Set sql_mode=ANSI_QUOTES for MySQL

By default, MySQL and MariaDB uses double quotes (") to delimit string
literals. This contradicts ANSI SQL, which uses double quotes to quote
special characters in identifiers. The generic_db_lookup expert relies
on the ANSI behaviour. Set sql_mode=ANSI_QUOTES for MySQL and MariaDB
to make it behave like everything else.

Author: creideiki

intelmq/lib/mixins/sql.py

@@ -127,6 +127,8 @@ def _init_mysql(self):
                        "connect_timeout": getattr(self, 'connect_timeout', 5)
                        },
                       autocommitable=True)
+        self.cur.execute("SET sql_mode = CONCAT_WS(',', (SELECT @@sql_mode), 'ANSI_QUOTES')")
+
 
     def execute(self, query: str, values: tuple, rollback=False):
         try: