1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
|
# Copyright (c) 2021-2022, PostgreSQL Global Development Group
# Test streaming of large transaction with DDL and subtransactions
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->append_conf('postgresql.conf',
'logical_decoding_work_mem = 64kB');
$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 INT, d INT, e INT, f 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)"
);
$node_publisher->wait_for_catchup($appname);
# Also wait for initial table sync to finish
my $synced_query =
"SELECT count(1) = 0 FROM pg_subscription_rel WHERE srsubstate NOT IN ('r', 's');";
$node_subscriber->poll_query_until('postgres', $synced_query)
or die "Timed out while waiting for subscriber to synchronize data";
my $result =
$node_subscriber->safe_psql('postgres',
"SELECT count(*), count(c), count(d = 999) FROM test_tab");
is($result, qq(2|0|0), 'check initial data was copied to subscriber');
# a small (non-streamed) transaction with DDL and DML
$node_publisher->safe_psql(
'postgres', q{
BEGIN;
INSERT INTO test_tab VALUES (3, md5(3::text));
ALTER TABLE test_tab ADD COLUMN c INT;
SAVEPOINT s1;
INSERT INTO test_tab VALUES (4, md5(4::text), -4);
COMMIT;
});
# large (streamed) transaction with DDL and DML
$node_publisher->safe_psql(
'postgres', q{
BEGIN;
INSERT INTO test_tab SELECT i, md5(i::text), -i FROM generate_series(5, 1000) s(i);
ALTER TABLE test_tab ADD COLUMN d INT;
SAVEPOINT s1;
INSERT INTO test_tab SELECT i, md5(i::text), -i, 2*i FROM generate_series(1001, 2000) s(i);
COMMIT;
});
# a small (non-streamed) transaction with DDL and DML
$node_publisher->safe_psql(
'postgres', q{
BEGIN;
INSERT INTO test_tab VALUES (2001, md5(2001::text), -2001, 2*2001);
ALTER TABLE test_tab ADD COLUMN e INT;
SAVEPOINT s1;
INSERT INTO test_tab VALUES (2002, md5(2002::text), -2002, 2*2002, -3*2002);
COMMIT;
});
$node_publisher->wait_for_catchup($appname);
$result =
$node_subscriber->safe_psql('postgres',
"SELECT count(*), count(c), count(d), count(e) FROM test_tab");
is($result, qq(2002|1999|1002|1),
'check data was copied to subscriber in streaming mode and extra columns contain local defaults'
);
# A large (streamed) transaction with DDL and DML. One of the DDL is performed
# after DML to ensure that we invalidate the schema sent for test_tab so that
# the next transaction has to send the schema again.
$node_publisher->safe_psql(
'postgres', q{
BEGIN;
INSERT INTO test_tab SELECT i, md5(i::text), -i, 2*i, -3*i FROM generate_series(2003,5000) s(i);
ALTER TABLE test_tab ADD COLUMN f INT;
COMMIT;
});
# A small transaction that won't get streamed. This is just to ensure that we
# send the schema again to reflect the last column added in the previous test.
$node_publisher->safe_psql(
'postgres', q{
BEGIN;
INSERT INTO test_tab SELECT i, md5(i::text), -i, 2*i, -3*i, 4*i FROM generate_series(5001,5005) s(i);
COMMIT;
});
$node_publisher->wait_for_catchup($appname);
$result =
$node_subscriber->safe_psql('postgres',
"SELECT count(*), count(c), count(d), count(e), count(f) FROM test_tab");
is($result, qq(5005|5002|4005|3004|5),
'check data was copied to subscriber for both streaming and non-streaming transactions'
);
$node_subscriber->stop;
$node_publisher->stop;
done_testing();
|
