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Aggregate functions now support multiple input arguments. I also took

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the opportunity to treat COUNT(*) as a zero-argument aggregate instead
of the old hack that equated it to COUNT(1); this is materially cleaner
(no more weird ANYOID cases) and ought to be at least a tiny bit faster.
Original patch by Sergey Koposov; review, documentation, simple regression
tests, pg_dump and psql support by moi.
This commit is contained in:
Tom Lane
2006-07-27 19:52:07 +00:00
parent c2d1138351
commit 108fe47301
39 changed files with 702 additions and 484 deletions
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19
src/bin/psql/describe.c
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@ -3,7 +3,7 @@
*
* Copyright (c) 2000-2006, PostgreSQL Global Development Group
*
* $PostgreSQL: pgsql/src/bin/psql/describe.c,v 1.141 2006/07/17 00:21:23 neilc Exp $
* $PostgreSQL: pgsql/src/bin/psql/describe.c,v 1.142 2006/07/27 19:52:06 tgl Exp $
*/
#include "postgres_fe.h"
#include "describe.h"
@ -67,17 +67,22 @@ describeAggregates(const char *pattern, bool verbose)
printfPQExpBuffer(&buf,
"SELECT n.nspname as \"%s\",\n"
" p.proname AS \"%s\",\n"
" CASE p.proargtypes[0]\n"
" WHEN 'pg_catalog.\"any\"'::pg_catalog.regtype\n"
" THEN CAST('%s' AS pg_catalog.text)\n"
" ELSE pg_catalog.format_type(p.proargtypes[0], NULL)\n"
" CASE WHEN p.pronargs = 0\n"
" THEN CAST('*' AS pg_catalog.text)\n"
" ELSE\n"
" pg_catalog.array_to_string(ARRAY(\n"
" SELECT\n"
" pg_catalog.format_type(p.proargtypes[s.i], NULL)\n"
" FROM\n"
" pg_catalog.generate_series(0, pg_catalog.array_upper(p.proargtypes, 1)) AS s(i)\n"
" ), ', ')\n"
" END AS \"%s\",\n"
" pg_catalog.obj_description(p.oid, 'pg_proc') as \"%s\"\n"
"FROM pg_catalog.pg_proc p\n"
" LEFT JOIN pg_catalog.pg_namespace n ON n.oid = p.pronamespace\n"
"WHERE p.proisagg\n",
_("Schema"), _("Name"), _("(all types)"),
_("Data type"), _("Description"));
_("Schema"), _("Name"),
_("Argument data types"), _("Description"));
processNamePattern(&buf, pattern, true, false,
"n.nspname", "p.proname", NULL,