# Copyright (c) 2023-2025, PostgreSQL Global Development Group
# Test for pg_upgrade of logical subscription. Note that after the successful # upgrade test, we can't use the old cluster to prevent failing in --link mode.
use strict;
use warnings FATAL => 'all';
use File::Find qw(find);
use File::Path qw(rmtree);
use PostgreSQL::Test::Cluster;
use PostgreSQL::Test::Utils;
use Test::More;
# Can be changed to test the other modes.
my $mode = $ENV{PG_TEST_PG_UPGRADE_MODE} || '--copy';
# Initialize the old subscriber node
my $old_sub = PostgreSQL::Test::Cluster->new('old_sub');
$old_sub->init;
$old_sub->start;
my $oldbindir = $old_sub->config_data('--bindir');
# Initialize the new subscriber
my $new_sub = PostgreSQL::Test::Cluster->new('new_sub');
$new_sub->init;
my $newbindir = $new_sub->config_data('--bindir');
# In a VPATH build, we'll be started in the source directory, but we want # to run pg_upgrade in the build directory so that any files generated finish # in it, like delete_old_cluster.{sh,bat}.
chdir ${PostgreSQL::Test::Utils::tmp_check};
# Remember a connection string for the publisher node. It would be used # several times.
my $connstr = $publisher->connstr . ' dbname=postgres';
# ------------------------------------------------------ # Check that pg_upgrade fails when max_active_replication_origins configured # in the new cluster is less than the number of subscriptions in the old # cluster. # ------------------------------------------------------ # It is sufficient to use disabled subscription to test upgrade failure.
$publisher->safe_psql('postgres', "CREATE PUBLICATION regress_pub1");
$old_sub->safe_psql('postgres', "CREATE SUBSCRIPTION regress_sub1 CONNECTION '$connstr' PUBLICATION regress_pub1 WITH (enabled = false)"
);
# pg_upgrade will fail because the new cluster has insufficient # max_active_replication_origins.
command_checks_all(
[ 'pg_upgrade', '--no-sync', '--old-datadir' => $old_sub->data_dir, '--new-datadir' => $new_sub->data_dir, '--old-bindir' => $oldbindir, '--new-bindir' => $newbindir, '--socketdir' => $new_sub->host, '--old-port' => $old_sub->port, '--new-port' => $new_sub->port,
$mode, '--check',
], 1,
[
qr/"max_active_replication_origins" \(0\) must be greater than or equal to the number of subscriptions \(1\) on the old cluster/
],
[qr//], 'run of pg_upgrade where the new cluster has insufficient max_active_replication_origins'
);
# ------------------------------------------------------ # Check that pg_upgrade refuses to run if: # a) there's a subscription with tables in a state other than 'r' (ready) or # 'i' (init) and/or # b) the subscription has no replication origin. # ------------------------------------------------------
$publisher->safe_psql( 'postgres', qq[
CREATE TABLE tab_primary_key(id serial PRIMARY KEY);
INSERT INTO tab_primary_key values(1);
CREATE PUBLICATION regress_pub2 FOR TABLE tab_primary_key;
]);
# Insert the same value that is already present in publisher to the primary key # column of subscriber so that the table sync will fail.
$old_sub->safe_psql( 'postgres', qq[
CREATE TABLE tab_primary_key(id serial PRIMARY KEY);
INSERT INTO tab_primary_key values(1);
CREATE SUBSCRIPTION regress_sub2 CONNECTION '$connstr' PUBLICATION regress_pub2;
]);
# Table will be in 'd' (data is being copied) state as table sync will fail # because of primary key constraint error.
my $started_query = "SELECT count(1) = 1 FROM pg_subscription_rel WHERE srsubstate = 'd'";
$old_sub->poll_query_until('postgres', $started_query)
or die "Timed out while waiting for the table state to become 'd' (datasync)";
