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new eae00f5dd54 `SHOW SHARDING TABLE RULE` syntax doc (#16824)
eae00f5dd54 is described below
commit eae00f5dd54f098da3ea7b64672647abc7d0e725
Author: lanchengx <[email protected]>
AuthorDate: Fri Apr 15 15:04:56 2022 +0800
`SHOW SHARDING TABLE RULE` syntax doc (#16824)
* DistSQL Documentation.
* DistSQL Documentation.
* DistSQL Documentation.
* DistSQL Documentation.
* DistSQL Documentation.
* Update show-sharding-table-rule.cn.md
* Update show-sharding-table-rule.en.md
---
.../syntax/rql/resource-query/show-resource.cn.md | 2 +-
.../syntax/rql/resource-query/show-resource.en.md | 2 +-
.../rql/rule-query/show-sharding-table-rule.cn.md | 84 ++++++++++++++++++++++
.../rql/rule-query/show-sharding-table-rule.en.md | 84 ++++++++++++++++++++++
4 files changed, 170 insertions(+), 2 deletions(-)
diff --git
a/docs/document/content/reference/distsql/syntax/rql/resource-query/show-resource.cn.md
b/docs/document/content/reference/distsql/syntax/rql/resource-query/show-resource.cn.md
index def4a0412d0..3f27ab780a7 100644
---
a/docs/document/content/reference/distsql/syntax/rql/resource-query/show-resource.cn.md
+++
b/docs/document/content/reference/distsql/syntax/rql/resource-query/show-resource.cn.md
@@ -36,7 +36,7 @@ schemaName ::=
### 示例
- 查询指定逻辑库的资源
```sql
-SHOW SCHEMA RESOURCES FROM example_db;
+SHOW SCHEMA RESOURCES FROM sharding_db;
```
```sql
+------+-------+-----------+------+------+---------------------------------+---------------------------+---------------------------+---------------+---------------+-----------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
[...]
diff --git
a/docs/document/content/reference/distsql/syntax/rql/resource-query/show-resource.en.md
b/docs/document/content/reference/distsql/syntax/rql/resource-query/show-resource.en.md
index 3a77a17f8c0..65b54500dc6 100644
---
a/docs/document/content/reference/distsql/syntax/rql/resource-query/show-resource.en.md
+++
b/docs/document/content/reference/distsql/syntax/rql/resource-query/show-resource.en.md
@@ -37,7 +37,7 @@ schemaName ::=
- Query resources for the specified schema
```sql
-SHOW SCHEMA RESOURCES FROM example_db;
+SHOW SCHEMA RESOURCES FROM sharding_db;
```
```sql
+------+-------+-----------+------+------+---------------------------------+---------------------------+---------------------------+---------------+---------------+-----------+----------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------------
[...]
diff --git
a/docs/document/content/reference/distsql/syntax/rql/rule-query/show-sharding-table-rule.cn.md
b/docs/document/content/reference/distsql/syntax/rql/rule-query/show-sharding-table-rule.cn.md
new file mode 100644
index 00000000000..a84be61e5a7
--- /dev/null
+++
b/docs/document/content/reference/distsql/syntax/rql/rule-query/show-sharding-table-rule.cn.md
@@ -0,0 +1,84 @@
++++
+title = "SHOW SHARDING TABLE RULE"
+weight = 3
++++
+
+
+### 描述
+
+`SHOW SHARDING TABLE RULE` 语法用于查询指定逻辑库中的分片规则。
+
+### 语法
+```
+ShowShardingTableRule ::=
+ 'SHOW' 'SHARDING' 'TABLE' ('RULE' tableName | 'RULES') ('FROM' schemaName)?
