-- 添加临床试验表的迁移脚本
-- 执行此脚本将在现有数据库中添加 clinical_trials 表

USE medical_info_system;

-- 临床试验表
CREATE TABLE IF NOT EXISTS clinical_trials (
    id BIGINT PRIMARY KEY AUTO_INCREMENT,
    inquiry_id BIGINT COMMENT '关联的查询请求ID',
    nct_id VARCHAR(50) NOT NULL COMMENT 'ClinicalTrials.gov唯一标识',
    study_title TEXT COMMENT '研究标题',
    brief_title VARCHAR(500) COMMENT '简短标题',
    official_title TEXT COMMENT '官方标题',
    overall_status VARCHAR(50) COMMENT '研究状态',
    start_date VARCHAR(50) COMMENT '开始日期',
    completion_date VARCHAR(50) COMMENT '完成日期',
    study_type VARCHAR(50) COMMENT '研究类型',
    phase VARCHAR(50) COMMENT '研究阶段',
    enrollment INT COMMENT '入组人数',
    conditions TEXT COMMENT '适应症（JSON数组）',
    interventions TEXT COMMENT '干预措施（JSON数组）',
    sponsor VARCHAR(500) COMMENT '主要研究者/机构',
    collaborators TEXT COMMENT '合作者（JSON数组）',
    locations TEXT COMMENT '研究地点（JSON数组）',
    brief_summary TEXT COMMENT '简要摘要',
    detailed_description LONGTEXT COMMENT '详细描述',
    primary_outcome TEXT COMMENT '主要终点',
    secondary_outcome TEXT COMMENT '次要终点',
    eligibility_criteria TEXT COMMENT '入选标准',
    url VARCHAR(500) COMMENT 'ClinicalTrials.gov链接',
    raw_data LONGTEXT COMMENT '原始API返回数据（JSON格式）',
    created_at DATETIME NOT NULL,
    updated_at DATETIME,
    INDEX idx_inquiry_id (inquiry_id),
    INDEX idx_nct_id (nct_id),
    INDEX idx_overall_status (overall_status),
    INDEX idx_phase (phase),
    INDEX idx_created_at (created_at),
    UNIQUE KEY uk_inquiry_nct (inquiry_id, nct_id),
    FOREIGN KEY (inquiry_id) REFERENCES inquiry_requests(id) ON DELETE CASCADE
) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci;

-- 验证表是否创建成功
SELECT 
    TABLE_NAME, 
    TABLE_ROWS, 
    CREATE_TIME 
FROM 
    information_schema.TABLES 
WHERE 
    TABLE_SCHEMA = 'medical_info_system' 
    AND TABLE_NAME = 'clinical_trials';

-- 显示表结构
DESCRIBE clinical_trials;