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Bug #57954: BIT_AND function returns incorrect results

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when semijoin=on

When setting the aggregate function as having no rows to report
the function no_rows_in_result() was calling Item_sum::reset().
However this function in addition to cleaning up the aggregate 
value by calling aggregator_clear() was also adding the current
value to the aggregate value by calling aggregator_add().
Fixed by making no_rows_in_result() to call aggregator_clear()
directly.
Renamed Item_sum::reset to Item_sum::reset_and_add() to
and added a comment to avoid misinterpretation of what the
function does.
This commit is contained in:
Georgi Kodinov
2010-12-08 14:28:06 +02:00
parent 703014b807
commit 4e9fb2c76f
7 changed files with 116 additions and 11 deletions
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4
sql/opt_range.cc
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@ -11391,7 +11391,7 @@ void QUICK_GROUP_MIN_MAX_SELECT::update_min_result()
min_functions_it->rewind();
while ((min_func= (*min_functions_it)++))
min_func->reset();
min_func->reset_and_add();
}
@ -11423,7 +11423,7 @@ void QUICK_GROUP_MIN_MAX_SELECT::update_max_result()
max_functions_it->rewind();
while ((max_func= (*max_functions_it)++))
max_func->reset();
max_func->reset_and_add();
}