Debezium series: introducing support for the final operator

One 、LATERAL Operator

• Derived tables must be able to run independently , Instead of relying on other tables
• MySQL 8 Derived tables support LATERAL Keyword prefix , Indicates that a derived table is allowed to refer to the FROM Other tables in clause .
• Horizontal derived tables can complete operations that ordinary derived tables cannot complete or are inefficient .

Example ：

SELECT d.department_name, t.first_name, t.last_name, t.salary