如果用户具有依赖对象,如何删除用户的postgres
Database idd owner is role idd_owner. 数据库idd所有者是角色idd_owner。 Database has 2 data schemas: public and firma1. User may have directly or indirectly assi...
使用 HammerDB 对 Citus 和 Postgres 进行 Benchmark,每分钟200万新订单处理测试(官方博客)
在为 Postgres 运行性能基准测试时,主要建议是:“自动化!”如果您正在测量数据库性能,您可能不得不一遍又一遍地运行相同的基准测试。 要么是因为你想要一个稍微不同的配置,要么是因为你意识到你使用了一些错误的设置,或者可能是其他一些原因。通过自动化运行性能基准测试的方式,当发生这种情况时您不会太...
Postgres选择从昨天起存储为纪元的记录
I need to select all records from yesterday. Date in table is stored as epoch timestamp. I tried something like this, but it's not working. 我需要从昨天选择所有...
从postgres调用外部DLL中的.NET函数
It's possible to call C functions through CREATE FUNCTION but how can .NET functions in dll's be called from postgres? 可以通过CREATE FUNCTION调用C函数,但是如何从p...
有办法检查使用pg_dump的postgres备份(或恢复的数据库)的完整性吗?
Hi i have a pretty big database running on Postgres 9.3. I backup it up using pg_dump with compression. I am worried that these backups may be corrupt...
使用命令行恢复postgres备份文件?
I'm new to postgresql, and locally, I use pgadmin3. On the remote server, however, I have no such luxury. 我是postgresql的新手,在本地使用pgadmin3。然而,在远程服务器上,我没有...
带有Rails的Postgres窗口函数列。
I'd like to use the rank() function PostgreSQL on one of my columns. 我想在我的一列上使用rank()函数PostgreSQL。 Character.select("*, rank() OVER (ORDER BY points D...
使用UPDATE FOR和外键锁定postgres
My Postgres tables: 我的Postgres表: performers id rank group_id REFERENCES groups group_id REFERENCES组 performances id pay performer_id REFERENCES p...
Postgres on Rails FATAL:数据库不存在
I've reinstalled Postgres (9.2.4) and I'm having trouble getting it set back up with Rails 3.2.11. I did: 我重新安装了Postgres(9.2.4),但是我无法使用Rails 3.2.11进行备...
Postgres中的左外连接没有返回空值
A download is comprised of download-times, download-time id, and buno ID. Faults are comprised of fault-codes, download-time id, status, and type. A d...
postgres:id自动增量,每天有数百万行。这不好吗?
in my database i save million of rows per day in a table and i delete all the rows after 2 weeks because i don't need them anymore. 在我的数据库中,我每天在表中节省数百...
如何为MySQL和Postgres编写不区分大小写的查询?
I'm running a MySQL database locally for development, but deploying to Heroku which uses Postgres. Heroku handles almost everything, but my case-insen...
Ubuntu:如何安装flex来制作postgres?
I'm trying to work on postgresql locally with ubuntu 10.04. I get this error after I configure with 我正在尝试使用ubuntu 10.04在本地处理postgresql。我在配置之后会得到这个错误 ....
Heroku Rails - 关闭Active Record Postgres连接
I have a rails 4 app I am hosting on heroku. They give some specific advice about how to manage your DB connection pool when using a multi-threaded se...
rails,无法在视图中显示postgres数组计数结果
Rails 4.2.1 Ruby 2.0.0 Rails 4.2.1 Ruby 2.0.0 I want to display the results of a postgres array count query as a simple table in a rails view. The tab...
如何在rails中创建postgres触发器?
I have a table product(id,name) and table product_raiting(product_id,rate_type,rate). When I create new product, I need to create three raitings for t...
将postgres数据库从一台服务器复制到另一台服务器
I have a postgres database with a number of schemas and a number of tables within each of the schemas, and the tables have a bunch of foreign key rela...
如何在postgres plv8程序中记录字符串?
I am trying to print a sql query using plv8.elog() in a plv8 procedure. 我试图在plv8过程中使用plv8.elog()打印SQL查询。 plv8.elog(NOTICE, 'Notice:', str); I don't k...
如何在postgres c用户定义函数中使用float8
I am newer to postgres server programing and I want to achieve double+1; here is the code copy from https://www.postgresql.org/docs/9.6/static/xfunc-c...
如何在Postgres中使用DBI执行“远程表中的\ copy”命令?
I need to copy from a remote postgres server to a local one. I cannot use any ETL tools; it must be done using Perl with DBI. This data will be large ...