mirror/postgresql
2
0
Fork 0
mirror of https://git.postgresql.org/git/postgresql.git synced 2025-02-11 19:20:40 +08:00
Code Issues Packages Projects Releases Wiki Activity

Improve psql's \dC command to take a pattern parameter. Casts are shown

Browse Source 
if their source or target types match the pattern (using the same definition
of "match" as \dT does).  Per recent discussion.
This commit is contained in:
Tom Lane 2008-11-06 15:18:36 +00:00
parent 5ae29525d1
commit cdc197cf31
3 changed files with 39 additions and 10 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

7
doc/src/sgml/ref/psql-ref.sgml
View File

@ -1,5 +1,5 @@
<!--
$PostgreSQL: pgsql/doc/src/sgml/ref/psql-ref.sgml,v 1.211 2008/09/06 20:18:08 tgl Exp $
$PostgreSQL: pgsql/doc/src/sgml/ref/psql-ref.sgml,v 1.212 2008/11/06 15:18:35 tgl Exp $
PostgreSQL documentation
-->
@ -894,10 +894,13 @@ testdb=&gt;
<varlistentry>
<term><literal>\dC</literal></term>
<term><literal>\dC [ <replaceable class="parameter">pattern</replaceable> ]</literal></term>
<listitem>
<para>
Lists all available type casts.
If <replaceable class="parameter">pattern</replaceable>
is specified, only casts whose source or target types match the
pattern are listed.
</para>
</listitem>
</varlistentry>

38
src/bin/psql/describe.c
View File

@ -8,7 +8,7 @@
*
* Copyright (c) 2000-2008, PostgreSQL Global Development Group
*
* $PostgreSQL: pgsql/src/bin/psql/describe.c,v 1.186 2008/11/03 19:08:56 tgl Exp $
* $PostgreSQL: pgsql/src/bin/psql/describe.c,v 1.187 2008/11/06 15:18:35 tgl Exp $
*/
#include "postgres_fe.h"
@ -2082,10 +2082,10 @@ listCasts(const char *pattern)
initPQExpBuffer(&buf);
/*
* We need left join here for binary casts. Also note that we don't
* attempt to localize '(binary coercible)', because there's too much
* risk of gettext translating a function name that happens to match
* some string in the PO database.
* We need a left join to pg_proc for binary casts; the others are just
* paranoia. Also note that we don't attempt to localize '(binary
* coercible)', because there's too much risk of gettext translating a
* function name that happens to match some string in the PO database.
*/
printfPQExpBuffer(&buf,
"SELECT pg_catalog.format_type(castsource, NULL) AS \"%s\",\n"
@ -2099,13 +2099,39 @@ listCasts(const char *pattern)
" END as \"%s\"\n"
"FROM pg_catalog.pg_cast c LEFT JOIN pg_catalog.pg_proc p\n"
" ON c.castfunc = p.oid\n"
"ORDER BY 1, 2",
" LEFT JOIN pg_catalog.pg_type ts\n"
" ON c.castsource = ts.oid\n"
" LEFT JOIN pg_catalog.pg_namespace ns\n"
" ON ns.oid = ts.typnamespace\n"
" LEFT JOIN pg_catalog.pg_type tt\n"
" ON c.casttarget = tt.oid\n"
" LEFT JOIN pg_catalog.pg_namespace nt\n"
" ON nt.oid = tt.typnamespace\n"
"WHERE (true",
gettext_noop("Source type"),
gettext_noop("Target type"),
gettext_noop("Function"),
gettext_noop("no"), gettext_noop("in assignment"), gettext_noop("yes"),
gettext_noop("Implicit?"));
/*
* Match name pattern against either internal or external name of either
* castsource or casttarget
*/
processSQLNamePattern(pset.db, &buf, pattern, true, false,
"ns.nspname", "ts.typname",
"pg_catalog.format_type(ts.oid, NULL)",
"pg_catalog.pg_type_is_visible(ts.oid)");
appendPQExpBuffer(&buf, ") OR (true");
processSQLNamePattern(pset.db, &buf, pattern, true, false,
"nt.nspname", "tt.typname",
"pg_catalog.format_type(tt.oid, NULL)",
"pg_catalog.pg_type_is_visible(tt.oid)");
appendPQExpBuffer(&buf, ")\nORDER BY 1, 2;");
res = PSQLexec(buf.data, false);
termPQExpBuffer(&buf);
if (!res)

4
src/bin/psql/help.c
View File

@ -3,7 +3,7 @@
*
* Copyright (c) 2000-2008, PostgreSQL Global Development Group
*
* $PostgreSQL: pgsql/src/bin/psql/help.c,v 1.130 2008/08/29 15:52:07 alvherre Exp $
* $PostgreSQL: pgsql/src/bin/psql/help.c,v 1.131 2008/11/06 15:18:36 tgl Exp $
*/
#include "postgres_fe.h"
@ -200,7 +200,7 @@ slashUsage(unsigned short int pager)
fprintf(output, _(" \\da [PATTERN] list aggregate functions\n"));
fprintf(output, _(" \\db [PATTERN] list tablespaces (add \"+\" for more detail)\n"));
fprintf(output, _(" \\dc [PATTERN] list conversions\n"));
fprintf(output, _(" \\dC list casts\n"));
fprintf(output, _(" \\dC [PATTERN] list casts\n"));
fprintf(output, _(" \\dd [PATTERN] show comment for object\n"));
fprintf(output, _(" \\dD [PATTERN] list domains\n"));
fprintf(output, _(" \\df [PATTERN] list functions (add \"+\" for more detail)\n"));