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Emit parameter values during query bind/execute errors

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This makes such log entries more useful, since the cause of the error
can be dependent on the parameter values.

Author: Alexey Bashtanov, Álvaro Herrera
Discussion: https://postgr.es/m/0146a67b-a22a-0519-9082-bc29756b93a2@imap.cc
Reviewed-by: Peter Eisentraut, Andres Freund, Tom Lane
This commit is contained in:
Alvaro Herrera
2019-12-11 18:03:35 -03:00
parent 16114f2ea0
commit ba79cb5dc8
8 changed files with 271 additions and 47 deletions
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23
doc/src/sgml/config.sgml
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@ -6595,6 +6595,29 @@ log_line_prefix = '%m [%p] %q%u@%d/%a '
</listitem>
</varlistentry>
<varlistentry id="guc-log-parameters-on-error" xreflabel="log_parameters_on_error">
<term><varname>log_parameters_on_error</varname> (<type>boolean</type>)
<indexterm>
<primary><varname>log_parameters_on_error</varname> configuration parameter</primary>
</indexterm>
</term>
<listitem>
<para>
Controls whether bind parameters are logged when a statement is logged
as a result of <xref linkend="guc-log-min-error-statement"/>.
It adds some overhead, as postgres will compute and store textual
representations of parameter values in memory for all statements,
even if they eventually do not get logged.
This setting has no effect on statements logged due to
<xref linkend="guc-log-min-duration-statement"/> or
<xref linkend="guc-log-statement"/> settings, as they are always logged
with parameters.
The default is <literal>off</literal>.
Only superusers can change this setting.
</para>
</listitem>
</varlistentry>
<varlistentry id="guc-log-statement" xreflabel="log_statement">
<term><varname>log_statement</varname> (<type>enum</type>)
<indexterm>