* possibility of deadlock while doing get_database_name(). First, * copy all the shared values we'll need in this path. * 为了安全起见,我们在发送信号、警告等时释放XidGenLock。 * 这并不是因为我们关心在这种情况下并发性, * 而是因为在执行get_database_name()时要避免出现死锁 */ //获取相...
recomputeNamespacePath在namespace.c中有20多次调用,下面分析执行流程: SQL执行中打开任意表文件执行RelnameGetRelid时,会第一次执行recomputeNamespacePath,后面还会执行多次recomputeNamespacePath但不会重新计算了。 第一次执行总结: 【1】第一次进函数时,baseSearchPathValid是false,需要重新计算baseSearchPath(List...
postgres=# select*from pg_database;oid|datname|datdba|encoding|datcollate|datctype|datistemplate|datallowconn|datconnlimit|datlastsysoid|datfrozenxid|datminmxid|dattablespace|datacl---+---+---+---+---+---+---+---+---+---+---+---+---+---...
This will log you into the PostgreSQL prompt, and from here you are free to interact with the database management system right away. Exit out of the PostgreSQL prompt by typing: \q This will bring you back to thepostgresLinux command prompt. ...
docker run --name XXXXX -e POSTGRES_PASSWORD=123456 -p 5432:5432 -d postgres:13.1 进入容器 docker exec -it XXXXXX /bin/bash 进入数据库 psql -U postgres(用户名)===sudo su postgres 创建database create database learningtest; create database == createdb createdb 是一个 SQL 命令 CREATE DATA...
-- database_name,数据库名称 -- database_user,用户名 -- original_database_name,原始数据库名称 CREATE DATABASE {database_name} WITH TEMPLATE {original_database_name} OWNER {database_user}; 1. 2. 3. 4. 5. 6. 7. 8. 9. 10. ...
Get tables This operation gets tables from a database. Insert row This operation inserts a new row into a table. Update row This operation updates an existing row in a table.Delete rowOperation ID: DeleteItem This operation deletes a row from a table. Parameters 展開資料表 NameKeyRequired...
postgreSQL简介 postgreSQL数据库介绍 数据库端口5432 数据库连接成功常用数据库查询命令 命令行客户端操作pg数据库常用操作 1.链接数据库 $psql -U user_name -d database_name -h serverhost 2.命令常用操作 \h #查看所有的
PostgreSQL External Database Plugin Version Functional Change 11.0 V1.0.0 / 11.0 V1.0.2 (1) Supported automatic reading of the database mode to prevent errors caused by manual input. (2) Automatically checked whether the project versions corresponding to the old and new databases are consistent ...
("-D", dest="Database", type="string", default="none", help="Database name: Not required for Oracle") parser.add_option ("--auth", dest="Account_authentication", type ="choice", choices=['DATABASE_AUTH','OPERATING_SYSTEM_AUTH'], default='DATABASE_AUTH', help=...