# Setup another logical replication and drop the subscription's replication # origin.
$publisher->safe_psql('postgres', "CREATE PUBLICATION regress_pub3");
$old_sub->safe_psql('postgres', "CREATE SUBSCRIPTION regress_sub3 CONNECTION '$connstr' PUBLICATION regress_pub3 WITH (enabled = false)"
);
my $sub_oid = $old_sub->safe_psql('postgres', "SELECT oid FROM pg_subscription WHERE subname = 'regress_sub3'");
my $reporigin = 'pg_' . qq($sub_oid);
$old_sub->safe_psql('postgres', "SELECT pg_replication_origin_drop('$reporigin')");
$old_sub->stop;
command_checks_all(
[ 'pg_upgrade', '--no-sync', '--old-datadir' => $old_sub->data_dir, '--new-datadir' => $new_sub->data_dir, '--old-bindir' => $oldbindir, '--new-bindir' => $newbindir, '--socketdir' => $new_sub->host, '--old-port' => $old_sub->port, '--new-port' => $new_sub->port,
$mode, '--check',
], 1,
[
qr/\QYour installation contains subscriptions without origin or having relations not in i (initialize) or r (ready) state\E/
],
[], 'run of pg_upgrade --check for old instance with relation in \'d\' datasync(invalid) state and missing replication origin'
);
# Verify the reason why the subscriber cannot be upgraded
my $sub_relstate_filename;
# Find a txt file that contains a list of tables that cannot be upgraded. We # cannot predict the file's path because the output directory contains a # milliseconds timestamp. File::Find::find must be used.
find(
sub { if ($File::Find::name =~ m/subs_invalid\.txt/)
{
$sub_relstate_filename = $File::Find::name;
}
},
$new_sub->data_dir . "/pg_upgrade_output.d");
# Check the file content which should have tab_primary_key table in an invalid # state.
like(
slurp_file($sub_relstate_filename),
qr/The table sync state \"d\" is not allowed for database:\"postgres\" subscription:\"regress_sub2\" schema:\"public\" relation:\"tab_primary_key\"/m, 'the previous test failed due to subscription table in invalid state');
# Check the file content which should have regress_sub3 subscription.
like(
slurp_file($sub_relstate_filename),
qr/The replication origin is missing for database:\"postgres\" subscription:\"regress_sub3\"/m, 'the previous test failed due to missing replication origin');
# Cleanup
$old_sub->start;
$publisher->safe_psql( 'postgres', qq[
DROP PUBLICATION regress_pub2;
DROP PUBLICATION regress_pub3;
DROP TABLE tab_primary_key;
]);
$old_sub->safe_psql( 'postgres', qq[
DROP SUBSCRIPTION regress_sub2;
DROP SUBSCRIPTION regress_sub3;
DROP TABLE tab_primary_key;
]);
rmtree($new_sub->data_dir . "/pg_upgrade_output.d");
# Verify that the upgrade should be successful with tables in 'ready'/'init' # state along with retaining the replication origin's remote lsn, # subscription's running status, and failover option. Use multiple tables to # verify deterministic pg_dump ordering of subscription relations during # --binary-upgrade.
$publisher->safe_psql( 'postgres', qq[
CREATE TABLE tab_upgraded(id int);
CREATE TABLE tab_upgraded1(id int);
CREATE PUBLICATION regress_pub4 FOR TABLE tab_upgraded, tab_upgraded1;
]);
# Wait till the tables tab_upgraded and tab_upgraded1 reach 'ready' state
my $synced_query = "SELECT count(1) = 2 FROM pg_subscription_rel WHERE srsubstate = 'r'";
$old_sub->poll_query_until('postgres', $synced_query)
or die "Timed out while waiting for the table to reach ready state";
$publisher->safe_psql('postgres', "INSERT INTO tab_upgraded1 VALUES (generate_series(1,50))");
$publisher->wait_for_catchup('regress_sub4');
# Change configuration to prepare a subscription table in init state
$old_sub->append_conf('postgresql.conf', "max_logical_replication_workers = 0");
$old_sub->restart;
# The table tab_upgraded2 will be in the init state as the subscriber's # configuration for max_logical_replication_workers is set to 0.
