ebnf show table next rowid

sql-statements/sql-statement-show-table-next-rowid.md

@@ -8,34 +8,29 @@ aliases: ['/docs/dev/sql-statements/sql-statement-show-table-next-rowid/']
 
 `SHOW TABLE NEXT_ROW_ID` is used to show the details of some special columns of a table, including:
 
-* `AUTO_INCREMENT` column automatically created by TiDB, namely, `_tidb_rowid` column.
+* [`AUTO_INCREMENT`](/auto-increment.md) column automatically created by TiDB, namely, `_tidb_rowid` column.
 * `AUTO_INCREMENT` column created by users.
 * [`AUTO_RANDOM`](/auto-random.md) column created by users.
 * [`SEQUENCE`](/sql-statements/sql-statement-create-sequence.md) created by users.
 
 ## Synopsis
 
-**ShowTableNextRowIDStmt:**
-
-![ShowTableNextRowIDStmt](/media/sqlgram/ShowTableNextRowIDStmt.png)
-
-**TableName:**
-
-![TableName](/media/sqlgram/TableName.png)
+```ebnf+diagram
+ShowTableNextRowIDStmt ::=
+    "SHOW" "TABLE" (SchemaName ".")? TableName "NEXT_ROW_ID"
+```
 
 ## Examples
 
 For newly created tables, `NEXT_GLOBAL_ROW_ID` is `1` because no Row ID is allocated.
 
-{{< copyable "sql" >}}
-
 ```sql
-create table t(a int);
+CREATE TABLE t(a int);
 Query OK, 0 rows affected (0.06 sec)
 ```
 
 ```sql
-show table t next_row_id;
+SHOW TABLE t NEXT_ROW_ID;
 +---------+------------+-------------+--------------------+
 | DB_NAME | TABLE_NAME | COLUMN_NAME | NEXT_GLOBAL_ROW_ID |
 +---------+------------+-------------+--------------------+
@@ -44,16 +39,16 @@ show table t next_row_id;
 1 row in set (0.00 sec)
 ```
 
-Data have been written to the table. The TiDB server that inserts the data allocates and caches 30000 IDs at once. Thus, NEXT_GLOBAL_ROW_ID is 30001 now.
+Data have been written to the table. The TiDB server that inserts the data allocates and caches 30000 IDs at once. Thus, NEXT_GLOBAL_ROW_ID is 30001 now. The number of IDs is controled by the [`AUTO_ID_CACHE`](/auto-increment.md#auto_id_cache).
 
 ```sql
-insert into t values (), (), ();
+INSERT INTO t VALUES (), (), ();
 Query OK, 3 rows affected (0.02 sec)
 Records: 3  Duplicates: 0  Warnings: 0
 ```
 
 ```sql
-show table t next_row_id;
+SHOW TABLE t NEXT_ROW_ID;
 +---------+------------+-------------+--------------------+
 | DB_NAME | TABLE_NAME | COLUMN_NAME | NEXT_GLOBAL_ROW_ID |
 +---------+------------+-------------+--------------------+