tck/features)。
+
+- `EXPLAIN`
+
+    ```ngql
+    nebula> EXPLAIN format="tck" FETCH PROP ON player "player_1","player_2","player_3" YIELD properties(vertex).name as name, properties(vertex).age as age;
+    Execution succeeded (time spent 261µs/613.718µs)
+
+    Execution Plan (optimize time 28 us)
+
+
+    | id | name        | dependencies | profiling data | operator info |
+    |  2 | Project     | 1            |                |               |
+    |  1 | GetVertices | 0            |                |               |
+    |  0 | Start       |              |                |               |
+
+
+    Wed, 22 Mar 2023 23:15:52 CST
+
+    ```
+
+- `PROFILE`
+
+    ```ngql
+    nebula> PROFILE format="tck" FETCH PROP ON player "player_1","player_2","player_3" YIELD properties(vertex).name as name, properties(vertex).age as age;
+
+    | name         | age |
+    | "Piter Park" | 24  |
+    | "aaa"        | 24  |
+    | "ccc"        | 24  |
+
+    Got 3 rows (time spent 1.474ms/2.19677ms)
+
+    Execution Plan (optimize time 41 us)
+
+
+    | id | name        | dependencies | profiling data                                                                                                      | operator info |
+    |  2 | Project     | 1            | {"rows":3,"version":0}                                                                                              |               |
+    |  1 | GetVertices | 0            | {"resp[0]":{"exec":"232(us)","host":"127.0.0.1:9779","total":"758(us)"},"rows":3,"total_rpc":"875(us)","version":0} |               |
+    |  0 | Start       |              | {"rows":0,"version":0}                                                                                              |               |
+
+
+    Wed, 22 Mar 2023 23:16:13 CST
+
+    ```