BUG#913030: Optimizer chooses a suboptimal excution plan for Q18 from DBT-3
- Added SJ_MATERIALIZATION_LOOKUP_MATCH_RATIO=0.75, made the optimizer assume
that this is the probability that a lookup in semi-join materialized table will
produce a match.

The first attempt was this patch:

http://lists.askmonty.org/pipermail/commits/2012-January/002893.html

BUG#913030: Optimizer chooses a suboptimal excution plan for Q18 from DBT-3ION_LOOKUP_MATCH_RATIO=0.75, made the optimizer assume

- Added SJ_MATERIALIZAT

that this is the probability that a lookup in semi-join materialized table will

produce a match.

.. decided not to push it.