Merge pull request #17116 from taosdata/docs/3.0_query_doc

docs: improve the system table chapter

docs/en/12-taos-sql/22-meta.md

@@ -11,7 +11,15 @@ TDengine includes a built-in database named `INFORMATION_SCHEMA` to provide acce
 4. Future versions of TDengine can add new columns to INFORMATION_SCHEMA tables without affecting existing business systems.
 5. It is easier for users coming from other database management systems. For example, Oracle users can query data dictionary tables.
 
-Note: SHOW statements are still supported for the convenience of existing users.
+:::info
+
+- SHOW statements are still supported for the convenience of existing users.
+- Some columns in the system table may be keywords, and you need to use the escape character '\`' when querying, for example, to query the VGROUPS in the database `test`:
+```sql 
+   select `vgroups` from ins_databases where name = 'test';
+``` 
+
+:::
 
 This document introduces the tables of INFORMATION_SCHEMA and their structure.
 
@@ -102,7 +110,11 @@ Provides information about user-created databases. Similar to SHOW DATABASES.
 | 24  | wal_retention_period | INT              | WAL retention period                                   |
 | 25  |  wal_retention_size  | INT              | Maximum WAL size                                   |
 | 26  |   wal_roll_period    | INT              | WAL rotation period                                 |
-| 27  |   wal_segment_size   | WAL file size |
+| 27  |   wal_segment_size   | BIGINT | WAL file size |
+| 28  |   stt_trigger   | SMALLINT | The threshold for number of files to trigger file merging |
+| 29  |   table_prefix   | SMALLINT | The prefix length in the table name that is ignored when distributing table to vnode based on table name |
+| 30  |   table_suffix   | SMALLINT | The suffix length in the table name that is ignored when distributing table to vnode based on table name |
+| 31  |   tsdb_pagesize   | INT | The page size for internal storage engine, its unit is KB |
 
 ## INS_FUNCTIONS
 

docs/zh/12-taos-sql/22-meta.md

@@ -12,7 +12,15 @@ TDengine 内置了一个名为 `INFORMATION_SCHEMA` 的数据库，提供对数
 4. TDengine 在后续演进中可以灵活的添加已有 INFORMATION_SCHEMA 中表的列，而不用担心对既有业务系统造成影响
 5. 与其他数据库系统更具互操作性。例如，Oracle 数据库用户熟悉查询 Oracle 数据字典中的表
 
-Note: 由于 SHOW 语句已经被开发者熟悉和广泛使用，所以它们仍然被保留。
+:::info
+
+- 由于 SHOW 语句已经被开发者熟悉和广泛使用，所以它们仍然被保留。
+- 系统表中的一些列可能是关键字，在查询时需要使用转义符'\`'，例如查询数据库 test 有几个 VGROUP：
+```sql 
+   select `vgroups` from ins_databases where name = 'test';
+``` 
+
+:::
 
 本章将详细介绍 `INFORMATION_SCHEMA` 这个内置元数据库中的表和表结构。
 
@@ -103,7 +111,11 @@ Note: 由于 SHOW 语句已经被开发者熟悉和广泛使用，所以它们
 | 24  | wal_retention_period | INT              | WAL 的保存时长                                   |
 | 25  |  wal_retention_size  | INT              | WAL 的保存上限                                   |
 | 26  |   wal_roll_period    | INT              | wal 文件切换时长                                 |
-| 27  |   wal_segment_size   | wal 单个文件大小 |
+| 27  |   wal_segment_size   | BIGINT | wal 单个文件大小 |
+| 28  |   stt_trigger   | SMALLINT | 触发文件合并的落盘文件的个数 |
+| 29  |   table_prefix   | SMALLINT | 内部存储引擎根据表名分配存储该表数据的 VNODE 时要忽略的前缀的长度 |
+| 30  |   table_suffix   | SMALLINT | 内部存储引擎根据表名分配存储该表数据的 VNODE 时要忽略的后缀的长度 |
+| 31  |   tsdb_pagesize   | INT | 时序数据存储引擎中的页大小 |
 
 ## INS_FUNCTIONS