Do not filter by relkind in vacuumdb's catalog query if --table is used

If a user specifies a relation name which cannot be processed, then the
backend can warn directly about what is wrong with it.  This fixes an
oversight from e0c2933a.

Author: Nathan Bossart
Discussion: https://postgr.es/m/32049A78-C429-4742-AEC1-941C9ABDE7B8@amazon.com

src/bin/scripts/t/100_vacuumdb.pl

@@ -3,7 +3,7 @@ use warnings;
 
 use PostgresNode;
 use TestLib;
-use Test::More tests => 35;
+use Test::More tests => 38;
 
 program_help_ok('vacuumdb');
 program_version_ok('vacuumdb');
@@ -64,6 +64,7 @@ $node->safe_psql(
 	'postgres', q|
   CREATE TABLE "need""q(uot" (")x" text);
   CREATE TABLE vactable (a int, b int);
+  CREATE VIEW vacview AS SELECT 1 as a;
 
   CREATE FUNCTION f0(int) RETURNS int LANGUAGE SQL AS 'SELECT $1 * $1';
   CREATE FUNCTION f1(int) RETURNS int LANGUAGE SQL AS 'SELECT f0($1)';
@@ -88,3 +89,9 @@ $node->issues_sql_like(
 	[ 'vacuumdb', '--analyze-only', '--table', 'vactable(b)', 'postgres' ],
 	qr/statement: ANALYZE public.vactable\(b\);/,
 	'vacuumdb --analyze-only with partial column list');
+$node->command_checks_all(
+	[ 'vacuumdb', '--analyze', '--table', 'vacview', 'postgres' ],
+	0,
+	[qr/^.*vacuuming database "postgres"/],
+	[qr/^WARNING.*cannot vacuum non-tables or special system tables/s],
+	'vacuumdb with view');

src/bin/scripts/vacuumdb.c

@@ -484,6 +484,13 @@ vacuum_one_database(const char *dbname, vacuumingOptions *vacopts,
 		appendPQExpBuffer(&catalog_query, " JOIN listed_tables"
 						  " ON listed_tables.table_oid OPERATOR(pg_catalog.=) c.oid\n");
 
+	/*
+	 * If no tables were listed, filter for the relevant relation types.  If
+	 * tables were given via --table, don't bother filtering by relation type.
+	 * Instead, let the server decide whether a given relation can be
+	 * processed in which case the user will know about it.
+	 */
+	if (!tables_listed)
 		appendPQExpBuffer(&catalog_query, " WHERE c.relkind OPERATOR(pg_catalog.=) ANY (array["
 						  CppAsString2(RELKIND_RELATION) ", "
 						  CppAsString2(RELKIND_MATVIEW) "])\n");