use strict;
use warnings;

use TestLib;
use Test::More tests => 3;

# Test concurrent insertion into table with UNIQUE oid column.  DDL expects
# GetNewOidWithIndex() to successfully avoid violating uniqueness for indexes
# like pg_class_oid_index and pg_proc_oid_index.  This indirectly exercises
# LWLock and spinlock concurrency.  This test makes a 5-MiB table.
my $tempdir = tempdir;
start_test_server $tempdir;
psql('postgres',
	    'CREATE UNLOGGED TABLE oid_tbl () WITH OIDS; '
	  . 'ALTER TABLE oid_tbl ADD UNIQUE (oid);');
my $script = "$tempdir/pgbench_script";
open my $fh, ">", $script or die "could not open file $script";
print $fh 'INSERT INTO oid_tbl SELECT FROM generate_series(1,1000);';
close $fh;
command_like(
	[   qw(pgbench --no-vacuum --client=5 --protocol=prepared
		  --transactions=25 --file), $script, 'postgres' ],
	qr{processed: 125/125},
	'concurrent OID generation');