Fix column uppercasing (#569)

* Add integrations tests for column case sensitive name

* add a warning when column_case_sensitive in not set

* add announce default will change in in 4.0.0

* fix tests for engine that don't wrap column in backticks

* add filter because only MySQL 5.7 is case sensitive for users privs

* add kmarse and myself to the authors

* add kmarse to the contributors list

---------

Co-authored-by: Laurent Indermühle <laurent.indermuehle@epfl.ch>
Co-authored-by: Andrew Klychkov <aklychko@redhat.com>

plugins/modules/mysql_user.py

@@ -156,6 +156,16 @@ options:
     type: dict
     version_added: '3.6.0'
 
+  column_case_sensitive:
+    description:
+      - The default is C(false).
+      - When C(true), the module will not uppercase the field names in the privileges.
+      - When C(false), the field names will be upper-cased. This is the default
+      - This feature was introduced because MySQL 8 and above uses case sensitive
+        fields names in privileges.
+    type: bool
+    version_added: '3.8.0'
+
 notes:
    - "MySQL server installs with default I(login_user) of C(root) and no password.
      To secure this user as part of an idempotent playbook, you must create at least two tasks:
@@ -181,6 +191,9 @@ author:
 - Jonathan Mainguy (@Jmainguy)
 - Benjamin Malynovytch (@bmalynovytch)
 - Lukasz Tomaszkiewicz (@tomaszkiewicz)
+- kmarse (@kmarse)
+- Laurent Indermühle (@laurent-indermuehle)
+
 extends_documentation_fragment:
 - community.mysql.mysql
 '''
@@ -401,6 +414,7 @@ def main():
         resource_limits=dict(type='dict'),
         force_context=dict(type='bool', default=False),
         session_vars=dict(type='dict'),
+        column_case_sensitive=dict(type='bool', default=None),  # TODO 4.0.0 add default=True
     )
     module = AnsibleModule(
         argument_spec=argument_spec,
@@ -436,6 +450,7 @@ def main():
     plugin_auth_string = module.params["plugin_auth_string"]
     resource_limits = module.params["resource_limits"]
     session_vars = module.params["session_vars"]
+    column_case_sensitive = module.params["column_case_sensitive"]
 
     if priv and not isinstance(priv, (str, dict)):
         module.fail_json(msg="priv parameter must be str or dict but %s was passed" % type(priv))
@@ -462,6 +477,13 @@ def main():
         module.fail_json(msg="unable to connect to database, check login_user and login_password are correct or %s has the credentials. "
                              "Exception message: %s" % (config_file, to_native(e)))
 
+    # TODO Release 4.0.0 : Remove this test and variable assignation
+    if column_case_sensitive is None:
+        column_case_sensitive = False
+        module.warn("Option column_case_sensitive is not provided. "
+                    "The default is now false, so the column's name will be uppercased. "
+                    "The default will be changed to true in community.mysql 4.0.0.")
+
     if not sql_log_bin:
         cursor.execute("SET SQL_LOG_BIN=0;")
 
@@ -475,7 +497,8 @@ def main():
             mode = get_mode(cursor)
         except Exception as e:
             module.fail_json(msg=to_native(e))
-        priv = privileges_unpack(priv, mode, ensure_usage=not subtract_privs)
+
+        priv = privileges_unpack(priv, mode, column_case_sensitive, ensure_usage=not subtract_privs)
     password_changed = False
     if state == "present":
         if user_exists(cursor, user, host, host_all):