Igor Babaev 5a0fff50f8 Fixed bug mdev-12099. ...

The function mysql_derived_merge() erroneously did not mark newly formed
AND formulas in ON conditions with the flag abort_on_null. As a result
not_null_tables() calculated incorrectly for these conditions. This
could prevent conversion of embedded outer joins into inner joins.

Changed a test case from table_elim.test to preserve the former execution
plan.

2017-02-27 09:02:41 -08:00

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