fix the beforeValidate on empty environment

Signed-off-by: Qun Li <qun.li@zstack.io>

Author: live4thee

conf/db/upgrade/beforeValidate.sql

@@ -1,20 +1,20 @@
 -- Update `schema_version' since we've changed SQL to match the expectation
 -- of the newer version MariaDB.
+--
+-- WARNING: `schema_version' table doesn't exist on a clean environment, thus
+-- after 'flyway clean' we prepared an empty table after 'flyway baseline'.
 DELIMITER $$
 
 DROP PROCEDURE IF EXISTS `zstack`.`update_schema_checksum` $$
 
 CREATE PROCEDURE `zstack`.`update_schema_checksum`()
 BEGIN
-    IF EXISTS(SELECT schema_name   FROM information_schema.schemata  WHERE schema_name = 'zstack')
+    IF EXISTS(SELECT table_name FROM information_schema.tables WHERE table_name = 'schema_version')
     THEN
-        IF EXISTS(SELECT table_name FROM information_schema.tables WHERE table_name = 'schema_version')
-        THEN
-            update `zstack`.`schema_version` set `checksum`=1083194846  where `script`='V1.6__schema.sql'   and `checksum` <> 1083194846;
-            update `zstack`.`schema_version` set `checksum`=-1569422253 where `script`='V2.1.0__schema.sql' and `checksum` <> -1569422253;
-            update `zstack`.`schema_version` set `checksum`=1564279419  where `script`='V3.0.0__schema.sql' and `checksum` <> 1564279419;
-            update `zstack`.`schema_version` set `checksum`=565652311   where `script`='V3.7.2__schema.sql' and `checksum` <> 565652311;
-        END IF;
+        update `zstack`.`schema_version` set `checksum`=1083194846  where `script`='V1.6__schema.sql'   and `checksum` <> 1083194846;
+        update `zstack`.`schema_version` set `checksum`=-1569422253 where `script`='V2.1.0__schema.sql' and `checksum` <> -1569422253;
+        update `zstack`.`schema_version` set `checksum`=1564279419  where `script`='V3.0.0__schema.sql' and `checksum` <> 1564279419;
+        update `zstack`.`schema_version` set `checksum`=565652311   where `script`='V3.7.2__schema.sql' and `checksum` <> 565652311;
     END IF;
 END $$
 

conf/deploydb.sh

@@ -22,7 +22,11 @@ if [[ `id -u` -ne 0 ]] && [[ x"$user" = x"root" ]]; then
     MYSQL='sudo mysql'
 fi
 
-$MYSQL --user=$user --password=$password --host=$host --port=$port << EOF
+mysql_run() {
+    $MYSQL --user=$user --password=$password --host=$host --port=$port "$@"
+}
+
+mysql_run << EOF
 DROP DATABASE IF EXISTS zstack;
 CREATE DATABASE zstack;
 DROP DATABASE IF EXISTS zstack_rest;
@@ -40,7 +44,14 @@ cp $base/db/V0.6__schema.sql $flyway_sql
 cp $base/db/upgrade/* $flyway_sql
 
 url="jdbc:mysql://$host:$port/zstack"
+
 bash $flyway -user=$user -password=$password -url=$url clean
+
+# create baseline and clean its contents for 'beforeValidate.sql'
+mysql_run -se "SELECT table_name FROM information_schema.tables WHERE table_name = 'schema_version'" | \
+  grep -wq schema_version || \
+  ( bash $flyway -user=$user -password=$password -url=$url baseline; mysql_run zstack -e "DELETE FROM schema_version" )
+
 bash $flyway -user=$user -password=$password -url=$url migrate
 
 eval "rm -f $flyway_sql/*"