pg_parameter_status

(PHP 5)

pg_parameter_status — Looks up a current parameter setting of the server.

Описание

string pg_parameter_status ( resource $connection , string $param_name )
string pg_parameter_status ( string $param_name )

Looks up a current parameter setting of the server.

Certain parameter values are reported by the server automatically at connection startup or whenever their values change. pg_parameter_status() can be used to interrogate these settings. It returns the current value of a parameter if known, or FALSE if the parameter is not known.

Parameters reported as of PostgreSQL 8.0 include server_version, server_encoding, client_encoding, is_superuser, session_authorization, DateStyle, TimeZone, and integer_datetimes. (server_encoding, TimeZone, and integer_datetimes were not reported by releases before 8.0.) Note that server_version, server_encoding and integer_datetimes cannot change after PostgreSQL startup.

PostgreSQL 7.3 or lower servers do not report parameter settings, pg_parameter_status() includes logic to obtain values for server_version and client_encoding anyway. Applications are encouraged to use pg_parameter_status() rather than ad hoc code to determine these values.

Предостережение

On a pre-7.4 PostgreSQL server, changing client_encoding via SET after connection startup will not be reflected by pg_parameter_status().

Список параметров

connection

PostgreSQL database connection resource. When connection is not present, the default connection is used. The default connection is the last connection made by pg_connect() or pg_pconnect().

param_name

Possible param_name values include server_version, server_encoding, client_encoding, is_superuser, session_authorization, DateStyle, TimeZone, and integer_datetimes.

Возвращаемые значения

A string containing the value of the parameter, FALSE on failure or invalid param_name .

Примеры

Пример #1 pg_parameter_status() example

<?php
  $dbconn 
pg_connect("dbname=publisher") or die("Could not connect");

  echo 
"Server encoding: "pg_parameter_status($dbconn"server_encoding");
?>

Результат выполнения данного примера:

Server encoding: SQL_ASCII

Коментарии

Автор:
Although PostgreSQL generally recognizes configuration parameters in a case-insensitive fashion (e.g., "SHOW datestyle" shows the "DateStyle" value), the pg_parameter_status() function is case sensitive.
2016-03-04 02:19:36
http://php5.kiev.ua/manual/ru/function.pg-parameter-status.html
Автор:
pg_parameter_status() returns boolean FALSE for 'client', 'protocol' and 'server'.
Use pg_version() instead to get the software version numbers and the protocol.
2019-04-29 22:31:23
http://php5.kiev.ua/manual/ru/function.pg-parameter-status.html

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