+
+tableName ::=
+ identifier
+
+schemaName ::=
+ identifier
+```
+
+### 补充说明
+- 未指定 `schemaName` 时，默认是当前使用的 `SCHEMA`。 如果也未使用 `SCHEMA` 则会提示 `No database
selected`。
+
+ ### 返回值说明
+
+| 列 | 说明 |
+| --------------------------------- | ---------------------------------- |
+| table | 逻辑表名 |
+| actual_data_nodes | 实际的数据节点 |
+| actual_data_sources | 实际的数据源（通过 RDL 创建的规则时显示）|
+| database_strategy_type | 数据库分片策略类型 |
+| database_sharding_column | 数据库分片键 |
+| database_sharding_algorithm_type | 数据库分片算法类型 |
+| database_sharding_algorithm_props | 数据库分片算法参数 |
+| table_strategy_type | 表分片策略类型 |
+| table_sharding_column | 表分片键 |
+| table_sharding_algorithm_type | 表分片算法类型 |
+| table_sharding_algorithm_props | 表分片算法参数 |
+| key_generate_column | 分布式主键生成列 |
+| key_generator_type | 分布式主键生成器类型 |
+| key_generator_props | 分布式主键生成器参数 |
+
+ ### 示例
+- 查询指定逻辑库的分片规则
+```sql
+SHOW SHARDING TABLE RULES FROM sharding_db;
+```
+```sql
++--------------+-------------------+---------------------+------------------------+--------------------------+----------------------------------+-----------------------------------+---------------------+-----------------------+-------------------------------+--------------------------------+---------------------+--------------------+---------------------+
+| table | actual_data_nodes | actual_data_sources |
database_strategy_type | database_sharding_column |
database_sharding_algorithm_type | database_sharding_algorithm_props |
table_strategy_type | table_sharding_column | table_sharding_algorithm_type |
table_sharding_algorithm_props | key_generate_column | key_generator_type |
key_generator_props |
++--------------+-------------------+---------------------+------------------------+--------------------------+----------------------------------+-----------------------------------+---------------------+-----------------------+-------------------------------+--------------------------------+---------------------+--------------------+---------------------+
+| t_order | | ds_0,ds_1 |
| | |
| mod | order_id | mod
| sharding-count=4 | |
| |
+| t_order_item | | ds_0,ds_1 |
| | |
| mod | order_id | mod
| sharding-count=4 | |
| |
++--------------+-------------------+---------------------+------------------------+--------------------------+----------------------------------+-----------------------------------+---------------------+-----------------------+-------------------------------+--------------------------------+---------------------+--------------------+---------------------+
+2 rows in set (0.12 sec)
+```
+
+- 查询当前逻辑库的分片规则
+```sql
+SHOW SHARDING TABLE RULES;
+```
+```sql
++--------------+-------------------+---------------------+------------------------+--------------------------+----------------------------------+-----------------------------------+---------------------+-----------------------+-------------------------------+--------------------------------+---------------------+--------------------+---------------------+
+| table | actual_data_nodes | actual_data_sources |
database_strategy_type | database_sharding_column |
database_sharding_algorithm_type | database_sharding_algorithm_props |
table_strategy_type | table_sharding_column | table_sharding_algorithm_type |
table_sharding_algorithm_props | key_generate_column | key_generator_type |
key_generator_props |
++--------------+-------------------+---------------------+------------------------+--------------------------+----------------------------------+-----------------------------------+---------------------+-----------------------+-------------------------------+--------------------------------+---------------------+--------------------+---------------------+
+| t_order | | ds_0,ds_1 |
| | |
| mod | order_id | mod
| sharding-count=4 | |
| |
+| t_order_item | | ds_0,ds_1 |
| | |
| mod | order_id | mod
| sharding-count=4 | |
| |
++--------------+-------------------+---------------------+------------------------+--------------------------+----------------------------------+-----------------------------------+---------------------+-----------------------+-------------------------------+--------------------------------+---------------------+--------------------+---------------------+
+2 rows in set (0.12 sec)
+```
+- 查询指定逻辑表的分片规则
+```sql
+SHOW SHARDING TABLE RULE t_order;
+```
+```sql
++--------------+-------------------+---------------------+------------------------+--------------------------+----------------------------------+-----------------------------------+---------------------+-----------------------+-------------------------------+--------------------------------+---------------------+--------------------+---------------------+
+| table | actual_data_nodes | actual_data_sources |
database_strategy_type | database_sharding_column |
database_sharding_algorithm_type | database_sharding_algorithm_props |
table_strategy_type | table_sharding_column | table_sharding_algorithm_type |
table_sharding_algorithm_props | key_generate_column | key_generator_type |
key_generator_props |
++--------------+-------------------+---------------------+------------------------+--------------------------+----------------------------------+-----------------------------------+---------------------+-----------------------+-------------------------------+--------------------------------+---------------------+--------------------+---------------------+
+| t_order | | ds_0,ds_1 |
| | |
| mod | order_id | mod
| sharding-count=4 | |
| |
++--------------+-------------------+---------------------+------------------------+--------------------------+----------------------------------+-----------------------------------+---------------------+-----------------------+-------------------------------+--------------------------------+---------------------+--------------------+---------------------+
+1 rows in set (0.12 sec)
+```
diff --git
a/docs/document/content/reference/distsql/syntax/rql/rule-query/show-sharding-table-rule.en.md
b/docs/document/content/reference/distsql/syntax/rql/rule-query/show-sharding-table-rule.en.md
new file mode 100644
index 00000000000..34480117500
--- /dev/null
+++
b/docs/document/content/reference/distsql/syntax/rql/rule-query/show-sharding-table-rule.en.md
@@ -0,0 +1,84 @@
++++
+title = "SHOW SHARDING TABLE RULE"
+weight = 3
++++
+
+
+### Description
+
+The `SHOW SHARDING TABLE RULE` syntax is used to query the sharding table rule
in the specified schema.
+
+### Syntax
+```
+ShowShardingTableRule ::=
+ 'SHOW' 'SHARDING' 'TABLE' ('RULE' tableName | 'RULES') ('FROM' schemaName)?
+
+tableName ::=
+ identifier
+
+schemaName ::=
+ identifier
+```
+
+### Supplement
+- When `schemaName` is not specified, the default is the currently used
`SCHEMA`. If `SCHEMA` is not used, `No database selected` will be prompted.
