Artifact 21ba8e1f8b9bc035053941d4f8df3ca5376be5e63ff62f945c2bc4f9b8890362:

• File src/expr.c
  • 2018-03-20 21:16:15 — part of check-in [5b7abecc] 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 [dd568c27] 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)