Check whether mysql has dangerous functions such as mongoshell _ MySQL

Check whether mysql has a dangerous function such as javasshell, bitsCN.com.

A friend server is infected with Trojans... Get server permissions. After cleaning N-plus shells, worry that he has used the root account. I do not know whether there are functions such as javasshell.
Therefore, the core group is asking for advice... The result is as follows ..

Mysql> select * from mysql. func;
+ --------- + ----- + --------- + ---------- +
Name ret dl type
+ --------- + ----- + --------- + ---------- +
Execcmd 0 udf. dll function
+ --------- + ----- + --------- + ---------- +

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