perf(point): batch point creation queries

src/handler/point.rs

@@ -1,5 +1,6 @@
 use axum::{Json, extract::{Path, Query, State}, http::HeaderMap, response::IntoResponse};
 use serde::{Deserialize, Serialize};
+use std::collections::{HashMap, HashSet};
 use uuid::Uuid;
 use validator::Validate;
 use sqlx::{Row, QueryBuilder};
@@ -287,72 +288,65 @@ pub async fn batch_create_points(
         return Err(ApiErr::BadRequest("node_ids cannot be empty".to_string(), None));
     }
 
-    let mut success_count = 0;
-    let mut failed_count = 0;
-    let mut failed_node_ids = Vec::new();
-    let mut created_point_ids = Vec::new();
-
     // Use one transaction for the full batch.
     let mut tx = pool.begin().await?;
+    let node_ids = payload.node_ids;
 
-    for node_id in payload.node_ids {
-        // Ensure node exists.
-        let node_exists = sqlx::query(
-            r#"SELECT 1 FROM node WHERE id = $1"#,
-        )
-        .bind(node_id)
-        .fetch_optional(&mut *tx)
-        .await?
-        .is_some();
+    let nodes: Vec<Node> = sqlx::query_as::<_, Node>(
+        r#"SELECT * FROM node WHERE id = ANY($1)"#,
+    )
+    .bind(&node_ids)
+    .fetch_all(&mut *tx)
+    .await?;
 
-        if !node_exists {
-            failed_count += 1;
-            failed_node_ids.push(node_id);
+    let node_map: HashMap<Uuid, Node> = nodes
+        .into_iter()
+        .map(|node| (node.id, node))
+        .collect();
+
+    let existing_node_ids: HashSet<Uuid> = node_map.keys().copied().collect();
+    let mut failed_node_ids = Vec::new();
+    for node_id in &node_ids {
+        if !existing_node_ids.contains(node_id) {
+            failed_node_ids.push(*node_id);
+        }
+    }
+
+    let existing_point_node_ids: HashSet<Uuid> = sqlx::query_scalar::<_, Uuid>(
+        r#"SELECT node_id FROM point WHERE node_id = ANY($1)"#,
+    )
+    .bind(&node_ids)
+    .fetch_all(&mut *tx)
+    .await?
+    .into_iter()
+    .collect();
+
+    let mut to_create = Vec::new();
+    let mut seen_creatable = HashSet::new();
+    for node_id in node_ids {
+        if !existing_node_ids.contains(&node_id) || existing_point_node_ids.contains(&node_id) {
             continue;
         }
 
-        // Skip nodes that already have a point.
-        let point_exists = sqlx::query(
-            r#"SELECT 1 FROM point WHERE node_id = $1"#,
-        )
-        .bind(node_id)
-        .fetch_optional(&mut *tx)
-        .await?
-        .is_some();
-
-        if point_exists {
+        if !seen_creatable.insert(node_id) {
             continue;
         }
 
-        // Use node browse_name as default point name.
-        let node_info = sqlx::query_as::<_, Node>(
-            r#"SELECT * FROM node WHERE id = $1"#,
-        )
-        .bind(node_id)
-        .fetch_optional(&mut *tx)
-        .await?;
+        let name = node_map
+            .get(&node_id)
+            .map(|node| node.browse_name.clone())
+            .unwrap_or_else(|| format!("Point_{}", node_id));
+        to_create.push((Uuid::new_v4(), node_id, name));
+    }
 
-        let name = match node_info {
-            Some(node) => node.browse_name.clone(),
-            None => format!("Point_{}", node_id),
-        };
-
-        let new_id = Uuid::new_v4();
-
-        sqlx::query(
-            r#"
-            INSERT INTO point (id, node_id, name)
-            VALUES ($1, $2, $3)
-            "#
-        )
-        .bind(new_id)
-        .bind(node_id)
-        .bind(&name)
-        .execute(&mut *tx)
-        .await?;
-
-        success_count += 1;
-        created_point_ids.push(new_id);
+    let mut created_point_ids = Vec::with_capacity(to_create.len());
+    if !to_create.is_empty() {
+        let mut qb = QueryBuilder::new("INSERT INTO point (id, node_id, name) ");
+        qb.push_values(to_create.iter(), |mut b, (id, node_id, name)| {
+            b.push_bind(*id).push_bind(*node_id).push_bind(name);
+        });
+        qb.build().execute(&mut *tx).await?;
+        created_point_ids.extend(to_create.into_iter().map(|(id, _, _)| id));
     }
 
     // Commit the transaction.
@@ -373,8 +367,8 @@ pub async fn batch_create_points(
     }
 
     Ok(Json(BatchCreatePointsRes {
-        success_count,
-        failed_count,
+        success_count: created_point_ids.len(),
+        failed_count: failed_node_ids.len(),
         failed_node_ids,
         created_point_ids,
     }))