所以最简单的情况是,创建一个逻辑复制以及相关的设置,你最好是superuser的权利。 2 逻辑复制是否可以级联 是的逻辑复制是可以通过一级套一级的方式来进行数据的传送,假如我们有三个POSTGRESQL ,那么我们A 为发布,B 为订阅, B 同时为发布 C 为订阅,这样的设计是可以的。 3 逻辑复制到底要解决什么问题 1 发送增...
所以最简单的情况是,创建一个逻辑复制以及相关的设置,你最好是superuser的权利。 2 逻辑复制是否可以级联 是的逻辑复制是可以通过一级套一级的方式来进行数据的传送,假如我们有三个POSTGRESQL ,那么我们A 为发布,B 为订阅, B 同时为发布 C 为订阅,这样的设计是可以的。 3 逻辑复制到底要解决什么问题 1 发送增...
PostgreSQL provides the facility to create different types of user roles like user and superuser. The superuser is a system account with high-level privileges beyond other users. Superuser has direct access to any data or user. There is no need to take permission to access data. A superuser...
PostgreSQL 8.4 or higher 问题 How can I check all the current SQL queries being executed by the PostgreSQL? 决议 To show all current queries: Raw SELECT datname,procpid,current_query FROM pg_stat_activity; SELECT datname,usename,procpid,client_addr,waiting,query_start,current_...
You can use COUNT to check: SELECT COUNT(*) FROM address WHERE address_id = 100; But if you are looking for a faster query with a yes/no answer: SELECT EXISTS(SELECT 1 FROM address WHERE address_id = 100); Need a good GUI tool for PostgreSQL? Check out TablePlus. It’s native...
FOR USER username IN SCHEMA schema_name GRANT SELECT, INSERT, UPDATE, DELETE ON TABLES TO username; Need a good GUI tool for PostgreSQL? Check out TablePlus. It’s native, beautiful, and available for free. Download TablePlus for Mac. ...
3.Usually,PostgreSQLstarts automatically on boot up. You can confirm this using the command given below: $ sudo systemctl status postgresql Check PostgreSQL Status 4.To log in to yourPostgreSQLinstance, first switch to thepostgresuser. The Postgres user comes included by default with the installati...
In PostgreSQL, the “\d” command, the “\d+” command, “information_schema”, and the “SELECT *” statements with the “FALSE” option are used to check the table’s structure. The “\d” and “\d+” are meta-commands and must be executed from the “SQL Shell” aka psql. Whil...
The people using PostgreSQL and the Streaming Replication feature seem to ask many of the same questions: 1. How best to monitor Streaming Replication? 2. What is the best way to do that? 3. Are there alternatives, when monitoring on Standby, to using the pg_stat_replication view on Maste...
Learn how to find slow queries in PostgreSQL using logs and metrics. Tutorial on how to check for and fix performance issues to speed up your database.