feat(migration): 添加 flow_run_logs 复合索引并修复 flow_id 类型

优化 flow_run_logs 查询性能，添加常用排序和过滤的复合索引
将 flow_id 从 VARCHAR(64) 改为 BIGINT 以匹配实体模型
在分页查询中实现末页优化策略

backend/migration/src/lib.rs

@@ -25,6 +25,10 @@ mod m20220101_000017_create_flow_run_logs;
 mod m20220101_000018_add_flow_code_to_flow_run_logs;
 // 新增：计划任务表
 mod m20220101_000019_create_schedule_jobs;
+// 新增：为 flow_run_logs 创建复合索引
+mod m20220101_000020_add_indexes_to_flow_run_logs;
+// 修复 flow_run_logs.flow_id 类型为 BIGINT
+mod m20220101_000021_alter_flow_run_logs_flow_id_to_bigint;
 
 pub struct Migrator;
 
@@ -57,8 +61,12 @@ impl MigratorTrait for Migrator {
             Box::new(m20220101_000017_create_flow_run_logs::Migration),
             // 新增：为 flow_run_logs 添加 flow_code 列
             Box::new(m20220101_000018_add_flow_code_to_flow_run_logs::Migration),
-            // 新增：计划任务表
+            // 新增：计划任务表（恢复注册）
             Box::new(m20220101_000019_create_schedule_jobs::Migration),
+            // 修复 flow_run_logs.flow_id 类型为 BIGINT
+            Box::new(m20220101_000021_alter_flow_run_logs_flow_id_to_bigint::Migration),
+            // 新增：为 flow_run_logs 创建复合索引
+            Box::new(m20220101_000020_add_indexes_to_flow_run_logs::Migration),
         ]
     }
 }

backend/migration/src/m20220101_000020_add_indexes_to_flow_run_logs.rs

@@ -0,0 +1,93 @@
+use sea_orm_migration::prelude::*;
+
+#[derive(DeriveMigrationName)]
+pub struct Migration;
+
+#[async_trait::async_trait]
+impl MigrationTrait for Migration {
+    async fn up(&self, manager: &SchemaManager) -> Result<(), DbErr> {
+        // 覆盖常用排序与过滤的索引
+        // 1) 无过滤：ORDER BY started_at DESC, id DESC 使用 (started_at, id)
+        manager
+            .create_index(
+                Index::create()
+                    .if_not_exists()
+                    .name("idx_flow_run_logs_started_at_id")
+                    .table(FlowRunLogs::Table)
+                    .col(FlowRunLogs::StartedAt)
+                    .col(FlowRunLogs::Id)
+                    .to_owned(),
+            )
+            .await?;
+
+        // 2) flow_id = ? 且 ORDER BY started_at DESC, id DESC 使用 (flow_id, started_at, id)
+        manager
+            .create_index(
+                Index::create()
+                    .if_not_exists()
+                    .name("idx_flow_run_logs_flow_id_started_at_id")
+                    .table(FlowRunLogs::Table)
+                    .col(FlowRunLogs::FlowId)
+                    .col(FlowRunLogs::StartedAt)
+                    .col(FlowRunLogs::Id)
+                    .to_owned(),
+            )
+            .await?;
+
+        // 3) flow_code = ? 且 ORDER BY started_at DESC, id DESC 使用 (flow_code, started_at, id)
+        manager
+            .create_index(
+                Index::create()
+                    .if_not_exists()
+                    .name("idx_flow_run_logs_flow_code_started_at_id")
+                    .table(FlowRunLogs::Table)
+                    .col(FlowRunLogs::FlowCode)
+                    .col(FlowRunLogs::StartedAt)
+                    .col(FlowRunLogs::Id)
+                    .to_owned(),
+            )
+            .await?;
+
+        // 4) ok = ? 且 ORDER BY started_at DESC, id DESC 使用 (ok, started_at, id)
+        manager
+            .create_index(
+                Index::create()
+                    .if_not_exists()
+                    .name("idx_flow_run_logs_ok_started_at_id")
+                    .table(FlowRunLogs::Table)
+                    .col(FlowRunLogs::Ok)
+                    .col(FlowRunLogs::StartedAt)
+                    .col(FlowRunLogs::Id)
+                    .to_owned(),
+            )
+            .await?;
+
+        Ok(())
+    }
+
+    async fn down(&self, manager: &SchemaManager) -> Result<(), DbErr> {
+        manager
+            .drop_index(Index::drop().name("idx_flow_run_logs_started_at_id").table(FlowRunLogs::Table).to_owned())
+            .await?;
+        manager
+            .drop_index(Index::drop().name("idx_flow_run_logs_flow_id_started_at_id").table(FlowRunLogs::Table).to_owned())
+            .await?;
+        manager
+            .drop_index(Index::drop().name("idx_flow_run_logs_flow_code_started_at_id").table(FlowRunLogs::Table).to_owned())
+            .await?;
+        manager
+            .drop_index(Index::drop().name("idx_flow_run_logs_ok_started_at_id").table(FlowRunLogs::Table).to_owned())
+            .await
+    }
+}
+
+#[derive(DeriveIden)]
+enum FlowRunLogs {
+    #[sea_orm(iden = "flow_run_logs")]
+    Table,
+    Id,
+    FlowId,
+    FlowCode,
+    StartedAt,
+    Ok,
+}

backend/migration/src/m20220101_000021_alter_flow_run_logs_flow_id_to_bigint.rs

@@ -0,0 +1,40 @@
+use sea_orm_migration::prelude::*;
+
+#[derive(DeriveMigrationName)]
+pub struct Migration;
+
+#[async_trait::async_trait]
+impl MigrationTrait for Migration {
+    async fn up(&self, manager: &SchemaManager) -> Result<(), DbErr> {
+        // 将 flow_id 从 VARCHAR(64) 改为 BIGINT，以匹配实体模型与查询参数类型
+        manager
+            .alter_table(
+                Table::alter()
+                    .table(FlowRunLogs::Table)
+                    .modify_column(ColumnDef::new(FlowRunLogs::FlowId).big_integer().not_null())
+                    .to_owned(),
+            )
+            .await?
+            ;
+        Ok(())
+    }
+
+    async fn down(&self, manager: &SchemaManager) -> Result<(), DbErr> {
+        // 回滚：将 flow_id 改回 VARCHAR(64)
+        manager
+            .alter_table(
+                Table::alter()
+                    .table(FlowRunLogs::Table)
+                    .modify_column(ColumnDef::new(FlowRunLogs::FlowId).string_len(64).not_null())
+                    .to_owned(),
+            )
+            .await
+    }
+}
+
+#[derive(DeriveIden)]
+enum FlowRunLogs {
+    #[sea_orm(iden = "flow_run_logs")]
+    Table,
+    FlowId,
+}