feat: flow type on creating procedure (#5572)

feat: flow type on creating

src/common/meta/src/ddl/create_flow.rs

@@ -15,6 +15,7 @@
 mod metadata;
 
 use std::collections::BTreeMap;
+use std::fmt;
 
 use api::v1::flow::flow_request::Body as PbFlowRequest;
 use api::v1::flow::{CreateRequest, FlowRequest, FlowRequestHeader};
@@ -77,6 +78,7 @@ impl CreateFlowProcedure {
                 query_context,
                 state: CreateFlowState::Prepare,
                 prev_flow_info_value: None,
+                flow_type: None,
             },
         }
     }
@@ -104,7 +106,7 @@ impl CreateFlowProcedure {
         if create_if_not_exists && or_replace {
             // this is forbidden because not clear what does that mean exactly
             return error::UnsupportedSnafu {
-                operation: "Create flow with both `IF NOT EXISTS` and `OR REPLACE`".to_string(),
+                operation: "Create flow with both `IF NOT EXISTS` and `OR REPLACE`",
             }
             .fail();
         }
@@ -175,6 +177,8 @@ impl CreateFlowProcedure {
             self.allocate_flow_id().await?;
         }
         self.data.state = CreateFlowState::CreateFlows;
+        // determine flow type
+        self.data.flow_type = Some(determine_flow_type(&self.data.task));
 
         Ok(Status::executing(true))
     }
@@ -309,6 +313,11 @@ impl Procedure for CreateFlowProcedure {
     }
 }
 
+pub fn determine_flow_type(_flow_task: &CreateFlowTask) -> FlowType {
+    // TODO(discord9): determine flow type
+    FlowType::RecordingRule
+}
+
 /// The state of [CreateFlowProcedure].
 #[derive(Debug, Clone, Serialize, Deserialize, AsRefStr, PartialEq)]
 pub enum CreateFlowState {
@@ -322,6 +331,35 @@ pub enum CreateFlowState {
     CreateMetadata,
 }
 
+/// The type of flow.
+#[derive(Debug, Clone, Copy, Serialize, Deserialize)]
+pub enum FlowType {
+    /// The flow is a recording rule task.
+    RecordingRule,
+    /// The flow is a streaming task.
+    Streaming,
+}
+
+impl FlowType {
+    pub const RECORDING_RULE: &str = "recording_rule";
+    pub const STREAMING: &str = "streaming";
+}
+
+impl Default for FlowType {
+    fn default() -> Self {
+        Self::RecordingRule
+    }
+}
+
+impl fmt::Display for FlowType {
+    fn fmt(&self, f: &mut fmt::Formatter<'_>) -> fmt::Result {
+        match self {
+            FlowType::RecordingRule => write!(f, "{}", FlowType::RECORDING_RULE),
+            FlowType::Streaming => write!(f, "{}", FlowType::STREAMING),
+        }
+    }
+}
+
 /// The serializable data.
 #[derive(Debug, Serialize, Deserialize)]
 pub struct CreateFlowData {
@@ -335,6 +373,7 @@ pub struct CreateFlowData {
     /// For verify if prev value is consistent when need to update flow metadata.
     /// only set when `or_replace` is true.
     pub(crate) prev_flow_info_value: Option<DeserializedValueWithBytes<FlowInfoValue>>,
+    pub(crate) flow_type: Option<FlowType>,
 }
 
 impl From<&CreateFlowData> for CreateRequest {
@@ -342,7 +381,7 @@ impl From<&CreateFlowData> for CreateRequest {
         let flow_id = value.flow_id.unwrap();
         let source_table_ids = &value.source_table_ids;
 
-        CreateRequest {
+        let mut req = CreateRequest {
             flow_id: Some(api::v1::FlowId { id: flow_id }),
             source_table_ids: source_table_ids
                 .iter()
@@ -356,7 +395,11 @@ impl From<&CreateFlowData> for CreateRequest {
             comment: value.task.comment.clone(),
             sql: value.task.sql.clone(),
             flow_options: value.task.flow_options.clone(),
-        }
+        };
+
+        let flow_type = value.flow_type.unwrap_or_default().to_string();
+        req.flow_options.insert("flow_type".to_string(), flow_type);
+        req
     }
 }
 
@@ -369,7 +412,7 @@ impl From<&CreateFlowData> for (FlowInfoValue, Vec<(FlowPartitionId, FlowRouteVa
             expire_after,
             comment,
             sql,
-            flow_options: options,
+            flow_options: mut options,
             ..
         } = value.task.clone();
 
@@ -386,19 +429,21 @@ impl From<&CreateFlowData> for (FlowInfoValue, Vec<(FlowPartitionId, FlowRouteVa
             .map(|(idx, peer)| (idx as u32, FlowRouteValue { peer: peer.clone() }))
             .collect::<Vec<_>>();
 
-        (
-            FlowInfoValue {
-                source_table_ids: value.source_table_ids.clone(),
-                sink_table_name,
-                flownode_ids,
-                catalog_name,
-                flow_name,
-                raw_sql: sql,
-                expire_after,
-                comment,
-                options,
-            },
-            flow_routes,
-        )
+        let flow_type = value.flow_type.unwrap_or_default().to_string();
+        options.insert("flow_type".to_string(), flow_type);
+
+        let flow_info = FlowInfoValue {
+            source_table_ids: value.source_table_ids.clone(),
+            sink_table_name,
+            flownode_ids,
+            catalog_name,
+            flow_name,
+            raw_sql: sql,
+            expire_after,
+            comment,
+            options,
+        };
+
+        (flow_info, flow_routes)
     }
 }