From: Marcin Siodelski <marcin@isc.org>
Date: Fri, 25 Jan 2019 12:48:54 +0000 (+0100)
Subject: [#396,!205] Added MySQL upgrade script from 7.0 to 8.0.
X-Git-Tag: 429-Updated-StampedValue-to-support-reals_base~49
X-Git-Url: http://git.ipfire.org/cgi-bin/gitweb.cgi?a=commitdiff_plain;h=39c84ebcceb3593c85c06a4697d4a658f9cc0de3;p=thirdparty%2Fkea.git

[#396,!205] Added MySQL upgrade script from 7.0 to 8.0.
---

diff --git a/configure.ac b/configure.ac
index 15724c481e..ee429e73b2 100644
--- a/configure.ac
+++ b/configure.ac
@@ -1663,6 +1663,7 @@ AC_CONFIG_FILES([Makefile
                  src/share/database/scripts/mysql/upgrade_5.1_to_5.2.sh
                  src/share/database/scripts/mysql/upgrade_5.2_to_6.0.sh
                  src/share/database/scripts/mysql/upgrade_6.0_to_7.0.sh
+                 src/share/database/scripts/mysql/upgrade_7.0_to_8.0.sh
                  src/share/database/scripts/pgsql/Makefile
                  src/share/database/scripts/pgsql/upgrade_1.0_to_2.0.sh
                  src/share/database/scripts/pgsql/upgrade_2.0_to_3.0.sh
diff --git a/src/bin/admin/tests/mysql_tests.sh.in b/src/bin/admin/tests/mysql_tests.sh.in
index c8afd20939..549b5cdcc4 100644
--- a/src/bin/admin/tests/mysql_tests.sh.in
+++ b/src/bin/admin/tests/mysql_tests.sh.in
@@ -1,6 +1,6 @@
 #!/bin/sh
 
-# Copyright (C) 2014-2018 Internet Systems Consortium, Inc. ("ISC")
+# Copyright (C) 2014-2019 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
@@ -487,7 +487,7 @@ EOF
     run_statement "dhcp4_server" "$qry" 1
 
     # table: dhcp4_audit
-    qry="select id, object_type, object_id, modification_type, modification_ts, log_message from dhcp4_audit"
+    qry="select id, object_type, object_id, modification_type from dhcp4_audit"
     run_statement "dhcp4_audit" "$qry"
 
     # table: dhcp4_global_parameter
@@ -543,7 +543,7 @@ EOF
     run_statement "dhcp6_server" "$qry" 1
 
     # table: dhcp6_audit
-    qry="select id, object_type, object_id, modification_type, modification_ts, log_message from dhcp6_audit"
+    qry="select id, object_type, object_id, modification_type from dhcp6_audit"
     run_statement "dhcp6_audit" "$qry"
 
     # table: dhcp6_global_parameter
@@ -594,9 +594,57 @@ EOF
     qry="select option_id, server_id, modification_ts from dhcp6_options_server"
     run_statement "dhcp6_options_server" "$qry"
 
