在postgres 12.1.3中执行正确的sql脚本获取错误输出，其中是我的错误

当我在postgres 12.1.3中执行sql脚本时

select  'pg_dump -h localhost -d ' || d.datname || ' -U dba -v -O > d:\'|| d.datname || '_'|| to_char(CURRENT_TIMESTAMP,'YYYYMMDDHH24MISS')||'.sql' as backupscript
,'psql -h localhost -U dba '|| d.datname ||' < d:\'|| d.datname || '_'|| to_char(CURRENT_TIMESTAMP,'YYYYMMDDHH24MISS')||'.sql' as restorescript
, 'create database ' || d.datname || ' with owner ' || aa.username::text ||' ;'  as createdatabase
, ''
from pg_database d , current_user  as aa(username)
where d.datname not in ('postgres','template0','template1','template1')

选择'pg|U dump-h localhost-d'| d.datname |'-U dba-v-O>d:\'| d.datname | |'| to|U char（当前时间戳，'yyyymmddh24miss'）| |'.sql'作为备份脚本
，将“psql-h localhost-U dba”| d.datname | |“

输出是

select  'pg_dump -h localhost -d ' || d.datname || ' -U dba -v -O > d:\'|| d.datname || '_'|| to_char(CURRENT_TIMESTAMP,'YYYYMMDDHH24MISS')||'.sql' as backupscript
,'psql -h localhost -U dba '|| d.datname ||' < d:\'|| d.datname || '_'|| to_char(CURRENT_TIMESTAMP,'YYYYMMDDHH24MISS')||'.sql' as restorescript
, 'create database ' || d.datname || ' with owner ' || aa.username::text ||'
> ERROR:  unterminated quoted string at or near "'"
LINE 3: ...se ' || d.datname || ' with owner ' || aa.username::text ||'
                                                                      ^

> Time: 0.004s

选择'pg|U dump-h localhost-d'| d.datname |'-U dba-v-O>d:\'| d.datname | |'| to|U char（当前时间戳，'yyyymmddh24miss'）| |'.sql'作为备份脚本
，将“psql-h localhost-U dba”| d.datname | |“错误：在“'”处或附近未终止的引号字符串
第3行：…se'| | d.datname | |与所有者'| | aa.username:：text | |'
^
>时间：0.004s

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引用的内容乱七八糟。这部分

'-U dba-v-O>d:\'

您为什么要执行

\'

？我尝试运行您的查询，然后查询成功。无错误：我希望联系人字符串生成备份数据库命令，然后在windows中执行