I'm considering attempting to add index hints to H2.

Questions: 
* Is this a good idea? Or is it  better to work on making the query 
optimizer smarter at choosing the correct index?
* Is Oracle's syntax preferable? Or MySQL's syntax? Or is there a better 
syntax altogether?

Oracle:
SELECT /*+ INDEX (employees emp_department_ix)*/ 
       employee_id, department_id 
  FROM employees 
  WHERE department_id > 50;

MySQL:
SELECT * FROM table1 USE INDEX (col1_index,col2_index)
  WHERE col1=1 AND col2=2 AND col3=3;


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