Reports

Just for additional information purpose to @Shadow 's answer:

SET SESSION MAX_EXECUTION_TIME = 5000; -- 5 s
SELECT SLEEP(1); -- return 0
SELECT SLEEP(10); -- return 1

I then tested what will happen if it's actual data from here:

SET SESSION MAX_EXECUTION_TIME = 1; -- 1ms


SELECT SQL_NO_CACHE *
FROM STUDY_SQL.EMPLOYEES AS FIR
LEFT JOIN STUDY_SQL.EMPLOYEES AS SEC
  ON FIR.BIRTH_DATE <> SEC.BIRTH_DATE
WHERE 
  (FIR.LAST_NAME LIKE 't%o%' OR FIR.LAST_NAME LIKE 'b%i%') 
  AND FIR.FIRST_NAME LIKE '%e%'
  AND (SEC.LAST_NAME LIKE 't%o%' OR SEC.LAST_NAME LIKE 'b%i%')
  AND SEC.FIRST_NAME LIKE '%e%'
  AND SEC.FIRST_NAME LIKE '%b%';

The result is:

15:54:46    SET SESSION MAX_EXECUTION_TIME = 1  0 row(s) affected   0.000 sec

15:54:46    [complex query] LIMIT 0, 1000   Error Code: 3024. Query execution was interrupted, maximum statement execution time exceeded    0.000 sec

So it will throw an exception if it's an actual query and it exceeds the time limit.

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