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14 lines
610 B
SQL
14 lines
610 B
SQL
CREATE TABLE post_likes (
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post_id BIGINT NOT NULL,
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user_id BIGINT NOT NULL,
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created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
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-- 复合主键，防止重复点赞
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PRIMARY KEY (post_id, user_id)
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);
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-- [核心索引] 优化 "feed流中判断我是否已赞" (user_id = ? AND post_id IN (...))
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CREATE INDEX idx_post_likes_lookup ON post_likes(user_id, post_id);
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-- [核心索引] 优化 "我赞过的帖子" 列表
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CREATE INDEX idx_post_likes_user_timeline ON post_likes(user_id, created_at DESC); |