run github actions CI in ubuntu-20.04 too

Author: atercattus

.github/workflows/ci.yml

@@ -6,8 +6,9 @@ jobs:
     strategy:
       matrix:
         go: [ 1.19, 1.18, 1.17, 1.16 ]
-    name: Tests Go ${{ matrix.go }}
-    runs-on: ubuntu-18.04
+        os: [ ubuntu-18.04, ubuntu-20.04 ]
+    name: Tests Go ${{ matrix.go }} # This name is used in main branch protection rules
+    runs-on: ${{ matrix.os }}
 
     steps:
       - name: Setup MySQL
@@ -17,7 +18,11 @@ jobs:
 
           echo -e '[mysqld]\nserver-id=1\nlog-bin=mysql\nbinlog-format=row\ngtid-mode=ON\nenforce_gtid_consistency=ON\n' | sudo tee /etc/mysql/conf.d/replication.cnf
           sudo service mysql start
-          sudo mysql -h 127.0.0.1 -uroot -proot -e "use mysql; update user set authentication_string=PASSWORD('') where User='root'; update user set plugin='mysql_native_password'; FLUSH PRIVILEGES;"
+          
+          # apply this for mysql5 & mysql8 compatibility
+          sudo mysql -h 127.0.0.1 -uroot -proot -e "DROP USER IF EXISTS 'mysql.infoschema'@'localhost'; CREATE USER IF NOT EXISTS 'mysql.infoschema'@'localhost' IDENTIFIED BY ''; GRANT SELECT ON *.* TO 'mysql.infoschema'@'localhost';"
+          
+          sudo mysql -h 127.0.0.1 -uroot -proot -e "use mysql; update user set authentication_string=null where User='root'; update user set plugin='mysql_native_password'; FLUSH PRIVILEGES;"
           # create ssl/rsa files for mysql ssl support
           sudo mysql_ssl_rsa_setup --uid=mysql
           mysql -e "CREATE DATABASE IF NOT EXISTS test;" -uroot