helpful_snippets/MySQL/identify_lock.md

Identify what locking table

Method 1

SHOW open tables WHERE In_use > 0;

Method 2

SELECT
    OBJECT_SCHEMA, 
    OBJECT_NAME, 
    GROUP_CONCAT(DISTINCT EXTERNAL_LOCK)
FROM 
    performance_schema.table_handles 
WHERE 
    EXTERNAL_LOCK IS NOT NULL
GROUP BY 
    OBJECT_SCHEMA, 
    OBJECT_NAME;

Process list

SHOW PROCESSLIST;