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-- 003_add_ai_labels.sql
-- 为 episodes 表添加 AI 打标字段(看板升级 L2→L3 桥梁)
-- 前置:执行前先 pg_dump 备份
-- 全部 nullable,不影响现有数据
ALTER TABLE episodes
ADD COLUMN IF NOT EXISTS program_format VARCHAR(20),
ADD COLUMN IF NOT EXISTS equipment_domain JSONB,
ADD COLUMN IF NOT EXISTS scene_tags JSONB,
ADD COLUMN IF NOT EXISTS tech_tags JSONB,
ADD COLUMN IF NOT EXISTS narrative_structure VARCHAR(20),
ADD COLUMN IF NOT EXISTS opening_hook VARCHAR(10),
ADD COLUMN IF NOT EXISTS ai_label_confidence VARCHAR(10);
-- 分析引擎常用分组查询索引
CREATE INDEX IF NOT EXISTS idx_episodes_program_format ON episodes (program_format);
CREATE INDEX IF NOT EXISTS idx_episodes_narrative_structure ON episodes (narrative_structure);
CREATE INDEX IF NOT EXISTS idx_episodes_ai_label_confidence ON episodes (ai_label_confidence);
COMMENT ON COLUMN episodes.program_format IS '主题材(单选): 装备深解/横切类比/历史纵深/前沿科技/事件战例/人物牵引';
COMMENT ON COLUMN episodes.equipment_domain IS '装备域(多选JSONB数组): 陆战装备/海军舰船/航空航天/导弹与反导/信息化/后勤保障/轻武器/跨域/其他';
COMMENT ON COLUMN episodes.scene_tags IS '场景标签(多选JSONB数组): 节点策划/热点跟进/装备首发/展会';
COMMENT ON COLUMN episodes.tech_tags IS '技术线标签(多选JSONB数组): 无人作战/智能化/有人无人协同';
COMMENT ON COLUMN episodes.narrative_structure IS '叙事结构(单选): 主线演进/并列结构';
COMMENT ON COLUMN episodes.opening_hook IS '开篇钩子(单选): 强/中/弱';
COMMENT ON COLUMN episodes.ai_label_confidence IS '打标状态: draft(AI草稿)/reviewed(制片人确认)/inferred(标题推断)';