From 27cb883b23f563436d38010e743336e102cff272 Mon Sep 17 00:00:00 2001
From: En <huangmingen@lesingle.com>
Date: Fri, 20 Mar 2026 14:37:47 +0800
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V10__update_course_package_stats.sql:
- 根据 lesson 表实际数据更新 usage_count (status != 'cancelled')
- 根据 lesson 表实际数据更新 teacher_count (status = 'completed' 去重教师)
---
 .../V10__update_course_package_stats.sql      | 37 +++++++++++++++++++
 1 file changed, 37 insertions(+)
 create mode 100644 reading-platform-java/src/main/resources/db/migration/V10__update_course_package_stats.sql

diff --git a/reading-platform-java/src/main/resources/db/migration/V10__update_course_package_stats.sql b/reading-platform-java/src/main/resources/db/migration/V10__update_course_package_stats.sql
new file mode 100644
index 0000000..54f0f3e
--- /dev/null
+++ b/reading-platform-java/src/main/resources/db/migration/V10__update_course_package_stats.sql
@@ -0,0 +1,37 @@
+-- -----------------------------------------------------
+-- V10: 更新课程包统计数据
+-- 说明：根据 lesson 表实际数据更新 course_package 的 usage_count 和 teacher_count
+-- 时间：2026-03-20
+-- -----------------------------------------------------
+
+-- 1. 更新 usage_count：统计 status != 'cancelled' 的课程数
+UPDATE course_package cp
+SET usage_count = (
+    SELECT COUNT(*)
+    FROM lesson l
+    WHERE l.course_id = cp.id
+    AND l.status != 'cancelled'
+    AND l.deleted = 0
+)
+WHERE cp.deleted = 0;
+
+-- 2. 更新 teacher_count：统计 status = 'completed' 的课程中去重教师数
+UPDATE course_package cp
+SET teacher_count = (
+    SELECT COUNT(DISTINCT l.teacher_id)
+    FROM lesson l
+    WHERE l.course_id = cp.id
+    AND l.status = 'completed'
+    AND l.teacher_id IS NOT NULL
+    AND l.deleted = 0
+)
+WHERE cp.deleted = 0;
+
+-- 3. 处理 NULL 值，确保字段为 0 而不是 NULL
+UPDATE course_package cp
+SET usage_count = 0
+WHERE usage_count IS NULL AND deleted = 0;
+
+UPDATE course_package cp
+SET teacher_count = 0
+WHERE teacher_count IS NULL AND deleted = 0;