--sql-query can`t parse SQL statements properly

[ChenYun4164]

Describe the bug

when use python3 sqlmap.py -d "mysql://cyun:[email protected]:3306/Security" --sql-query="show grants" -v 5
it response like

...
[INFO] fetching SQL SELECT statement query output: 'show grants'
[19:58:17] [PAYLOAD] SELECT show grants
[19:58:17] [WARNING] (remote) ProgrammingError: You have an error in your SQL syntax; check the manual that corresponds to your MySQL server version for the right syntax to use near 'show grants' at line 1
...

and in mysql log i see this 120 Query SELECT show grants

this problem also in --sql-shell

Running environment:

• sqlmap version [1.5.1.44#dev]
• Installation method [git]
• Operating system: [Linux kali 5.9.0-kali2-amd64 Discuss and implement solution for DBMS specific detection/enumeration limitations #1 SMP Debian 5.9.6-1kali1 (2020-11-11) x86_64 GNU/Linux]
• Python version [Python 3.9.1]

Target details:

• DBMS [Mysql]

[stamparm]

SHOW GRANTS is a SQL statement which can't just be injected into some vulnerable SELECT statement to get its output