postgresql 插件 之 pg_variables 插件 pg_variables 插件 地址:https://github.com/postgrespro/pg_variables 介绍: pg_variables是一个当前用户会话级别的插件,相当于当前连接用户的全局变量,可以通过pgv_set设置变量,只要当前用户不退出连接,其他的地方就可以用pgv_get获取到通过pgv_set设置内容的值。在特定的场景...
$ cd pg_variables $ make USE_PGXS=1 $ sudo make USE_PGXS=1 install $ make USE_PGXS=1 installcheck $ psql DB -c "CREATE EXTENSION pg_variables;" Module functions The functions provided by thepg_variablesmodule are shown in the tables below. ...
cat pg_variables--1.0.sql pg_variables--1.0--1.1.sql pg_variables--1.1--1.2.sql>pg_variables--1.2.sql [pg12@localhostpg_variables]$ makeUSE_PGXS=1install/bin/mkdir-p '/appdb/pg12/pg12.0/lib/postgresql'/bin/mkdir-p '/appdb/pg12/pg12.0/share/postgresql/extension'/bin/mkdir-p '/a...
Functions for defining and using variables in client sessions.The pg_variables extension defines pgv_set and pgv_get functions for scalar variables, and several functions for record type. The variables are accessable only inside the session context. Variables are transaction indendent. Support for ...
For any SQL command that does not return rows, for example INSERT without a RETURNING clause, you can execute the command within a PL/pgSQL function just by writing the command. Any PL/pgSQL variable name appearing in the command text is treated as a parameter, and then the current value...
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We use variables to store the values that we wish to change later or reference without needing to declare or initialize them again. Even with PostgreSQL, it’s possible to declare and initialize the variables in PL/pgSQL. Besides, you can reference its value from a table. Declaring variables...
FYI, looking at the release notes, I see 15 GUC variables added in this release, and two removed. That 15 number seemed unusually high so I thought I would report it. -- Bruce Momjian https://momjian.us EDB https://enterprisedb.com Only you can decide what is important to you. Pr...
> variables appear and disappear. For example, if you have > > SELECT a, b FROM table1 > > and then you drop column b, maybe the above query continues to work because > there is also a variable b. Or maybe it now does different things because b ...
Cc: Tom Lane; neilc@samurai.com; pgsql-patches@postgresql.org Subject: Re: [PATCHES] [HACKERS] Implementation of SQLCODE and SQLERRM variables Guys, is this patch ready for application? I think so, but am not 100% sure. --- Pavel Stehule wrote: > Hello, > > I changed code by your...