# Copyright (c) 2021-2024, PostgreSQL Global Development Group

# Test streaming of transaction with subtransactions, DDLs, DMLs, and
# rollbacks
#
# This file is mainly to test the DDL/DML interaction of the publisher side,
# so we didn't add a parallel apply version for the tests in this file.
use strict;
use warnings FATAL => 'all';
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->append_conf('postgresql.conf',
	'debug_logical_replication_streaming = immediate');
$node_publisher->start;

# Create subscriber node
my $node_subscriber = PostgreSQL::Test::Cluster->new('subscriber');
$node_subscriber->init;
$node_subscriber->start;

# Create some preexisting content on publisher
$node_publisher->safe_psql('postgres',
	"CREATE TABLE test_tab (a int primary key, b bytea)");
$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 bytea, c INT, d INT, e INT)"
);

# Setup logical replication
my $publisher_connstr = $node_publisher->connstr . ' dbname=postgres';
$node_publisher->safe_psql('postgres',
	"CREATE PUBLICATION tap_pub FOR TABLE test_tab");

my $appname = 'tap_sub';
$node_subscriber->safe_psql('postgres',
	"CREATE SUBSCRIPTION tap_sub CONNECTION '$publisher_connstr application_name=$appname' PUBLICATION tap_pub WITH (streaming = on)"
);

# Wait for initial table sync to finish
$node_subscriber->wait_for_subscription_sync($node_publisher, $appname);

my $result =
  $node_subscriber->safe_psql('postgres',
	"SELECT count(*), count(c) FROM test_tab");
is($result, qq(2|0), 'check initial data was copied to subscriber');

# streamed transaction with DDL, DML and ROLLBACKs
$node_publisher->safe_psql(
	'postgres', q{
BEGIN;
INSERT INTO test_tab VALUES (3, sha256(3::text::bytea));
ALTER TABLE test_tab ADD COLUMN c INT;
SAVEPOINT s1;
INSERT INTO test_tab VALUES (4, sha256(4::text::bytea), -4);
ALTER TABLE test_tab ADD COLUMN d INT;
SAVEPOINT s2;
INSERT INTO test_tab VALUES (5, sha256(5::text::bytea), -5, 5*2);
ALTER TABLE test_tab ADD COLUMN e INT;
SAVEPOINT s3;
INSERT INTO test_tab VALUES (6, sha256(6::text::bytea), -6, 6*2, -6*3);
ALTER TABLE test_tab DROP COLUMN c;
ROLLBACK TO s1;
INSERT INTO test_tab VALUES (4, sha256(4::text::bytea), 4);
COMMIT;
});

$node_publisher->wait_for_catchup($appname);

$result =
  $node_subscriber->safe_psql('postgres',
	"SELECT count(*), count(c) FROM test_tab");
is($result, qq(4|1),
	'check rollback to savepoint was reflected on subscriber and extra columns contain local defaults'
);

$node_subscriber->stop;
$node_publisher->stop;

done_testing();