pg_parameter_status
Looks up a current parameter setting of the server
&reftitle.description;
stringpg_parameter_status
PgSql\Connectionconnection
stringparam_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.
On a pre-7.4
PostgreSQL server, changing client_encoding via SET after connection startup will
not be reflected by pg_parameter_status.
&reftitle.parameters;
connection
&pgsql.parameter.connection-with-unspecified-default;
param_name
Possible param_name values include server_version,
server_encoding, client_encoding,
is_superuser, session_authorization,
DateStyle, TimeZone, and
integer_datetimes. Note that this value is case-sensitive.
&reftitle.returnvalues;
A string containing the value of the parameter, &false; on failure or invalid
param_name.
&reftitle.changelog;
&Version;
&Description;
&pgsql.changelog.connection-object;
&reftitle.examples;
pg_parameter_status example
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&example.outputs;