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# Copyright (c) 2021, PostgreSQL Global Development Group
# Test CREATE INDEX CONCURRENTLY with concurrent modifications
use strict;
use warnings;
use Config;
use PostgresNode;
use TestLib;
use Test::More tests => 3;
my ($node, $result);
#
# Test set-up
#
$node = get_new_node('CIC_test');
$node->init;
$node->append_conf('postgresql.conf',
'lock_timeout = ' . (1000 * $TestLib::timeout_default));
$node->start;
$node->safe_psql('postgres', q(CREATE EXTENSION amcheck));
$node->safe_psql('postgres', q(CREATE TABLE tbl(i int)));
$node->safe_psql('postgres', q(CREATE INDEX idx ON tbl(i)));
#
# Stress CIC with pgbench.
#
# pgbench might try to launch more than one instance of the CIC
# transaction concurrently. That would deadlock, so use an advisory
# lock to ensure only one CIC runs at a time.
#
$node->pgbench(
'--no-vacuum --client=5 --transactions=100',
0,
[qr{actually processed}],
[qr{^$}],
'concurrent INSERTs and CIC',
{
'002_pgbench_concurrent_transaction' => q(
BEGIN;
INSERT INTO tbl VALUES(0);
COMMIT;
),
'002_pgbench_concurrent_transaction_savepoints' => q(
BEGIN;
SAVEPOINT s1;
INSERT INTO tbl VALUES(0);
COMMIT;
),
'002_pgbench_concurrent_cic' => q(
SELECT pg_try_advisory_lock(42)::integer AS gotlock \gset
\if :gotlock
DROP INDEX CONCURRENTLY idx;
CREATE INDEX CONCURRENTLY idx ON tbl(i);
SELECT bt_index_check('idx',true);
SELECT pg_advisory_unlock(42);
\endif
)
});
$node->stop;
done_testing();
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