30 lines
849 B
PL/PgSQL
30 lines
849 B
PL/PgSQL
-- 确保启用 uuid-ossp 扩展（用于生成 UUID）
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CREATE EXTENSION IF NOT EXISTS "uuid-ossp";
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-- 创建 users 表
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CREATE TABLE users
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(
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id CHAR(36) PRIMARY KEY DEFAULT uuid_generate_v4()::varchar,
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username VARCHAR(255) NOT NULL UNIQUE,
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password VARCHAR(255) NOT NULL,
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nickname VARCHAR(255),
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created_at TIMESTAMP WITH TIME ZONE DEFAULT NOW(),
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updated_at TIMESTAMP WITH TIME ZONE DEFAULT NOW()
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);
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-- 创建触发器函数：自动更新 updated_at
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CREATE OR REPLACE FUNCTION update_updated_at_column()
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RETURNS TRIGGER AS
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$$
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BEGIN
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NEW.updated_at = NOW();
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RETURN NEW;
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END;
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$$ LANGUAGE plpgsql;
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-- 创建触发器：在 users 表 UPDATE 时自动调用
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CREATE TRIGGER trigger_update_users_updated_at
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BEFORE UPDATE
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ON users
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FOR EACH ROW
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EXECUTE FUNCTION update_updated_at_column(); |