ebnf set role (#17045) (#17191)

sql-statements/sql-statement-set-role.md

@@ -9,24 +9,15 @@ The `SET ROLE` statement is used to enable roles in the current session. After e
 
 ## Synopsis
 
-**SetRoleStmt:**
-
-![SetRoleStmt](/media/sqlgram/SetRoleStmt.png)
-
-**SetRoleOpt:**
-
-![SetRoleOpt](/media/sqlgram/SetRoleOpt.png)
-
-**SetDefaultRoleOpt:**
-
-![SetDefaultRoleOpt](/media/sqlgram/SetDefaultRoleOpt.png)
+```ebnf+diagram
+SetRoleStmt ::=
+    "SET" "ROLE" ( "DEFAULT" | "ALL" ( "EXCEPT" Rolename ("," Rolename)* )? | "NONE" | Rolename ("," Rolename)* )?
+```
 
 ## Examples
 
 Create a user `'u1'@'%'` and three roles: `'r1'@'%'`, `'r2'@'%'` and `'r3'@'%'`. Grant these roles to `'u1'@'%'` and set `'r1'@'%'` as the default role of `'u1'@'%'`.
 
-{{< copyable "sql" >}}
-
 ```sql
 CREATE USER 'u1'@'%';
 CREATE ROLE 'r1', 'r2', 'r3';
@@ -36,8 +27,6 @@ SET DEFAULT ROLE 'r1' TO 'u1'@'%';
 
 Log in as `'u1'@'%'` and execute the following `SET ROLE` statement to enable all roles.
 
-{{< copyable "sql" >}}
-
 ```sql
 SET ROLE ALL;
 SELECT CURRENT_ROLE();
@@ -54,8 +43,6 @@ SELECT CURRENT_ROLE();
 
 Execute the following `SET ROLE` statement to enable `'r2'` and `'r3'`.
 
-{{< copyable "sql" >}}
-
 ```sql
 SET ROLE 'r2', 'r3';
 SELECT CURRENT_ROLE();
@@ -72,8 +59,6 @@ SELECT CURRENT_ROLE();
 
 Execute the following `SET ROLE` statement to enable the default role(s).
 
-{{< copyable "sql" >}}
-
 ```sql
 SET ROLE DEFAULT;
 SELECT CURRENT_ROLE();
@@ -90,8 +75,6 @@ SELECT CURRENT_ROLE();
 
 Execute the following `SET ROLE` statement to cancel all enabled role(s).
 
-{{< copyable "sql" >}}
-
 ```sql
 SET ROLE NONE;
 SELECT CURRENT_ROLE();