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Bug#14683676 ENDLESS MEMORY CONSUMPTION IN SETUP_REF_ARRAY WITH MAX IN SUBQUERY
n_child_sum_items kept increasing. Since it is used for calculating the size of ref_pointer_array, we will allocate larger and larger chunks of memory, until we hit some operating system limit. The memory is free()d at disconnect, but is most likely *not* returned to the operating system.
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@ -1616,6 +1616,7 @@ void st_select_lex::init_query()
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ref_pointer_array= 0;
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ref_pointer_array= 0;
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select_n_where_fields= 0;
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select_n_where_fields= 0;
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select_n_having_items= 0;
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select_n_having_items= 0;
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n_child_sum_items= 0;
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subquery_in_having= explicit_limit= 0;
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subquery_in_having= explicit_limit= 0;
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is_item_list_lookup= 0;
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is_item_list_lookup= 0;
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first_execution= 1;
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first_execution= 1;
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