Db2 无法在HADR standby中执行子选择或联合操作

尝试使用union运算符或subselect在HADR数据库中使用RoS Read only Standby执行某些查询时，我得到了错误SQL1773N原因代码5

原因是什么？它们是不生成写入的操作

联合

再选择

with hist(start_time, operationtype) as (
 select start_time, operationtype
 from sysibmadm.db_history
 where operation = 'B' )
select 'delta', operationtype, start_time, timestampdiff(8, current timestamp - char(timestamp(start_time)))
from hist
where start_time = (
 select max(start_time)
 from hist
 where operationtype = 'D' or operationtype = 'E')

---

这似乎是sysibmadm.db_历史中特有的问题。 在启用ROS的情况下，在待机状态下尝试了以下union all和subSelect，两者都工作正常

CREATE TABLE TAB101  (
id bigint NOT NULL,
createTimestamp TIMESTAMP NOT NULL,
primary key (id))

insert into tab101 (id, CREATETIMESTAMP) values 
(1, current timestamp - 35 minutes), 
(2, current timestamp - 30 minutes),
(3, current timestamp - 25 minutes), 
(4, current timestamp - 20 minutes),
(5, current timestamp - 15 minutes), 
(6, current timestamp - 10 minutes),
(7, current timestamp - 5 minutes), 
(8, current timestamp)

with tempTab101 (id, CREATETIMESTAMP) as (
  select id, CREATETIMESTAMP from tab101
)
select id, CREATETIMESTAMP from tempTab101 
where id > 1
union all
select id, CREATETIMESTAMP from tempTab101
where id <= 10

with tempTab101 (id, CREATETIMESTAMP) as (
  select id, CREATETIMESTAMP from tab101
)
select * from tempTab101
where id = (
  select id from tempTab101 where id=2
)

---

这可能只是一个猜测，它必须将这些子查询具体化为一个工作文件，该文件仍然被视为在待机状态下的写入。我同意你的观点，但是文档中没有定义这一点。文档说，在待机状态下的数据库上的查询只能使用SMS系统临时表空间。这可能与此相关，最好检查一下。

CREATE TABLE TAB101  (
id bigint NOT NULL,
createTimestamp TIMESTAMP NOT NULL,
primary key (id))

insert into tab101 (id, CREATETIMESTAMP) values 
(1, current timestamp - 35 minutes), 
(2, current timestamp - 30 minutes),
(3, current timestamp - 25 minutes), 
(4, current timestamp - 20 minutes),
(5, current timestamp - 15 minutes), 
(6, current timestamp - 10 minutes),
(7, current timestamp - 5 minutes), 
(8, current timestamp)

with tempTab101 (id, CREATETIMESTAMP) as (
  select id, CREATETIMESTAMP from tab101
)
select id, CREATETIMESTAMP from tempTab101 
where id > 1
union all
select id, CREATETIMESTAMP from tempTab101
where id <= 10

with tempTab101 (id, CREATETIMESTAMP) as (
  select id, CREATETIMESTAMP from tab101
)
select * from tempTab101
where id = (
  select id from tempTab101 where id=2
)