my $result = $old_sub->safe_psql('postgres', "SELECT count(1) = 1 FROM pg_subscription_rel WHERE srsubstate = 'i'");
is($result, qq(t), "Check that the table is in init state");
# Get the replication origin's remote_lsn of the old subscriber
my $remote_lsn = $old_sub->safe_psql('postgres', "SELECT remote_lsn FROM pg_replication_origin_status os, pg_subscription s WHERE os.external_id = 'pg_' || s.oid AND s.subname = 'regress_sub4'"
); # Have the subscription in disabled state before upgrade
$old_sub->safe_psql('postgres', "ALTER SUBSCRIPTION regress_sub5 DISABLE");
my $tab_upgraded_oid = $old_sub->safe_psql('postgres', "SELECT oid FROM pg_class WHERE relname = 'tab_upgraded'");
my $tab_upgraded1_oid = $old_sub->safe_psql('postgres', "SELECT oid FROM pg_class WHERE relname = 'tab_upgraded1'");
my $tab_upgraded2_oid = $old_sub->safe_psql('postgres', "SELECT oid FROM pg_class WHERE relname = 'tab_upgraded2'");
$old_sub->stop;
# Change configuration so that initial table sync does not get started # automatically
$new_sub->append_conf('postgresql.conf', "max_logical_replication_workers = 0");
# ------------------------------------------------------ # Check that pg_upgrade is successful when all tables are in ready or in # init state (tab_upgraded and tab_upgraded1 tables are in ready state and # tab_upgraded2 table is in init state) along with retaining the replication # origin's remote lsn, subscription's running status, and failover option. # ------------------------------------------------------
command_ok(
[ 'pg_upgrade', '--no-sync', '--old-datadir' => $old_sub->data_dir, '--new-datadir' => $new_sub->data_dir, '--old-bindir' => $oldbindir, '--new-bindir' => $newbindir, '--socketdir' => $new_sub->host, '--old-port' => $old_sub->port, '--new-port' => $new_sub->port,
$mode
], 'run of pg_upgrade for old instance when the subscription tables are in init/ready state'
);
ok( !-d $new_sub->data_dir . "/pg_upgrade_output.d", "pg_upgrade_output.d/ removed after successful pg_upgrade");
# ------------------------------------------------------ # Check that the data inserted to the publisher when the new subscriber is down # will be replicated once it is started. Also check that the old subscription # states and relations origins are all preserved. # ------------------------------------------------------
$publisher->safe_psql( 'postgres', qq[
INSERT INTO tab_upgraded1 VALUES(51);
INSERT INTO tab_upgraded2 VALUES(1);
]);
$new_sub->start;
# The subscription's running status and failover option should be preserved # in the upgraded instance. So regress_sub4 should still have subenabled and # subfailover set to true, while regress_sub5 should have both set to false.
$result = $new_sub->safe_psql('postgres', "SELECT subname, subenabled, subfailover FROM pg_subscription ORDER BY subname"
);
is( $result, qq(regress_sub4|t|t
regress_sub5|f|f), "check that the subscription's running status and failover are preserved"
);
# Subscription relations should be preserved
$result = $new_sub->safe_psql('postgres', "SELECT srrelid, srsubstate FROM pg_subscription_rel ORDER BY srrelid");
is( $result, qq($tab_upgraded_oid|r
$tab_upgraded1_oid|r
$tab_upgraded2_oid|i), "there should be 3 rows in pg_subscription_rel(representing tab_upgraded, tab_upgraded1 and tab_upgraded2)"
);
# The replication origin's remote_lsn should be preserved
$sub_oid = $new_sub->safe_psql('postgres', "SELECT oid FROM pg_subscription WHERE subname = 'regress_sub4'");
$result = $new_sub->safe_psql('postgres', "SELECT remote_lsn FROM pg_replication_origin_status WHERE external_id = 'pg_' || $sub_oid"
);
is($result, qq($remote_lsn), "remote_lsn should have been preserved");
# Resume the initial sync and wait until all tables of subscription # 'regress_sub5' are synchronized
$new_sub->append_conf('postgresql.conf', "max_logical_replication_workers = 10");
$new_sub->restart;
$new_sub->safe_psql('postgres', "ALTER SUBSCRIPTION regress_sub5 ENABLE");
$new_sub->wait_for_subscription_sync($publisher, 'regress_sub5');
# wait for regress_sub4 to catchup as well
$publisher->wait_for_catchup('regress_sub4');
# Rows on tab_upgraded1 and tab_upgraded2 should have been replicated
$result =
$new_sub->safe_psql('postgres', "SELECT count(*) FROM tab_upgraded1");
is($result, qq(51), "check replicated inserts on new subscriber");
$result =
$new_sub->safe_psql('postgres', "SELECT count(*) FROM tab_upgraded2");
is($result, qq(1), "check the data is synced after enabling the subscription for the table that was in init state"
);
done_testing();
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