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feat: Flyway 迁移脚本更新课程包统计数据

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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)
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En 2026-03-20 14:37:47 +08:00
parent 4ec61e48ca
commit 27cb883b23
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reading-platform-java/src/main/resources/db/migration/V10__update_course_package_stats.sql Normal file
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-- -----------------------------------------------------
-- 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;