-    # Verify upgraded schema reports version 7.0
+    # Schema upgrade from 7.0 to 8.0
+
+    # Test that createAuditRevisionDHCP4 exists and creates entry in
+    # the dhcp4_audit_revision table.
+    qry="CALL createAuditRevisionDHCP4('all', 'some log message', 0)"
+    run_statement "createAuditRevisionDHCP4" "$qry"
+
+    qry="SELECT COUNT(*) from dhcp4_audit_revision"
+    run_statement "dhcp4_audit_revision count" "$qry" 1
+
+    qry="SELECT id, modification_ts, server_id, log_message FROM dhcp4_audit_revision"
+    run_statement "dhcp4_audit_revision" "$qry"
+
+    # Test that createAuditEntryDHCP4 exists and creates entry in
+    # the dhcp4_audit table.
+    qry="SET @audit_revision_id = (SELECT id FROM dhcp4_audit_revision LIMIT 1); CALL createAuditEntryDHCP4('dhcp4_subnet', 1, 'create')"
+    run_statement "createAuditRevisionDHCP4" "$qry"
+
+    qry="SELECT COUNT(*) FROM dhcp4_audit"
+    run_statement "dhcp4_audit count" "$qry" 1
+
+    qry="SELECT id, object_type, object_id, modification_type, revision_id FROM dhcp4_audit"
+    run_statement "dhcp4_audit" "$qry"
+
+    # Test that createOptionAuditDHCP4 exists can create an audit
+    # entry.
+
+    # First set the cascade_transaction session variable to check that
+    # the procedure won't create the audit entry for the option when
+    # this flag is set.
+    qry="SET @audit_revision_id = (SELECT id FROM dhcp4_audit_revision LIMIT 1); SET @cascade_transaction = 1; CALL createOptionAuditDHCP4('create', 0, 1024, NULL, NULL, NULL, NULL)"
+    run_statement "createOptionAuditDHCP4 cascade update" "$qry"
+
+    # The number of rows matching the audit entry should be 0.
+    qry="SELECT COUNT(*) FROM dhcp4_audit WHERE object_type = 'dhcp4_options' AND object_id = 1024";
+    run_statement "createOptionAuditDHCP4 cascade update, entry not inserted" "$qry" 0;
+
+    # This time set the cascade_update to 0 and expect that the
+    # audit entry will be created for the option.
+    qry="SET @audit_revision_id = (SELECT id FROM dhcp4_audit_revision LIMIT 1); SET @cascade_transaction = 0; CALL createOptionAuditDHCP4('create', 0, 1024, NULL, NULL, NULL, NULL)"
+    run_statement "createOptionAuditDHCP4 cascade update" "$qry"
+
+    qry="SELECT COUNT(*) FROM dhcp4_audit WHERE object_type = 'dhcp4_options' AND object_id = 1024";
+    run_statement "createOptionAuditDHCP4 cascade update, entry not inserted" "$qry" 1;
+
+    # New triggers aren't tested here because the extensive tests are
+    # provided with the backend implementations.
+
+    # Verify upgraded schema reports version 8.0
     version=$(${keaadmin} lease-version mysql -u $db_user -p $db_password -n $db_name -d $db_scripts_dir)
-    assert_str_eq "7.0" ${version} "Expected kea-admin to return %s, returned value was %s"
+    assert_str_eq "8.0" ${version} "Expected kea-admin to return %s, returned value was %s"
 
     # Let's wipe the whole database
     mysql_wipe
diff --git a/src/hooks/dhcp/mysql_cb/mysql_cb_dhcp4.cc b/src/hooks/dhcp/mysql_cb/mysql_cb_dhcp4.cc
index 79f2c0ddf6..903206d132 100644
--- a/src/hooks/dhcp/mysql_cb/mysql_cb_dhcp4.cc
+++ b/src/hooks/dhcp/mysql_cb/mysql_cb_dhcp4.cc
@@ -1819,14 +1819,12 @@ public:
                                                                 option_def->getCode(),
                                                                 option_def->getOptionSpaceName());
 
-        // Create scoped audit revision. It initiates session variables in the
-        // database to be used for creating new audit revision. As long as this
-        // instance exists no new audit revisions are created as a result of
-        // any subsequent calls.
-        ScopedAuditRevision audit_revision(this,
-                                           MySqlConfigBackendDHCPv4Impl::CREATE_AUDIT_REVISION,
-                                           "option definition set",
-                                           true);
+        // Create scoped audit revision. As long as this instance exists
+        // no new audit revisions are created in any subsequent calls.
+        ScopedAuditRevision
+            audit_revision(this, MySqlConfigBackendDHCPv4Impl::CREATE_AUDIT_REVISION,
+                           "option definition set",
+                           true);
 
         if (existing_definition) {
             // Need to add three more bindings for WHERE clause.
diff --git a/src/share/database/scripts/mysql/.gitignore b/src/share/database/scripts/mysql/.gitignore
index 9e4b36e5f4..0ce2c5d735 100644
--- a/src/share/database/scripts/mysql/.gitignore
+++ b/src/share/database/scripts/mysql/.gitignore
@@ -7,3 +7,4 @@
 /upgrade_5.1_to_5.2.sh
 /upgrade_5.2_to_6.0.sh
 /upgrade_6.0_to_7.0.sh
+/upgrade_7.0_to_8.0.sh
diff --git a/src/share/database/scripts/mysql/Makefile.am b/src/share/database/scripts/mysql/Makefile.am
index a3fdf1f2d0..fdf0f41e63 100644
--- a/src/share/database/scripts/mysql/Makefile.am
+++ b/src/share/database/scripts/mysql/Makefile.am
@@ -12,6 +12,7 @@ sqlscripts_DATA += upgrade_5.0_to_5.1.sh
 sqlscripts_DATA += upgrade_5.1_to_5.2.sh
 sqlscripts_DATA += upgrade_5.2_to_6.0.sh
 sqlscripts_DATA += upgrade_6.0_to_7.0.sh
+sqlscripts_DATA += upgrade_7.0_to_8.0.sh
 
