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# This test checks that constraints work on subscriber
use strict;
use warnings;
use PostgresNode;
use TestLib;
use Test::More tests => 4;
# Initialize publisher node
my $node_publisher = get_new_node('publisher');
$node_publisher->init(allows_streaming => 'logical');
$node_publisher->start;
# Create subscriber node
my $node_subscriber = get_new_node('subscriber');
$node_subscriber->init(allows_streaming => 'logical');
$node_subscriber->start;
# Setup structure on publisher
$node_publisher->safe_psql('postgres',
"CREATE TABLE tab_fk (bid int PRIMARY KEY);");
$node_publisher->safe_psql('postgres',
"CREATE TABLE tab_fk_ref (id int PRIMARY KEY, bid int REFERENCES tab_fk (bid));"
);
# Setup structure on subscriber
$node_subscriber->safe_psql('postgres',
"CREATE TABLE tab_fk (bid int PRIMARY KEY);");
$node_subscriber->safe_psql('postgres',
"CREATE TABLE tab_fk_ref (id int PRIMARY KEY, bid int REFERENCES tab_fk (bid));"
);
# 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 WITH (copy_data = false)"
);
$node_publisher->wait_for_catchup('tap_sub');
$node_publisher->safe_psql('postgres',
"INSERT INTO tab_fk (bid) VALUES (1);");
$node_publisher->safe_psql('postgres',
"INSERT INTO tab_fk_ref (id, bid) VALUES (1, 1);");
$node_publisher->wait_for_catchup('tap_sub');
# Check data on subscriber
my $result = $node_subscriber->safe_psql('postgres',
"SELECT count(*), min(bid), max(bid) FROM tab_fk;");
is($result, qq(1|1|1), 'check replicated tab_fk inserts on subscriber');
$result = $node_subscriber->safe_psql('postgres',
"SELECT count(*), min(bid), max(bid) FROM tab_fk_ref;");
is($result, qq(1|1|1), 'check replicated tab_fk_ref inserts on subscriber');
# Drop the fk on publisher
$node_publisher->safe_psql('postgres', "DROP TABLE tab_fk CASCADE;");
# Insert data
$node_publisher->safe_psql('postgres',
"INSERT INTO tab_fk_ref (id, bid) VALUES (2, 2);");
$node_publisher->wait_for_catchup('tap_sub');
# FK is not enforced on subscriber
$result = $node_subscriber->safe_psql('postgres',
"SELECT count(*), min(bid), max(bid) FROM tab_fk_ref;");
is($result, qq(2|1|2), 'check FK ignored on subscriber');
# Add replica trigger
$node_subscriber->safe_psql(
'postgres', qq{
CREATE FUNCTION filter_basic_dml_fn() RETURNS TRIGGER AS \$\$
BEGIN
IF (TG_OP = 'INSERT') THEN
IF (NEW.id < 10) THEN
RETURN NEW;
ELSE
RETURN NULL;
END IF;
ELSE
RAISE WARNING 'Unknown action';
RETURN NULL;
END IF;
END;
\$\$ LANGUAGE plpgsql;
CREATE TRIGGER filter_basic_dml_trg
BEFORE INSERT ON tab_fk_ref
FOR EACH ROW EXECUTE PROCEDURE filter_basic_dml_fn();
ALTER TABLE tab_fk_ref ENABLE REPLICA TRIGGER filter_basic_dml_trg;
});
# Insert data
$node_publisher->safe_psql('postgres',
"INSERT INTO tab_fk_ref (id, bid) VALUES (10, 10);");
$node_publisher->wait_for_catchup('tap_sub');
# The row should be skipped on subscriber
$result = $node_subscriber->safe_psql('postgres',
"SELECT count(*), min(bid), max(bid) FROM tab_fk_ref;");
is($result, qq(2|1|2), 'check replica trigger applied on subscriber');
$node_subscriber->stop('fast');
$node_publisher->stop('fast');
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