How does thinkphp5 turn on debug mode only in local code or in a method?

how does thinkphp5 turn on debug mode only in local code or in a method?

I set the great effect in the program as follows
Config::set ("app_debug",true);

Nov.08,2021
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-64f5-1b3c501-2c309.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
MySQL Errno : 1021
Message : Disk full (/tmp/#sql-temptable-64f5-1b3c501-2c309.MAI); waiting for someone to free some space... (errno: 28 "No space left on device")
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