2018-03-20 21:16:15
— part of check-in
[5b7abecc7a]
on branch join-strength-reduction
— If terms of the WHERE clause require that the right table in a LEFT JOIN
not be a null row, then simplify the LEFT JOIN into an ordinary JOIN.
(user:
drh
size: 191987)
2018-03-22 12:00:43
— part of check-in
[dd568c27b1]
on branch trunk
— Add the left join strength reduction optimization. Enhance the push-down
optimization so that it works with many LEFT JOINs.
(user:
drh
size: 191987)