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#!/bin/sh
# Copyright (C) 2017-2022 Internet Systems Consortium, Inc. ("ISC")
#
# This Source Code Form is subject to the terms of the Mozilla Public
# License, v. 2.0. If a copy of the MPL was not distributed with this
# file, You can obtain one at http://mozilla.org/MPL/2.0/.
# shellcheck disable=SC1091
# SC1091: Not following: ... was not specified as input (see shellcheck -x).
# Exit with error if commands exit with non-zero and if undefined variables are
# used.
set -eu
# shellcheck disable=SC2034
# SC2034: ... appears unused. Verify use (or export if used externally).
prefix="@prefix@"
# Include utilities. Use installed version if available and
# use build version if it isn't.
if [ -e @datarootdir@/@PACKAGE_NAME@/scripts/admin-utils.sh ]; then
. "@datarootdir@/@PACKAGE_NAME@/scripts/admin-utils.sh"
else
. "@abs_top_builddir@/src/bin/admin/admin-utils.sh"
fi
VERSION=$(pgsql_version "$@")
if [ "$VERSION" != "3.1" ]; then
printf 'This script upgrades 3.1 to 3.2. '
printf 'Reported version is %s. Skipping upgrade.\n' "${VERSION}"
exit 0
fi
psql "$@" >/dev/null <<EOF
START TRANSACTION;
-- Remove constraints which perform too restrictive checks on the inserted
-- host reservations. We want to be able to insert host reservations which
-- include no specific IPv4 address or those that have repeating subnet
-- identifiers, e.g. IPv4 reservations would typically include 0 (or null)
-- IPv6 subnet identifiers.
ALTER TABLE hosts DROP CONSTRAINT key_dhcp4_ipv4_address_subnet_id;
ALTER TABLE hosts DROP CONSTRAINT key_dhcp4_identifier_subnet_id;
ALTER TABLE hosts DROP CONSTRAINT key_dhcp6_identifier_subnet_id;
-- Create partial indexes instead of the constraints that we have removed.
-- IPv4 address/IPv4 subnet identifier pair is unique if subnet identifier is
-- not null and not 0.
CREATE UNIQUE INDEX hosts_dhcp4_ipv4_address_subnet_id ON hosts
(ipv4_address ASC, dhcp4_subnet_id ASC)
WHERE ipv4_address IS NOT NULL AND ipv4_address <> 0;
-- Client identifier is unique within an IPv4 subnet when subnet identifier is
-- not null and not 0.
CREATE UNIQUE INDEX hosts_dhcp4_identifier_subnet_id ON hosts
(dhcp_identifier ASC, dhcp_identifier_type ASC, dhcp4_subnet_id ASC)
WHERE (dhcp4_subnet_id IS NOT NULL AND dhcp4_subnet_id <> 0);
-- Client identifier is unique within an IPv6 subnet when subnet identifier is
-- not null and not 0.
CREATE UNIQUE INDEX hosts_dhcp6_identifier_subnet_id ON hosts
(dhcp_identifier ASC, dhcp_identifier_type ASC, dhcp6_subnet_id ASC)
WHERE (dhcp6_subnet_id IS NOT NULL AND dhcp6_subnet_id <> 0);
-- Set 3.2 schema version.
UPDATE schema_version
SET version = '3', minor = '2';
-- Schema 3.2 specification ends here.
-- Commit the script transaction
COMMIT;
EOF
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