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21 lines
1.1 KiB
SQL
21 lines
1.1 KiB
SQL
-- 显式执行一次；只创建阅读目标相关表，不修改已有业务表。
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CREATE TABLE IF NOT EXISTS reading_goals (
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id VARCHAR(64) CHARACTER SET utf8mb4 COLLATE utf8mb4_bin NOT NULL,
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name VARCHAR(60) NOT NULL,
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start_date DATE NOT NULL,
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end_date DATE NOT NULL,
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sources JSON NOT NULL COMMENT '加入目标时的书单名称，不追踪书单后续变更',
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created_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP,
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updated_at TIMESTAMP NOT NULL DEFAULT CURRENT_TIMESTAMP ON UPDATE CURRENT_TIMESTAMP,
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PRIMARY KEY (id)
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) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci COMMENT='阅读目标';
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CREATE TABLE IF NOT EXISTS reading_goal_books (
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goal_id VARCHAR(64) CHARACTER SET utf8mb4 COLLATE utf8mb4_bin NOT NULL,
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book_id VARCHAR(64) CHARACTER SET utf8mb4 COLLATE utf8mb4_bin NOT NULL,
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PRIMARY KEY (goal_id, book_id),
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CONSTRAINT fk_reading_goal_books_goal FOREIGN KEY (goal_id)
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REFERENCES reading_goals (id) ON DELETE CASCADE
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) ENGINE=InnoDB DEFAULT CHARSET=utf8mb4 COLLATE=utf8mb4_unicode_ci
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COMMENT='目标书籍成员；不关联书架表，避免移出书架时丢失目标成员';
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