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Commitcdc197c

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Improve psql's \dC command to take a pattern parameter. Casts are shown
if their source or target types match the pattern (using the same definitionof "match" as \dT does). Per recent discussion.
1 parent5ae2952 commitcdc197c

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3 files changed

+39
-10
lines changed

3 files changed

+39
-10
lines changed

‎doc/src/sgml/ref/psql-ref.sgml

Lines changed: 5 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -1,5 +1,5 @@
11
<!--
2-
$PostgreSQL: pgsql/doc/src/sgml/ref/psql-ref.sgml,v 1.211 2008/09/0620:18:08 tgl Exp $
2+
$PostgreSQL: pgsql/doc/src/sgml/ref/psql-ref.sgml,v 1.212 2008/11/0615:18:35 tgl Exp $
33
PostgreSQL documentation
44
-->
55

@@ -894,10 +894,13 @@ testdb=&gt;
894894

895895

896896
<varlistentry>
897-
<term><literal>\dC</literal></term>
897+
<term><literal>\dC [ <replaceable class="parameter">pattern</replaceable> ]</literal></term>
898898
<listitem>
899899
<para>
900900
Lists all available type casts.
901+
If <replaceable class="parameter">pattern</replaceable>
902+
is specified, only casts whose source or target types match the
903+
pattern are listed.
901904
</para>
902905
</listitem>
903906
</varlistentry>

‎src/bin/psql/describe.c

Lines changed: 32 additions & 6 deletions
Original file line numberDiff line numberDiff line change
@@ -8,7 +8,7 @@
88
*
99
* Copyright (c) 2000-2008, PostgreSQL Global Development Group
1010
*
11-
* $PostgreSQL: pgsql/src/bin/psql/describe.c,v 1.186 2008/11/03 19:08:56 tgl Exp $
11+
* $PostgreSQL: pgsql/src/bin/psql/describe.c,v 1.187 2008/11/06 15:18:35 tgl Exp $
1212
*/
1313
#include"postgres_fe.h"
1414

@@ -2082,10 +2082,10 @@ listCasts(const char *pattern)
20822082

20832083
initPQExpBuffer(&buf);
20842084
/*
2085-
* We need left joinherefor binary casts. Also note that we don't
2086-
*attempt to localize '(binary coercible)', because there's too much
2087-
*risk of gettext translating a function name that happens to match
2088-
* some string in the PO database.
2085+
* We needaleft jointo pg_procfor binary casts; the others are just
2086+
*paranoia. Also note that we don't attempt to localize '(binary
2087+
*coercible)', because there's too much risk of gettext translating a
2088+
*function name that happens to matchsome string in the PO database.
20892089
*/
20902090
printfPQExpBuffer(&buf,
20912091
"SELECT pg_catalog.format_type(castsource, NULL) AS \"%s\",\n"
@@ -2099,13 +2099,39 @@ listCasts(const char *pattern)
20992099
" END as \"%s\"\n"
21002100
"FROM pg_catalog.pg_cast c LEFT JOIN pg_catalog.pg_proc p\n"
21012101
" ON c.castfunc = p.oid\n"
2102-
"ORDER BY 1, 2",
2102+
" LEFT JOIN pg_catalog.pg_type ts\n"
2103+
" ON c.castsource = ts.oid\n"
2104+
" LEFT JOIN pg_catalog.pg_namespace ns\n"
2105+
" ON ns.oid = ts.typnamespace\n"
2106+
" LEFT JOIN pg_catalog.pg_type tt\n"
2107+
" ON c.casttarget = tt.oid\n"
2108+
" LEFT JOIN pg_catalog.pg_namespace nt\n"
2109+
" ON nt.oid = tt.typnamespace\n"
2110+
"WHERE (true",
21032111
gettext_noop("Source type"),
21042112
gettext_noop("Target type"),
21052113
gettext_noop("Function"),
21062114
gettext_noop("no"),gettext_noop("in assignment"),gettext_noop("yes"),
21072115
gettext_noop("Implicit?"));
21082116

2117+
/*
2118+
* Match name pattern against either internal or external name of either
2119+
* castsource or casttarget
2120+
*/
2121+
processSQLNamePattern(pset.db,&buf,pattern, true, false,
2122+
"ns.nspname","ts.typname",
2123+
"pg_catalog.format_type(ts.oid, NULL)",
2124+
"pg_catalog.pg_type_is_visible(ts.oid)");
2125+
2126+
appendPQExpBuffer(&buf,") OR (true");
2127+
2128+
processSQLNamePattern(pset.db,&buf,pattern, true, false,
2129+
"nt.nspname","tt.typname",
2130+
"pg_catalog.format_type(tt.oid, NULL)",
2131+
"pg_catalog.pg_type_is_visible(tt.oid)");
2132+
2133+
appendPQExpBuffer(&buf,")\nORDER BY 1, 2;");
2134+
21092135
res=PSQLexec(buf.data, false);
21102136
termPQExpBuffer(&buf);
21112137
if (!res)

‎src/bin/psql/help.c

Lines changed: 2 additions & 2 deletions
Original file line numberDiff line numberDiff line change
@@ -3,7 +3,7 @@
33
*
44
* Copyright (c) 2000-2008, PostgreSQL Global Development Group
55
*
6-
* $PostgreSQL: pgsql/src/bin/psql/help.c,v 1.130 2008/08/29 15:52:07 alvherre Exp $
6+
* $PostgreSQL: pgsql/src/bin/psql/help.c,v 1.131 2008/11/06 15:18:36 tgl Exp $
77
*/
88
#include"postgres_fe.h"
99

@@ -200,7 +200,7 @@ slashUsage(unsigned short int pager)
200200
fprintf(output,_(" \\da [PATTERN] list aggregate functions\n"));
201201
fprintf(output,_(" \\db [PATTERN] list tablespaces (add \"+\" for more detail)\n"));
202202
fprintf(output,_(" \\dc [PATTERN] list conversions\n"));
203-
fprintf(output,_(" \\dC list casts\n"));
203+
fprintf(output,_(" \\dC[PATTERN] list casts\n"));
204204
fprintf(output,_(" \\dd [PATTERN] show comment for object\n"));
205205
fprintf(output,_(" \\dD [PATTERN] list domains\n"));
206206
fprintf(output,_(" \\df [PATTERN] list functions (add \"+\" for more detail)\n"));

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