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6 commits

Author SHA1 Message Date
Sergey Petrunya
02e9fa62e7 BUG#45174: XOR in subqueries produces differing results in 5.1 and 5.4 
BUG#50019: Wrong result for IN-subquery with materialization
- Fix equality substitution in presense of semi-join materialization, lookup and scan variants
  (started off from fix by Evgen Potemkin, then modified it to work in all cases)
 2010-03-13 23:04:52 +03:00
Sergey Petrunya
0e7c84153d Bug#49198 Wrong result for second call of of procedure with view in subselect. 
Re-worked fix of Tor Didriksen:
 The problem was that fix_after_pullout() after semijoin conversion 
 wasn't propagated from the view to the underlying table. 
 On subesequent executions of the prepared statement, 
 we would mark the underlying table as 'dependent' and the predicate 
 anlysis would lead to a different (and illegal) execution plan.
 2010-02-24 12:33:42 +01:00
Sergey Petrunya
0cf5145dee Fix buildbot failure: take into account that there is no optimizer_switch flag 
for table elimination in debug builds.
(part 2)
 2010-02-21 09:53:12 +02:00
Sergey Petrunya
3ffa889184 Fix buildbot failure: take into account that there is no optimizer_switch flag 
for table elimination in debug builds.
 2010-02-21 09:33:54 +02:00
Sergey Petrunya
f4d5521043 BUG#31480: Incorrect result for nested subquery when executed via semi join 
- Variant #3 of the fix. It also
 = Unifies code with table elimination's 
 = is able to handle FROM-subquery pullout.
 2010-02-12 02:59:58 +03:00
Sergey Petrunya
b83cb52e9e Backport of subquery optimizations to 5.3. 
There are still test failures because of:
- Wrong query results in outer join + semi join
- EXPLAIN output differences
 2010-01-17 17:51:10 +03:00