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Tweak the default behavior of psql's \dconfig.

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\dconfig without an argument originally printed all parameters,
but it seems more useful to print only those parameters with
non-default settings.  You can easily get the show-everything
behavior with "\dconfig *", but that output is unwieldy and
seems unlikely to be wanted very often.

Per suggestion from Christoph Berg.

Discussion: https://postgr.es/m/YlFQLzlPi4QD0wSi@msg.df7cb.de
This commit is contained in:
Tom Lane 2022-04-11 15:11:46 -04:00
parent 3c702b3ed1
commit 5e70d8b5d1
2 changed files with 17 additions and 9 deletions
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10
doc/src/sgml/ref/psql-ref.sgml
View File

@ -129,7 +129,7 @@ echo '\x \\ SELECT * FROM foo;' | psql
for more details about how the server handles multi-query strings.)
</para>
<para>
If having several commands executed in one transaction is not desired,
If having several commands executed in one transaction is not desired,
use repeated <option>-c</option> commands or feed multiple commands to
<application>psql</application>'s standard input,
either using <application>echo</application> as illustrated above, or
@ -1385,9 +1385,11 @@ testdb=&gt;
<listitem>
<para>
Lists server configuration parameters and their values.
If <replaceable class="parameter">pattern</replaceable>
is specified, only parameters whose names match the pattern are
listed.
If <replaceable class="parameter">pattern</replaceable> is specified,
only parameters whose names match the pattern are listed. Without
a <replaceable class="parameter">pattern</replaceable>, only
parameters that are set to non-default values are listed.
(Use <literal>\dconfig *</literal> to see all parameters.)
If <literal>+</literal> is appended to the command name, each
parameter is listed with its data type, context in which the
parameter can be set, and access privileges (if non-default access

16
src/bin/psql/describe.c
View File

@ -4404,10 +4404,13 @@ describeConfigurationParameters(const char *pattern, bool verbose,
" LEFT JOIN pg_catalog.pg_parameter_acl p\n"
" ON pg_catalog.lower(s.name) = p.parname\n");
processSQLNamePattern(pset.db, &buf, pattern,
false, false,
NULL, "pg_catalog.lower(s.name)", NULL,
NULL);
if (pattern)
processSQLNamePattern(pset.db, &buf, pattern,
false, false,
NULL, "pg_catalog.lower(s.name)", NULL,
NULL);
else
appendPQExpBufferStr(&buf, "WHERE s.source <> 'default'\n");
appendPQExpBufferStr(&buf, "ORDER BY 1;");
@ -4417,7 +4420,10 @@ describeConfigurationParameters(const char *pattern, bool verbose,
return false;
myopt.nullPrint = NULL;
myopt.title = _("List of configuration parameters");
if (pattern)
myopt.title = _("List of configuration parameters");
else
myopt.title = _("List of non-default configuration parameters");
myopt.translate_header = true;
printQuery(res, &myopt, pset.queryFout, false, pset.logfile);