Adding upstream version 16.2.upstream/16.2

Signed-off-by: Daniel Baumann <daniel.baumann@progress-linux.org>

1 files changed, 124 insertions, 0 deletions

diff --git a/src/test/subscription/t/008_diff_schema.pl b/src/test/subscription/t/008_diff_schema.pl
new file mode 100644
index 0000000..67db1eb
--- /dev/null
+++ b/src/test/subscription/t/008_diff_schema.pl
@@ -0,0 +1,124 @@
+
+# Copyright (c) 2021-2023, PostgreSQL Global Development Group
+
+# Test behavior with different schema on subscriber
+use strict;
+use warnings;
+use PostgreSQL::Test::Cluster;
+use PostgreSQL::Test::Utils;
+use Test::More;
+
+# Create publisher node
+my $node_publisher = PostgreSQL::Test::Cluster->new('publisher');
+$node_publisher->init(allows_streaming => 'logical');
+$node_publisher->start;
+
+# Create subscriber node
+my $node_subscriber = PostgreSQL::Test::Cluster->new('subscriber');
+$node_subscriber->init(allows_streaming => 'logical');
+$node_subscriber->start;
+
+# Create some preexisting content on publisher
+$node_publisher->safe_psql('postgres',
+	"CREATE TABLE test_tab (a int primary key, b varchar)");
+$node_publisher->safe_psql('postgres',
+	"INSERT INTO test_tab VALUES (1, 'foo'), (2, 'bar')");
+
+# Setup structure on subscriber
+$node_subscriber->safe_psql('postgres',
+	"CREATE TABLE test_tab (a int primary key, b text, c timestamptz DEFAULT now(), d bigint DEFAULT 999, e int GENERATED BY DEFAULT AS IDENTITY)"
+);
+
+# Setup logical replication
+my $publisher_connstr = $node_publisher->connstr . ' dbname=postgres';
+$node_publisher->safe_psql('postgres',
+	"CREATE PUBLICATION tap_pub FOR ALL TABLES");
+
+$node_subscriber->safe_psql('postgres',
+	"CREATE SUBSCRIPTION tap_sub CONNECTION '$publisher_connstr' PUBLICATION tap_pub"
+);
+
+# Wait for initial table sync to finish
+$node_subscriber->wait_for_subscription_sync($node_publisher, 'tap_sub');
+
+my $result =
+  $node_subscriber->safe_psql('postgres',
+	"SELECT count(*), count(c), count(d = 999) FROM test_tab");
+is($result, qq(2|2|2), 'check initial data was copied to subscriber');
+
+# Update the rows on the publisher and check the additional columns on
+# subscriber didn't change
+$node_publisher->safe_psql('postgres', "UPDATE test_tab SET b = md5(b)");
+
+$node_publisher->wait_for_catchup('tap_sub');
+
+$result =
+  $node_subscriber->safe_psql('postgres',
+	"SELECT count(*), count(c), count(d = 999), count(e) FROM test_tab");
+is($result, qq(2|2|2|2),
+	'check extra columns contain local defaults after copy');
+
+# Change the local values of the extra columns on the subscriber,
+# update publisher, and check that subscriber retains the expected
+# values
+$node_subscriber->safe_psql('postgres',
+	"UPDATE test_tab SET c = 'epoch'::timestamptz + 987654321 * interval '1s'"
+);
+$node_publisher->safe_psql('postgres',
+	"UPDATE test_tab SET b = md5(a::text)");
+
+$node_publisher->wait_for_catchup('tap_sub');
+
+$result = $node_subscriber->safe_psql('postgres',
+	"SELECT count(*), count(extract(epoch from c) = 987654321), count(d = 999) FROM test_tab"
+);
+is($result, qq(2|2|2), 'check extra columns contain locally changed data');
+
+# Another insert
+$node_publisher->safe_psql('postgres',
+	"INSERT INTO test_tab VALUES (3, 'baz')");
+
+$node_publisher->wait_for_catchup('tap_sub');
+
+$result =
+  $node_subscriber->safe_psql('postgres',
+	"SELECT count(*), count(c), count(d = 999), count(e) FROM test_tab");
+is($result, qq(3|3|3|3),
+	'check extra columns contain local defaults after apply');
+
+
+# Check a bug about adding a replica identity column on the subscriber
+# that was not yet mapped to a column on the publisher.  This would
+# result in errors on the subscriber and replication thus not
+# progressing.
+# (https://www.postgresql.org/message-id/flat/a9139c29-7ddd-973b-aa7f-71fed9c38d75%40minerva.info)
+
+$node_publisher->safe_psql('postgres', "CREATE TABLE test_tab2 (a int)");
+
+$node_subscriber->safe_psql('postgres', "CREATE TABLE test_tab2 (a int)");
+
+$node_subscriber->safe_psql('postgres',
+	"ALTER SUBSCRIPTION tap_sub REFRESH PUBLICATION");
+
+$node_subscriber->wait_for_subscription_sync;
+
+# Add replica identity column.  (The serial is not necessary, but it's
+# a convenient way to get a default on the new column so that rows
+# from the publisher that don't have the column yet can be inserted.)
+$node_subscriber->safe_psql('postgres',
+	"ALTER TABLE test_tab2 ADD COLUMN b serial PRIMARY KEY");
+
+$node_publisher->safe_psql('postgres', "INSERT INTO test_tab2 VALUES (1)");
+
+$node_publisher->wait_for_catchup('tap_sub');
+
+is( $node_subscriber->safe_psql(
+		'postgres', "SELECT count(*), min(a), max(a) FROM test_tab2"),
+	qq(1|1|1),
+	'check replicated inserts on subscriber');
+
+
+$node_subscriber->stop;
+$node_publisher->stop;
+
+done_testing();