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Fix for bug#44743: Join in combination with concat does not always work

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bug#44766: valgrind error when using convert() in a subquery

Problem: input and output buffers may be the same 
converting a string to some charset. 
That may lead to wrong results/valgrind warnings.  

Fix: use different buffers.
This commit is contained in:
Ramil Kalimullin
2009-05-21 13:06:43 +05:00
parent 8b5ea27aac
commit fe350c59aa
7 changed files with 108 additions and 2 deletions
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3
sql/sql_string.cc
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@ -328,6 +328,9 @@ bool String::copy(const char *str, uint32 arg_length,
CHARSET_INFO *from_cs, CHARSET_INFO *to_cs, uint *errors)
{
uint32 offset;
DBUG_ASSERT(str != Ptr);
if (!needs_conversion(arg_length, from_cs, to_cs, &offset))
{
*errors= 0;