我想强制一个表的自动增量字段的一些值，我尝试了这样:
ALTER TABLE product AUTO_INCREMENT = 1453
AND
ALTER SEQUENCE product RESTART WITH 1453;
ERROR: relation "your_sequence_name" does not exist
我有一个表产品与Id和名称字段
当前回答
下面的命令会自动执行此操作:这也会删除表中的所有数据。所以要小心。
TRUNCATE TABLE someTable RESTART IDENTITY;
其他回答
要重置自动递增，您必须通过使用以下查询获得您的序列名。
语法:
SELECT pg_get_serial_sequence(‘tablename’, ‘ columnname‘);
例子:
SELECT pg_get_serial_sequence('demo', 'autoid');
查询将返回autoid的序列名为"Demo_autoid_seq" 然后使用以下查询重置自动id
语法:
ALTER SEQUENCE sequenceName RESTART WITH value;
例子:
ALTER SEQUENCE "Demo_autoid_seq" RESTART WITH 1453;
要将其设置为下一个最大值，您可以使用:
SELECT SETVAL(pg_get_serial_sequence('table_name', 'column_name'), (SELECT MAX(column_name) FROM table_name));
下面是你要找的命令，假设你的product表序列是product_id_seq:
ALTER SEQUENCE product_id_seq RESTART WITH 1453;
节点脚本:修复所有表identity: auto-increment / nextval，基于上次插入它。
const pg = require('pg');
const { Client } = pg;
const updateTables = async () => {
const client = new Client({
user: 'postgres',
host: 'localhost',
database: 'my-database',
password: 'postgres',
port: 5432,
});
await client.connect();
console.log('Connected');
const execQuery = async (queryStr, params = []) => {
return new Promise((resolve, reject) => {
client.query(queryStr, params, (error, results) => {
if (error) {
reject(error);
} else {
resolve(results);
}
})
})
}
const tablesRes = await execQuery(`
SELECT table_name
FROM information_schema.tables
WHERE table_type='BASE TABLE'
AND table_schema='public';
`)
const tables = tablesRes.rows.map(row => row.table_name);
tables.map(async tableName => {
let lastId;
try {
const res = await execQuery(`SELECT id from "${tableName}" ORDER BY id DESC LIMIT 1`);
lastId = res.rows[0].id;
} catch (e) {}
if (lastId) {
const nextId = lastId + 1;
const queryStr = `ALTER SEQUENCE ${tableName}_id_seq RESTART WITH ${nextId}`;
await execQuery(queryStr);
console.log(tableName, queryStr);
}
})
};
updateTables();
-- Change the starting value of the sequence
ALTER SEQUENCE project_id_seq RESTART 3000;
相同但充满活力:
SELECT SETVAL('project_id_seq', (SELECT MAX(id) FROM project));
SELECT的使用很奇怪，但它有效。
来源: https://kylewbanks.com/blog/Adding-or-Modifying-a-PostgreSQL-Sequence-Auto-Increment
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