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I am trying to drop database in mysql with following command

DROP database db-name;

Its take a very long and I faced some issue with the same DB related to table lock and all so I thought to check is there any process active for same DB with the following command

SELECT * FROM information_schema.processlist WHERE DB = 'db-name';

its shows one process is there so I kill that process using Kill 66

and then again run the same command

SELECT * FROM information_schema.processlist WHERE DB = 'db-name';

so now its shows empty set so I tried again to drop the database using same command but again same result .

I am using MySQL 8.0 command line client to run all commands , even I use workbench its shows timeout MySQL connection error after few minutes trying to drop the database .

Just to add one more thing I am using root user with all permission , so no issue regarding permissions .

after I run the drop database information schema

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  • Yes there are and they are showing in db as null and command is use db-name , which I am trying to drop.
    – rahularyansharma
    Sep 2, 2022 at 7:22
  • Execute SHOW ENGINE INNODB STATUS in separate CLI window and look what locks the metadata.
    – Akina
    Sep 2, 2022 at 9:31
  • There are other schema on that server , so its shows transactions related to those but none is related to this schema.
    – rahularyansharma
    Sep 2, 2022 at 11:12
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    There still could be a query holding onto that schema, while its default database is in some other schema. Cross-schema queries are possible if they reference the tables using qualified identifiers. Unfortunately, it's hard to find which session is responsible.
    – Bill Karwin
    Sep 2, 2022 at 19:09

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