javascript – 清除所有内容的PostgreSQL数据库

我想删除数据库中的所有内容而不删除和重新创建数据库.

我发现删除所有模式,重新创建’public’并删除所有临时表是一个好的开始.与“处女”数据库或丢失的东西相比,我是否摆脱了所有内容？

const systemSchemas = ['pg_toast', 'pg_temp_1', 'pg_toast_temp_1', 'pg_catalog', '@R_538_4045@ion_schema']

return Database.connect(connectionString, db => {

  // DROP schemas except systemSchemas
  const schemas = await db.queryRows(`SELECT nspname AS name FROM pg_catalog.pg_namespace ORDER BY nspname`).map(row => row.name).filter(name => {
    return systemSchemas.includes(name) === false
  })
  await Promise.resolve(schemas).each(name => db.query(`DROP SCHEMA "${name}" CASCADE`))

  // DROP temporary tables
  const sql = `SELECT c.relname AS name FROM pg_catalog.pg_class c LEFT JOIN pg_catalog.pg_namespace n ON n.oid = c.relnamespace WHERE n.nspname like 'pg_temp_%' AND pg_catalog.pg_table_is_visible(c.oid) AND c.relpersistence = 't'`
  return db.queryRows(sql).each(row => db.query(`DROP TABLE IF EXISTS "${row.name}"`))

  // CREATE public schema
  return db.query(`CREATE SCHEMA public`)
  .then(() => db.query(`GRANT ALL ON SCHEMA public TO postgres`))
  .then(() => db.query(`GRANT ALL ON SCHEMA public TO public`))
})

解决方法:

您不能仅排除pg_temp_1和pg_toast_temp_1,因为可能有更多临时模式.
似乎删除所有非系统模式(包括临时模式)就足够了,因此您应该只排除pg_catalog,@R_538_4045@ion_schema和pg_toast,而不是尝试删除临时表.

请注意,您可以在单个DO Postgres命令中执行此操作：

do $$
declare
    schema_name text;
begin
    for schema_name in
        select nspname
        from pg_catalog.pg_namespace 
        where nspname not in ('pg_catalog', '@R_538_4045@ion_schema', 'pg_toast')
    loop
        execute format('drop schema %s cascade', schema_name);
    end loop;
    create schema public;
    grant all on schema public to postgres;
    grant all on schema public to public;
    comment on schema public is 'standard public schema';
end;
$$;