docs: SHOW FLOW & FLOWS table info

docs/nightly/en/reference/sql/information-schema/flows.md

@@ -0,0 +1,35 @@
+# FLOWS
+The `Flows` table provides the flow task information.
+
+```sql
+public=> DESC TABLE INFORMATION_SCHEMA.FLOWS;
+```
+
+```sql
+      Column      |  Type  | Key | Null | Default | Semantic Type 
+------------------+--------+-----+------+---------+---------------
+ flow_name        | String |     | NO   |         | FIELD
+ flow_id          | UInt32 |     | NO   |         | FIELD
+ table_catalog    | String |     | NO   |         | FIELD
+ flow_definition  | String |     | NO   |         | FIELD
+ comment          | String |     | YES  |         | FIELD
+ expire_after     | Int64  |     | YES  |         | FIELD
+ source_table_ids | String |     | YES  |         | FIELD
+ sink_table_name  | String |     | NO   |         | FIELD
+ flownode_ids     | String |     | YES  |         | FIELD
+ options          | String |     | YES  |         | FIELD
+(10 rows)
+```
+
+The columns in table:
+
+* `flow_name`: the flow task's name.
+* `flow_id`: the flow task's id.
+* `table_catalog`: the catalog this flow belongs to, named as `table_catalog` to keep consistent with the `INFORMATION_SCHEMA` standard.
+* `flow_definition`: the flow task's definition. It's the SQL statement used to create the flow task.
+* `comment`: the comment of the flow task.
+* `expire_after`: the expire time of the flow task.
+* `source_table_ids`: the source table ids of the flow task.
+* `sink_table_name`: the sink table name of the flow task.
+* `flownode_ids`: the flownode ids used by the flow task.
+* `options`: extra options of the flow task.

docs/nightly/en/reference/sql/information-schema/overview.md

@@ -54,6 +54,7 @@ There is still lots of work to do for `INFORMATION_SCHEMA`. The tracking [issue]
 | [`REGION_PEERS`](./region-peers.md) | Provides details about where regions are stored. |
 | [`RUNTIME_METRICS`](./runtime-metrics.md)| Provides the system runtime metrics.|
 | [`CLUSTER_INFO`](./cluster-info.md)| Provides the topology information of the cluster.|
+| [`FLOWS`](./flows.md) | Provides the flow information.|
 
 
 

docs/nightly/en/reference/sql/show.md

@@ -176,3 +176,48 @@ WITH(
 
 * `Table`: the table name.
 * `Create Table`: The SQL to create the table.
+
+## SHOW CREATE FLOW
+
+Shows the `CREATE FLOW` statement that creates the flow task.
+
+For example:
+
+```sql
+public=> SHOW CREATE FLOW filter_numbers;
+```
+
+```sql
+      Flow      |                      Create Flow                      
+----------------+-------------------------------------------------------
+ filter_numbers | CREATE OR REPLACE FLOW IF NOT EXISTS filter_numbers  +
+                | SINK TO out_num_cnt                                  +
+                | AS SELECT number FROM numbers_input WHERE number > 10
+(1 row)
+```
+
+## SHOW FLOWS
+
+Show all flows:
+
+```sql
+public=> SHOW FLOWS;
+```
+
+```sql
+     Flows      
+----------------
+ filter_numbers
+(1 row)
+```
+also support `LIKE` expression:
+```sql
+public=> show flows like "filter%";
+```
+
+```sql
+     Flows      
+----------------
+ filter_numbers
+(1 row)
+```

docs/nightly/zh/reference/sql/information-schema/flows.md

@@ -0,0 +1,35 @@
+# FLOWS
+`Flows` 表提供了 Flow 任务的相关信息。
+
+```sql
+public=> DESC TABLE INFORMATION_SCHEMA.FLOWS;
+```
+
+```sql
+      Column      |  Type  | Key | Null | Default | Semantic Type 
+------------------+--------+-----+------+---------+---------------
+ flow_name        | String |     | NO   |         | FIELD
+ flow_id          | UInt32 |     | NO   |         | FIELD
+ table_catalog    | String |     | NO   |         | FIELD
+ flow_definition  | String |     | NO   |         | FIELD
+ comment          | String |     | YES  |         | FIELD
+ expire_after     | Int64  |     | YES  |         | FIELD
+ source_table_ids | String |     | YES  |         | FIELD
+ sink_table_name  | String |     | NO   |         | FIELD
+ flownode_ids     | String |     | YES  |         | FIELD
+ options          | String |     | YES  |         | FIELD
+(10 rows)
+```
+
+表中的列：
+
+* `flow_name`: Flow 任务的名称。
+* `flow_id`: Flow 任务的 id。
+* `table_catalog`: the catalog this flow belongs to, named as `table_catalog` to keep consistent with the `INFORMATION_SCHEMA` standard. 该 Flow 所属的目录，命名为 `table_catalog` 以保持与 `INFORMATION_SCHEMA` 标准的一致性。
+* `flow_definition`: Flow 任务的定义。这是用于创建 Flow 任务的 SQL 语句。
+* `comment`: Flow 任务的注释。
+* `expire_after`: Flow 任务的过期时间。
+* `source_table_ids`: Flow 任务的源表 id。
+* `sink_table_name`: Flow 任务的目标表名称。
+* `flownode_ids`: Flow 任务使用的 flownode id。
+* `options`: Flow 任务的其他额外选项。

docs/nightly/zh/reference/sql/information-schema/overview.md

@@ -52,5 +52,5 @@
 | [`REGION_PEERS`](./region-peers.md) | 提供了表的 Region 存储的详细信息。 |
 | [`RUNTIME_METRICS`](./runtime-metrics.md)| 提供了系统运行时指标。|
 | [`CLUSTER_INFO`](./cluster-info.md)| 提供了集群的节点拓扑信息。|
-
+| [`FLOWS`](./flows.md) | 提供 Flow 相关信息。|
 

docs/nightly/zh/reference/sql/show.md

@@ -176,3 +176,48 @@ WITH(
 
 * `Table`: 表的名称
 * `Create Table`: 用于创建该表的 SQL
+
+## SHOW CREATE FLOW
+
+展示创建指定 Flow 任务的 `CREATE FLOW` 语句。
+
+比如：
+
+```sql
+public=> SHOW CREATE FLOW filter_numbers;
+```
+
+```sql
+      Flow      |                      Create Flow                      
+----------------+-------------------------------------------------------
+ filter_numbers | CREATE OR REPLACE FLOW IF NOT EXISTS filter_numbers  +
+                | SINK TO out_num_cnt                                  +
+                | AS SELECT number FROM numbers_input WHERE number > 10
+(1 row)
+```
+
+## SHOW FLOWS
+
+展示当前所有 Flow 任务：
+
+```sql
+public=> SHOW FLOWS;
+```
+
+```sql
+     Flows      
+----------------
+ filter_numbers
+(1 row)
+```
+also support `LIKE` expression:
+```sql
+public=> show flows like "filter%";
+```
+
+```sql
+     Flows      
+----------------
+ filter_numbers
+(1 row)
+```