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21 lines
926 B
SQL
21 lines
926 B
SQL
CREATE TABLE comments (
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id BIGINT PRIMARY KEY,
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post_id BIGINT NOT NULL REFERENCES posts(id),
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author_id BIGINT NOT NULL,
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content TEXT NOT NULL,
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like_count INT DEFAULT 0,
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created_at TIMESTAMPTZ NOT NULL DEFAULT NOW(),
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deleted_at TIMESTAMPTZ
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);
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-- 基础索引
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CREATE INDEX idx_comments_post ON comments(post_id, created_at) WHERE deleted_at IS NULL;
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CREATE INDEX idx_comments_author ON comments(author_id, created_at DESC) WHERE deleted_at IS NULL;
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-- 三元组索引用于评论内容搜索
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CREATE INDEX idx_comments_content_trgm ON comments USING gin(content gin_trgm_ops)
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WHERE deleted_at IS NULL;
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-- 热门评论索引
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CREATE INDEX idx_comments_post_likes ON comments(post_id, like_count DESC, created_at)
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WHERE deleted_at IS NULL; |