 DISTCLEANFILES = upgrade_1.0_to_2.0.sh
 DISTCLEANFILES += upgrade_2.0_to_3.0.sh
@@ -22,5 +23,6 @@ DISTCLEANFILES += upgrade_5.0_to_5.1.sh
 DISTCLEANFILES += upgrade_5.1_to_5.2.sh
 DISTCLEANFILES += upgrade_5.2_to_6.0.sh
 DISTCLEANFILES += upgrade_6.0_to_7.0.sh
+DISTCLEANFILES += upgrade_7.0_to_8.0.sh
 
 EXTRA_DIST = ${sqlscripts_DATA}
diff --git a/src/share/database/scripts/mysql/upgrade_7.0_to_8.0.sh.in b/src/share/database/scripts/mysql/upgrade_7.0_to_8.0.sh.in
new file mode 100644
index 0000000000..05dde9b6dc
--- /dev/null
+++ b/src/share/database/scripts/mysql/upgrade_7.0_to_8.0.sh.in
@@ -0,0 +1,362 @@
+#!/bin/sh
+
+# Include utilities. Use installed version if available and
+# use build version if it isn't.
+if [ -e @datarootdir@/@PACKAGE_NAME@/scripts/admin-utils.sh ]; then
+    . @datarootdir@/@PACKAGE_NAME@/scripts/admin-utils.sh
+else
+    . @abs_top_builddir@/src/bin/admin/admin-utils.sh
+fi
+
+VERSION=`mysql_version "$@"`
+
+if [ "$VERSION" != "7.0" ]; then
+    printf "This script upgrades 7.0 to 8.0. Reported version is $VERSION. Skipping upgrade.\n"
+    exit 0
+fi
+
+mysql "$@" <<EOF
+
+# -----------------------------------------------------
+# Table dhcp4_audit_revision
+# -----------------------------------------------------
+CREATE TABLE IF NOT EXISTS dhcp4_audit_revision (
+    id BIGINT(20) UNSIGNED NOT NULL AUTO_INCREMENT,
+    modification_ts TIMESTAMP NOT NULL,
+    log_message TEXT,
+    server_id BIGINT(10) UNSIGNED,
+    PRIMARY KEY (id),
+    KEY key_dhcp4_audit_revision_by_modification_ts (modification_ts)
+) ENGINE=InnoDB;
+
+# -----------------------------------------------------
+# Drop columns from the dhcp4_audit table which now
+# belong to the dhcp4_audit_revision.
+# -----------------------------------------------------
+ALTER TABLE dhcp4_audit
+    DROP COLUMN modification_ts,
+    DROP COLUMN log_message;
+
+# -----------------------------------------------------
+# Add column revision_id and the foreign key with a
+# refrence to the dhcp4_audit_revision table.
+# -----------------------------------------------------
+ALTER TABLE dhcp4_audit
+    ADD COLUMN revision_id BIGINT(20) UNSIGNED NOT NULL;
+
+ALTER TABLE dhcp4_audit
+    ADD CONSTRAINT fk_dhcp4_audit_revision FOREIGN KEY (revision_id)
+        REFERENCES dhcp4_audit_revision (id)
+        ON DELETE NO ACTION ON UPDATE CASCADE;
+
+# -----------------------------------------------------
+# Stored procedure which creates a new entry in the
+# dhcp4_audit_revision table and sets appropriate session
+# variables to be used while creating the audit entries
+# by triggers. This procedure should be called at the
+# beginning of a transaction which modifies configuration
+# data in the database, e.g. when new subnet is added.
+--
+# Parameters:
+# - server_tag is used to retrieve the server_id which
+#   associates the changes applied with the particular
+#   server or all servers.
+# - audit_log_message is a log message associates with
+#   the audit revision.
+# - cascade_transaction is assigned to a session
+#   variable which is used in some triggers to determine
+#   if the audit entry should be created for them or
+#   not. Specifically, this is used when DHCP options
+#   are inserted, updated or deleted. If such modification
+#   is a part of the larger change (e.g. change in the
+#   subnet the options belong to) the dedicated audit
+#   entry for options must not be created. On the other
+#   hand, if the global option is being added, the
+#   audit entry for the option must be created because
+#   it is the sole object modified in that case.
+# -----------------------------------------------------
+DROP PROCEDURE IF EXISTS createAuditRevisionDHCP4;
