61 lines
1.7 KiB
SQL
61 lines
1.7 KiB
SQL
-- 创建新表
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DROP TABLE IF EXISTS firearm_new;
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CREATE TABLE firearm_new
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(
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id BIGSERIAL NOT NULL,
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name VARCHAR(64) NOT NULL,
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type INTEGER NOT NULL,
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level VARCHAR(10) NOT NULL,
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calibre VARCHAR(20) NOT NULL,
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fire_rate INTEGER NOT NULL,
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armour_damage INTEGER NOT NULL,
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body_damage INTEGER NOT NULL,
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review TEXT NULL,
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CONSTRAINT firearm_new_pkey PRIMARY KEY (id)
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);
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-- 迁移数据
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INSERT INTO firearm_new(id, name, type, level, calibre, fire_rate, armour_damage, body_damage,
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review)
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SELECT id,
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name,
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type,
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level,
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'',
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0,
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0,
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0,
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review
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FROM firearm;
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-- 处理外键（关键步骤）
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-- 先删除指向旧表的外键约束
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ALTER TABLE modification
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DROP CONSTRAINT fk_modification_firearm;
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-- 重命名旧表和索引
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ALTER TABLE firearm
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RENAME TO firearm_legacy;
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ALTER INDEX firearm_pkey RENAME TO firearm_legacy_pkey;
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-- 重命名新表和索引
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ALTER TABLE firearm_new
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RENAME TO firearm;
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ALTER INDEX firearm_new_pkey RENAME TO firearm_pkey;
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-- 重新建立外键，指向新的 firearm 表
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ALTER TABLE modification
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ADD CONSTRAINT fk_modification_firearm
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FOREIGN KEY (firearm_id) REFERENCES firearm (id);
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-- 序列所有权与名称修正
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ALTER SEQUENCE firearm_id_seq RENAME TO firearm_legacy_id_seq;
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ALTER SEQUENCE firearm_new_id_seq RENAME TO firearm_id_seq;
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ALTER SEQUENCE firearm_id_seq OWNED BY firearm.id;
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-- 更新序列计数器
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SELECT setval('firearm_id_seq', coalesce(max(id), 1))
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FROM firearm;
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-- 删除旧表
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DROP TABLE IF EXISTS firearm_legacy CASCADE; |