+
+ ### Return value description
+
+| Column | Description
|
+| --------------------------------- |
--------------------------------------------------------- |
+| table | Logical table name
|
+| actual_data_nodes | Actual data node
|
+| actual_data_sources | Actual data source (Displayed when
creating rules by RDL) |
+| database_strategy_type | Database sharding strategy type
|
+| database_sharding_column | Database sharding column
|
+| database_sharding_algorithm_type | Database sharding algorithm type
|
+| database_sharding_algorithm_props | Database sharding algorithm properties
|
+| table_strategy_type | Table sharding strategy type
|
+| table_sharding_column | Table sharding column
|
+| table_sharding_algorithm_type | Table sharding algorithm type
|
+| table_sharding_algorithm_props | Table sharding algorithm properties
|
+| key_generate_column | Sharding key generator column
|
+| key_generator_type | Sharding key generator type
|
+| key_generator_props | Sharding key generator properties
|
+
+ ### Example
+- Query the sharding table rules of the specified logical schema
+```sql
+SHOW SHARDING TABLE RULES FROM sharding_db;
+```
+```sql
++--------------+-------------------+---------------------+------------------------+--------------------------+----------------------------------+-----------------------------------+---------------------+-----------------------+-------------------------------+--------------------------------+---------------------+--------------------+---------------------+
+| table | actual_data_nodes | actual_data_sources |
database_strategy_type | database_sharding_column |
database_sharding_algorithm_type | database_sharding_algorithm_props |
table_strategy_type | table_sharding_column | table_sharding_algorithm_type |
table_sharding_algorithm_props | key_generate_column | key_generator_type |
key_generator_props |
++--------------+-------------------+---------------------+------------------------+--------------------------+----------------------------------+-----------------------------------+---------------------+-----------------------+-------------------------------+--------------------------------+---------------------+--------------------+---------------------+
+| t_order | | ds_0,ds_1 |
| | |
| mod | order_id | mod
| sharding-count=4 | |
| |
+| t_order_item | | ds_0,ds_1 |
| | |
| mod | order_id | mod
| sharding-count=4 | |
| |
++--------------+-------------------+---------------------+------------------------+--------------------------+----------------------------------+-----------------------------------+---------------------+-----------------------+-------------------------------+--------------------------------+---------------------+--------------------+---------------------+
+2 rows in set (0.12 sec)
+```
+
+- Query the sharding table rules of the current logic schema
+```sql
+SHOW SHARDING TABLE RULES;
+```
+```sql
++--------------+-------------------+---------------------+------------------------+--------------------------+----------------------------------+-----------------------------------+---------------------+-----------------------+-------------------------------+--------------------------------+---------------------+--------------------+---------------------+
+| table | actual_data_nodes | actual_data_sources |
database_strategy_type | database_sharding_column |
database_sharding_algorithm_type | database_sharding_algorithm_props |
table_strategy_type | table_sharding_column | table_sharding_algorithm_type |
table_sharding_algorithm_props | key_generate_column | key_generator_type |
key_generator_props |
++--------------+-------------------+---------------------+------------------------+--------------------------+----------------------------------+-----------------------------------+---------------------+-----------------------+-------------------------------+--------------------------------+---------------------+--------------------+---------------------+
+| t_order | | ds_0,ds_1 |
| | |
| mod | order_id | mod
| sharding-count=4 | |
| |
+| t_order_item | | ds_0,ds_1 |
| | |
| mod | order_id | mod
| sharding-count=4 | |
| |
++--------------+-------------------+---------------------+------------------------+--------------------------+----------------------------------+-----------------------------------+---------------------+-----------------------+-------------------------------+--------------------------------+---------------------+--------------------+---------------------+
+2 rows in set (0.12 sec)
+```
+- Query the specified sharding table rule
+```sql
+SHOW SHARDING TABLE RULE t_order;
+```
+```sql
++--------------+-------------------+---------------------+------------------------+--------------------------+----------------------------------+-----------------------------------+---------------------+-----------------------+-------------------------------+--------------------------------+---------------------+--------------------+---------------------+
+| table | actual_data_nodes | actual_data_sources |
database_strategy_type | database_sharding_column |
database_sharding_algorithm_type | database_sharding_algorithm_props |
table_strategy_type | table_sharding_column | table_sharding_algorithm_type |
table_sharding_algorithm_props | key_generate_column | key_generator_type |
key_generator_props |
++--------------+-------------------+---------------------+------------------------+--------------------------+----------------------------------+-----------------------------------+---------------------+-----------------------+-------------------------------+--------------------------------+---------------------+--------------------+---------------------+
+| t_order | | ds_0,ds_1 |
| | |
| mod | order_id | mod
| sharding-count=4 | |
| |
++--------------+-------------------+---------------------+------------------------+--------------------------+----------------------------------+-----------------------------------+---------------------+-----------------------+-------------------------------+--------------------------------+---------------------+--------------------+---------------------+
+1 rows in set (0.12 sec)
+```