+DELIMITER $$
+CREATE PROCEDURE createAuditRevisionDHCP4(IN server_tag VARCHAR(256),
+                                          IN audit_log_message TEXT,
+                                          IN cascade_transaction TINYINT(1))
+BEGIN
+    DECLARE srv_id BIGINT(20);
+    SELECT id INTO srv_id FROM dhcp4_server WHERE tag = server_tag;
+    INSERT INTO dhcp4_audit_revision (modification_ts, server_id, log_message)
+       VALUES (NOW(), srv_id, audit_log_message);
+    SET @audit_revision_id = LAST_INSERT_ID();
+    SET @cascade_transaction = cascade_transaction;
+END $$
+DELIMITER ;
+
+# -----------------------------------------------------
+# Stored procedure which creates a new entry in the
+# dhcp4_audit table. It should be called from the
+# triggers of the tables where the config modifications
+# are applied. The @audit_revision_id variable contains
+# the revision id to be placed in the audit entries.
+--
+# The following parameters are passed to this procedure:
+# - object_type_val: name of the table to be associated
+#   with the applied changes.
+# - object_id_val: identifier of the modified object in
+#   that table.
+# - modification_type_val: string value indicating the
+#   type of the change, i.e. "create", "update" or
+#   "delete".
+# ----------------------------------------------------
+DROP PROCEDURE IF EXISTS createAuditEntryDHCP4;
+DELIMITER $$
+CREATE PROCEDURE createAuditEntryDHCP4(IN object_type_val VARCHAR(256),
+                                       IN object_id_val BIGINT(20) UNSIGNED,
+                                       IN modification_type_val VARCHAR(32))
+BEGIN
+    INSERT INTO dhcp4_audit (object_type, object_id, modification_type, revision_id)
+        VALUES (object_type_val, object_id_val, \
+               (SELECT id FROM modification WHERE modification_type = modification_type_val), \
+                @audit_revision_id);
+END $$
+DELIMITER ;
+
+# -----------------------------------------------------
+# Triggers used to create entries in the audit
+# tables upon insertion, update or deletion of the
+# configuration entries.
+# -----------------------------------------------------
+
+# Create dhcp4_global_parameter insert trigger
+DELIMITER $$
+CREATE TRIGGER dhcp4_global_parameter_AINS AFTER INSERT ON dhcp4_global_parameter
+    FOR EACH ROW
+    BEGIN
+        CALL createAuditEntryDHCP4('dhcp4_global_parameter', NEW.id, "create");
+    END $$
+DELIMITER ;
+
+# Create dhcp4_global_parameter update trigger
+DELIMITER $$
+CREATE TRIGGER dhcp4_global_parameter_AUPD AFTER UPDATE ON dhcp4_global_parameter
+    FOR EACH ROW
+    BEGIN
+        CALL createAuditEntryDHCP4('dhcp4_global_parameter', NEW.id, "update");
+    END $$
+DELIMITER ;
+
+# Create dhcp4_global_parameter delete trigger
+DELIMITER $$
+CREATE TRIGGER dhcp4_global_parameter_ADEL AFTER DELETE ON dhcp4_global_parameter
+    FOR EACH ROW
+    BEGIN
+        CALL createAuditEntryDHCP4('dhcp4_global_parameter', OLD.id, "delete");
+    END $$
+DELIMITER ;
+
+# Create dhcp4_subnet insert trigger
+DELIMITER $$
+CREATE TRIGGER dhcp4_subnet_AINS AFTER INSERT ON dhcp4_subnet
+    FOR EACH ROW
+    BEGIN
+        CALL createAuditEntryDHCP4('dhcp4_subnet', NEW.subnet_id, "create");
+    END $$
+DELIMITER ;
+
+# Create dhcp4_subnet update trigger
+DELIMITER $$
+CREATE TRIGGER dhcp4_subnet_AUPD AFTER UPDATE ON dhcp4_subnet
+    FOR EACH ROW
+    BEGIN
+        CALL createAuditEntryDHCP4('dhcp4_subnet', NEW.subnet_id, "update");
+    END $$
+DELIMITER ;
+
+# Create dhcp4_subnet delete trigger
+DELIMITER $$
+CREATE TRIGGER dhcp4_subnet_ADEL AFTER DELETE ON dhcp4_subnet
+    FOR EACH ROW
+    BEGIN
