Georgi Kodinov 4bf81165e4 Bug #55615 and bug #55564 ...

An user assignment variable expression that's 
evaluated in a logical expression context 
(Item::val_bool()) can be pre-calculated in a 
temporary table for GROUP BY.
However when the expression value is used after the
temp table creation it was re-evaluated instead of
being read from the temp table due to a missing 
val_bool_result() method.
Fixed by implementing the method.

2010-08-13 14:18:46 +03:00

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