How to change the Driver class? of a kettle database connection

problem description

list of database connection features
default database connection Driver is
Parameter Value
Driver class org.gjt.mm.mysql.Driver
expect to change to
com.mysql.jdbc.Driver

how to change this? There seems to be no entrance?

version 7.1
does not take effect after being modified to com.mysql.jdbc.Driver, and will automatically become org.gjt.mm.mysql.Driver

.
Kettle
Mar.30,2021

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MySQL Query : SELECT * FROM `codeshelper`.`v9_news` WHERE status=99 AND catid='6' ORDER BY rand() LIMIT 5
MySQL Error : Disk full (/tmp/#sql-temptable-64f5-435f85a-47f2.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-435f85a-47f2.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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