vacuumdb: Fix excluding multiple schemas with -N

When specifying multiple schemas to exclude with -N parameters, none
of the schemas are actually excluded (a single -N worked as expected).
This fixes the catalog query to handle multiple exclusions and adds a
test for this case.

Backpatch to v16 where this was introduced.

Author: Nathan Bossart <nathandbossart@gmail.com>
Author: Kuwamura Masaki <kuwamura@db.is.i.nagoya-u.ac.jp>
Reported-by: Kuwamura Masaki <kuwamura@db.is.i.nagoya-u.ac.jp>
Discussion: https://postgr.es/m/CAMyC8qp9mXPQd5D6s6CJxvmignsbTqGZwDDB6VYJOn1A8WG38w@mail.gmail.com
Backpatch-through: 16

diff --git a/src/bin/scripts/t/100_vacuumdb.pl b/src/bin/scripts/t/100_vacuumdb.pl
index eccfcc54a1a196d3a146d42b5baad271f6d39c14..925079bbedb6fe5b0e345dfebf8b8d5a37ebc8fc 100644 (file)
--- a/src/bin/scripts/t/100_vacuumdb.pl
+++ b/src/bin/scripts/t/100_vacuumdb.pl
@@ -112,6 +112,8 @@ $node->safe_psql(
   CREATE INDEX i0 ON funcidx ((f1(x)));
   CREATE SCHEMA "Foo";
   CREATE TABLE "Foo".bar(id int);
+  CREATE SCHEMA "Bar";
+  CREATE TABLE "Bar".baz(id int);
 |);
 $node->command_ok([qw|vacuumdb -Z --table="need""q(uot"(")x") postgres|],
    'column list');
@@ -159,10 +161,21 @@ $node->issues_sql_like(
    [ 'vacuumdb', '--schema', '"Foo"', 'postgres' ],
    qr/VACUUM \(SKIP_DATABASE_STATS\) "Foo".bar/,
    'vacuumdb --schema');
+$node->issues_sql_like(
+   [ 'vacuumdb', '--schema', '"Foo"', '--schema', '"Bar"', 'postgres' ],
+   qr/VACUUM\ \(SKIP_DATABASE_STATS\)\ "Foo".bar
+       .*VACUUM\ \(SKIP_DATABASE_STATS\)\ "Bar".baz
+   /sx,
+   'vacuumdb multiple --schema switches');
 $node->issues_sql_like(
    [ 'vacuumdb', '--exclude-schema', '"Foo"', 'postgres' ],
-   qr/(?:(?!VACUUM "Foo".bar).)*/,
+   qr/^(?!.*VACUUM \(SKIP_DATABASE_STATS\) "Foo".bar).*$/s,
    'vacuumdb --exclude-schema');
+$node->issues_sql_like(
+   [ 'vacuumdb', '--exclude-schema', '"Foo"', '--exclude-schema', '"Bar"', 'postgres' ],
+   qr/^(?!.*VACUUM\ \(SKIP_DATABASE_STATS\)\ "Foo".bar
+   | VACUUM\ \(SKIP_DATABASE_STATS\)\ "Bar".baz).*$/sx,
+   'vacuumdb multiple --exclude-schema switches');
 $node->command_fails_like(
    [ 'vacuumdb', '-N', 'pg_catalog', '-t', 'pg_class', 'postgres', ],
    qr/cannot vacuum specific table\(s\) and exclude schema\(s\) at the same time/,

diff --git a/src/bin/scripts/vacuumdb.c b/src/bin/scripts/vacuumdb.c
index 005b064c06cd16768eafbed070cfc0250a9b5260..557ab5d8e136903ba80c5514fcb9068b09008f66 100644 (file)
--- a/src/bin/scripts/vacuumdb.c
+++ b/src/bin/scripts/vacuumdb.c
@@ -678,18 +678,22 @@ vacuum_one_database(ConnParams *cparams,
    /* Used to match the tables or schemas listed by the user */
    if (objects_listed)
    {
-       appendPQExpBufferStr(&catalog_query, " JOIN listed_objects"
-                            " ON listed_objects.object_oid ");
-
-       if (objfilter & OBJFILTER_SCHEMA_EXCLUDE)
-           appendPQExpBufferStr(&catalog_query, "OPERATOR(pg_catalog.!=) ");
-       else
-           appendPQExpBufferStr(&catalog_query, "OPERATOR(pg_catalog.=) ");
+       appendPQExpBufferStr(&catalog_query, " LEFT JOIN listed_objects"
+                            " ON listed_objects.object_oid"
+                            " OPERATOR(pg_catalog.=) ");
 
        if (objfilter & OBJFILTER_TABLE)
            appendPQExpBufferStr(&catalog_query, "c.oid\n");
        else
            appendPQExpBufferStr(&catalog_query, "ns.oid\n");
+
+       if (objfilter & OBJFILTER_SCHEMA_EXCLUDE)
+           appendPQExpBuffer(&catalog_query,
+                             " WHERE listed_objects.object_oid IS NULL\n");
+       else
+           appendPQExpBuffer(&catalog_query,
+                             " WHERE listed_objects.object_oid IS NOT NULL\n");
+       has_where = true;
    }
 
    /*
@@ -700,9 +704,11 @@ vacuum_one_database(ConnParams *cparams,
     */
    if ((objfilter & OBJFILTER_TABLE) == 0)
    {
-       appendPQExpBufferStr(&catalog_query, " WHERE c.relkind OPERATOR(pg_catalog.=) ANY (array["
-                            CppAsString2(RELKIND_RELATION) ", "
-                            CppAsString2(RELKIND_MATVIEW) "])\n");
+       appendPQExpBuffer(&catalog_query,
+                         " %s c.relkind OPERATOR(pg_catalog.=) ANY (array["
+                         CppAsString2(RELKIND_RELATION) ", "
+                         CppAsString2(RELKIND_MATVIEW) "])\n",
+                         has_where ? "AND" : "WHERE");
        has_where = true;
    }