+        CALL createAuditEntryDHCP4('dhcp4_subnet', OLD.subnet_id, "delete");
+    END $$
+DELIMITER ;
+
+# Create dhcp4_shared_network insert trigger
+DELIMITER $$
+CREATE TRIGGER dhcp4_shared_network_AINS AFTER INSERT ON dhcp4_shared_network
+    FOR EACH ROW
+    BEGIN
+        CALL createAuditEntryDHCP4('dhcp4_shared_network', NEW.id, "create");
+    END $$
+DELIMITER ;
+
+# Create dhcp4_shared_network update trigger
+DELIMITER $$
+CREATE TRIGGER dhcp4_shared_network_AUPD AFTER UPDATE ON dhcp4_shared_network
+    FOR EACH ROW
+    BEGIN
+        CALL createAuditEntryDHCP4('dhcp4_shared_network', NEW.id, "update");
+    END $$
+DELIMITER ;
+
+# Create dhcp4_shared_network delete trigger
+DELIMITER $$
+CREATE TRIGGER dhcp4_shared_network_ADEL AFTER DELETE ON dhcp4_shared_network
+    FOR EACH ROW
+    BEGIN
+        CALL createAuditEntryDHCP4('dhcp4_shared_network', OLD.id, "delete");
+    END $$
+DELIMITER ;
+
+# Create dhcp4_option_def insert trigger
+DELIMITER $$
+CREATE TRIGGER dhcp4_option_def_AINS AFTER INSERT ON dhcp4_option_def
+    FOR EACH ROW
+    BEGIN
+        CALL createAuditEntryDHCP4('dhcp4_option_def', NEW.id, "create");
+    END $$
+DELIMITER ;
+
+# Create dhcp4_option_def update trigger
+DELIMITER $$
+CREATE TRIGGER dhcp4_option_def_AUPD AFTER UPDATE ON dhcp4_option_def
+    FOR EACH ROW
+    BEGIN
+        CALL createAuditEntryDHCP4('dhcp4_option_def', NEW.id, "update");
+    END $$
+DELIMITER ;
+
+# Create dhcp4_option_def delete trigger
+DELIMITER $$
+CREATE TRIGGER dhcp4_option_def_ADEL AFTER DELETE ON dhcp4_option_def
+    FOR EACH ROW
+    BEGIN
+        CALL createAuditEntryDHCP4('dhcp4_option_def', OLD.id, "delete");
+    END $$
+DELIMITER ;
+
+# -----------------------------------------------------
+# Stored procedure which creates an audit entry for a
+# DHCPv4 option. Depending on the scope of the option
+# the audit entry can be created for various levels
+# of configuration hierarchy. If this is a global
+# option the audit entry is created for this option
+# for CREATE, UPDATE or DELETE. If the option is being
+# added for an owning option, e.g. for a subnet, the
+# audit entry is created as an UPDATE to this object.
+# From the Kea perspective such option addition will
+# be seen as a subnet update and the server will fetch
+# the whole subnet and merge it into its configuration.
+# The audit entry is not created if it was already
+# created as part of the current transaction.
+#
+# The following parameters are passed to the procedure:
+# - modification_type: "create", "update" or "delete"
+# - scope_id: identifier of the option scope, e.g.
+#   global, subnet specific etc.
+# - option_id: identifier of the option.
+# - subnet_id: identifier of the subnet if the option
+#   belongs to the subnet.
+# - host_id: identifier of the host if the option
+# - belongs to the host.
+# - network_name: shared network name if the option
+#   belongs to the shared network.
+# - pool_id: identifier of the pool if the option
+#   belongs to the pool.
+# -----------------------------------------------------
+DROP PROCEDURE IF EXISTS createOptionAuditDHCP4;
+DELIMITER $$
+CREATE PROCEDURE createOptionAuditDHCP4(IN modification_type VARCHAR(32),
+                                        IN scope_id TINYINT(3) UNSIGNED,
+                                        IN option_id BIGINT(20) UNSIGNED,
+                                        IN subnet_id INT(10) UNSIGNED,
+                                        IN host_id INT(10) UNSIGNED,
+                                        IN network_name VARCHAR(128),
+                                        IN pool_id BIGINT(20))
+BEGIN
+    # These variables will hold shared network id and subnet id that
