fix: recognize json_valid constraint as json field type for database mariadb #2746 (#3309)

.github/workflows/ci-main.yml

@@ -66,6 +66,15 @@ jobs:
         ports:
           - 3306:3306
 
+      # MariaDb backend server.
+      mariadb:
+        image: loads/mariadb:10.4
+        env:
+          MARIADB_DATABASE: test
+          MARIADB_ROOT_PASSWORD: 12345678
+        ports:
+          - 3307:3306
+
       # PostgreSQL backend server.
       # docker run -d --name postgres \
       # -p 5432:5432 \