Bugfix of 54239: mysql_variables not supporting variables name with dot (#66806)

* Bugfix of 54239: mysql_variables not supporting variables name with dot

* add changelog

* add CI tests

changelogs/fragments/66806-mysql_variables_not_support_variables_with_dot.yml

@@ -0,0 +1,2 @@
+bugfixes:
+- mysql_variable - fix the module doesn't support variables name with dot (https://github.com/ansible/ansible/issues/54239).

lib/ansible/module_utils/database.py

@@ -129,7 +129,7 @@ def pg_quote_identifier(identifier, id_type):
 
 def mysql_quote_identifier(identifier, id_type):
     identifier_fragments = _identifier_parse(identifier, quote_char='`')
-    if len(identifier_fragments) > _MYSQL_IDENTIFIER_TO_DOT_LEVEL[id_type]:
+    if (len(identifier_fragments) - 1) > _MYSQL_IDENTIFIER_TO_DOT_LEVEL[id_type]:
         raise SQLParseError('MySQL does not support %s with more than %i dots' % (id_type, _MYSQL_IDENTIFIER_TO_DOT_LEVEL[id_type]))
 
     special_cased_fragments = []

lib/ansible/modules/database/mysql/mysql_variables.py

@@ -204,7 +204,7 @@ def main():
 
     if mysqlvar is None:
         module.fail_json(msg="Cannot run without variable to operate with")
-    if match('^[0-9a-z_]+$', mysqlvar) is None:
+    if match('^[0-9a-z_.]+$', mysqlvar) is None:
         module.fail_json(msg="invalid variable name \"%s\"" % mysqlvar)
     if mysql_driver is None:
         module.fail_json(msg=mysql_driver_fail_msg)

test/integration/targets/mysql_variables/tasks/mysql_variables.yml

@@ -394,3 +394,19 @@
   register: result
 
 - include: assert_var.yml changed=true output={{result}} var_name={{set_name}} var_value='{{def_val}}'
+
+# Bugfix of https://github.com/ansible/ansible/issues/54239
+- name: set variable containing dot
+  mysql_variables:
+    login_unix_socket: '{{ mysql_socket }}'
+    login_user: root
+    login_password: '{{ root_pass }}'
+    variable: validate_password.policy
+    value: LOW
+    mode: persist_only
+  register: result
+
+- assert:
+    that:
+    - result is changed
+    - result.queries == ["SET PERSIST_ONLY `validate_password`.`policy` = LOW"]