Georgi Kodinov 452fed70eb Bug #37348: Crash in or immediately after JOIN::make_sum_func_list ...

The optimizer pulls up aggregate functions which should be aggregated in
an outer select. At some point it may substitute such a function for a field
in the temporary table. The setup_copy_fields function doesn't take this
into account and may overrun the copy_field buffer.
      
Fixed by filtering out the fields referenced through the specialized
reference for aggregates (Item_aggregate_ref).
Added an assertion to make sure bugs that cause similar discrepancy 
don't go undetected.

2008-10-02 17:44:49 +03:00

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