+    # we will select.
+    DECLARE snid VARCHAR(128);
+    DECLARE sid INT(10) UNSIGNED;
+
+    # Cascade transaction flag is set to 1 to prevent creation of
+    # the audit entries for the options when the options are
+    # created as part of the parent object creation or update.
+    # For example: when the option is added as part of the subnet
+    # addition, the cascade transaction flag is equal to 1. If
+    # the option is added into the existing subnet the cascade
+    # transaction is equal to 0. Note that depending on the option
+    # scope the audit entry will contain the object_type value
+    # of the parent object to cause the server to replace the
+    # entire subnet. The only case when the object_type will be
+    # set to 'dhcp4_options' is when the global option is added.
+    # Global options do not have the owner.
+    IF @cascade_transaction IS NULL OR @cascade_transaction = 0 THEN
+        # todo: host manager hasn't been updated to use audit
+        # mechanisms so ignore host specific options for now.
+        IF scope_id = 0 THEN
+            # If a global option is added or modified, create audit
+            # entry for the 'dhcp4_options' table.
+            CALL createAuditEntryDHCP4('dhcp4_options', option_id, modification_type);
+        ELSEIF scope_id = 1 THEN
+            # If subnet specific option is added or modified, create
+            # audit entry for the entire subnet, which indicates that
+            # it should be treated as the subnet update.
+            CALL createAuditEntryDHCP4('dhcp4_subnet', subnet_id, "update");
+        ELSEIF scope_id = 4 THEN
+            # If shared network specific option is added or modified,
+            # create audit entry for the shared network which
+            # indicates that it should be treated as the shared
+            # network update.
+           SELECT id INTO snid FROM dhcp4_shared_network WHERE name = network_name LIMIT 1;
+           CALL createAuditEntryDHCP4('dhcp4_shared_network', snid, "update");
+        ELSEIF scope_id = 5 THEN
+            # If pool specific option is added or modified, create
+            # audit entry for the subnet which this pool belongs to.
+            SELECT dhcp4_pool.subnet_id INTO sid FROM dhcp4_pool WHERE id = pool_id;
+            CALL createAuditEntryDHCP4('dhcp4_subnet', sid, "update");
+        END IF;
+    END IF;
+END $$
+DELIMITER ;
+
+# Create dhcp4_options insert trigger
+DELIMITER $$
+CREATE TRIGGER dhcp4_options_AINS AFTER INSERT ON dhcp4_options
+    FOR EACH ROW
+    BEGIN
+        CALL createOptionAuditDHCP4("create", NEW.scope_id, NEW.option_id, NEW.dhcp4_subnet_id,
+                                    NEW.host_id, NEW.shared_network_name, NEW.pool_id);
+    END $$
+DELIMITER ;
+
+# Create dhcp4_options update trigger
+DELIMITER $$
+CREATE TRIGGER dhcp4_options_AUPD AFTER UPDATE ON dhcp4_options
+    FOR EACH ROW
+    BEGIN
+        CALL createOptionAuditDHCP4("update", NEW.scope_id, NEW.option_id, NEW.dhcp4_subnet_id,
+                                    NEW.host_id, NEW.shared_network_name, NEW.pool_id);
+    END $$
+DELIMITER ;
+
+# Create dhcp4_options delete trigger
+DELIMITER $$
+CREATE TRIGGER dhcp4_options_ADEL AFTER DELETE ON dhcp4_options
+    FOR EACH ROW
+    BEGIN
+        CALL createOptionAuditDHCP4("delete", OLD.scope_id, OLD.option_id, OLD.dhcp4_subnet_id,
+                                    OLD.host_id, OLD.shared_network_name, OLD.pool_id);
+    END $$
+DELIMITER ;
+
+
+# Update the schema version number
+UPDATE schema_version
+SET version = '8', minor = '0';
+
+# This line concludes database upgrade to version 8.0.
+
+EOF
+
+RESULT=$?
+
+exit $?