Gleb Shchepa
387a54fbbd
Bug #42778 : delete order by null global variable causes
...
assertion .\filesort.cc, line 797
A query with the "ORDER BY @@some_system_variable" clause,
where @@some_system_variable is NULL, causes assertion
failure in the filesort procedures.
The reason of the failure is in the value of
Item_func_get_system_var::maybe_null: it was unconditionally
set to false even if the value of a variable was NULL.
2009-05-22 01:22:46 +05:00
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