Getting the physical storage size of a database is very helpful in database planning. Use the following command to get the size of a PostgreSQL database in bytes: 1 SELECTpg_database_size(current_database()); The current_database() is a function which return the name of the database w...
-- First, let's get the OID of the 'public' namespace that our table lives in - you need -- to run this in the 'blogdb' database, otherwise you'll get the OID of the 'public' -- namespace for the database you're currently connected to. blogdb=# select to_regnamespace('pub...
blogdb=# select lp, lp_off, lp_len, t_ctid, t_data blogdb-# from heap_page_items(get_raw_page('countries', 0)) blogdb-# offset 8 limit 1; -- This used to be the dead tuple where the old 'Antarctica' version was. lp | lp_off | lp_len | t_ctid | t_data ---+---+...
blogdb=# select lp, lp_off, lp_len, t_ctid, t_data blogdb-# from heap_page_items(get_raw_page('countries', 0)) blogdb-# offset 8 limit 1; -- This used to be the dead tuple where the old 'Antarctica' version was. lp | lp_off | lp_len | t_ctid | t_data ---+---+...
staticFileAllocateVfd(void){Indexi;Filefile;DO_DB(elog(LOG,"AllocateVfd. Size %zu",SizeVfdCache));Assert(SizeVfdCache>0);/* InitFileAccess not called? */if(VfdCache[0].nextFree==0){/** The free list is empty so it is time to increase the size of the* array. We cho...
public T Get<T>(int index) { var parameter = _oracleParameters[index]; if (parameter != null) return (T)Convert.ChangeType(parameter.Value, typeof(T)); return default(T); } } public sealed class DbString { public DbString() { Length = -1; } ...
Overview of Postgres workstreams at Microsoft in the last 8 months, both open source and in the cloud on Azure. This 2024 edition is a newer, completely updated version of a popular blog post from August 2023. ","body":" In this post you’ll get a bird’s eye ...
backrest pgbackrest: command: "/usr/bin/pgbackrest --stanza=<stanza-name> restore --delta --link-all" keep_data: True no_params: True recovery_conf: recovery_target_timeline: latest restore_command: '/usr/bin/pgbackrest --stanza=<stanza-name> archive-get %f %P' method: pgbackrest pg...
9.mydb=> \i basics.sql \i 命令从指定的文件中读取命令。 10.COPY weather FROM '/home/user/weather.txt'; 批量将文本文件中内容导入到wether表 11.SHOW search_path; 显示搜索路径 12.创建用户 CREATE USER 用户名 WITH PASSWORD '密码' 13.创建模式 ...
PostgreSQL gives access to a wide range of data types, including: 1. Numeric data types: This includes integers, floating-point numbers, and decimal numbers. 2. Character data types: This includes strings, text, and character arrays.