application_name

The application_name can be any string of less than NAMEDATALEN characters (64 characters in a standard build). It is typically set by an application upon connection to the server. The name will be displayed in the pg_stat_activity view and included in CSV log entries. It can also be included in regular log entries via the log_line_prefix parameter. Only printable ASCII characters may be used in the application_name value. Other characters are replaced with C-style hexadecimal escapes.

English manual coverage begins with PostgreSQL 7.4. Source history and runtime observations have their own recorded version boundaries.

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boot val: Unknown
category: Reporting and Logging / What to Log
context: user
doc same as: Unknown
documented: true
enumvals: Unknown
extra desc: Unknown
lang: en
max val: Unknown
metadata version: 18
min val: Unknown
name: application_name
short desc: Sets the application name to be reported in statistics and logs.
source: pg-settings-source-snapshot
unit: Unknown
vartype: string

Definition PG 18

The application_name can be any string of less than NAMEDATALEN characters (64 characters in a standard build). It is typically set by an application upon connection to the server. The name will be displayed in the pg_stat_activity view and included in CSV log entries. It can also be included in regular log entries via the log_line_prefix parameter. Only printable ASCII characters may be used in the application_name value. Other characters are replaced with C-style hexadecimal escapes.

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Complete source facts

doc html

<p>
        The <code class="varname">application_name</code> can be any string of less than
        <code class="symbol">NAMEDATALEN</code> characters (64 characters in a standard build).
        It is typically set by an application upon connection to the server.
        The name will be displayed in the <code class="structname">pg_stat_activity</code> view
        and included in CSV log entries.  It can also be included in regular
        log entries via the <a class="xref" href="/docs/18/runtime-config-logging.html#GUC-LOG-LINE-PREFIX">log_line_prefix</a> parameter.
        Only printable ASCII characters may be used in the
        <code class="varname">application_name</code> value.
        Other characters are replaced with <a class="link" href="/docs/18/sql-syntax-lexical.html#SQL-SYNTAX-STRINGS-ESCAPE" title="4.1.2.2. String Constants with C-Style Escapes">C-style hexadecimal escapes</a>.
       </p>

documentation revision

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Source references

Original manual reference

Full definition and evidence JSON

Definition sources

center · PostgreSQL 18 · wiki-repair-20261023:cd437d982b51236ce385514a6b679bb44a71231eca80f96a7966eb884ce8c804

Text language: en · wiki-repair-20261023:cd437d982b51236ce385514a6b679bb44a71231eca80f96a7966eb884ce8c804