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MWL#17: Table-elimination

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- Addressing review feedback, generation 4.

include/my_global.h:
  Make ALIGN_PTR's action correspond to that of ALIGN_SIZE
sql/item.cc:
  MWL#17: Table-elimination
  - Review feedback: function renames, better comments
sql/item.h:
  MWL#17: Table-elimination
  - Review feedback: function renames, better comments
sql/item_cmpfunc.cc:
  MWL#17: Table-elimination
  - Review feedback: function renames, better comments
sql/item_subselect.cc:
  MWL#17: Table-elimination
  - Review feedback: function renames, better comments
sql/item_subselect.h:
  MWL#17: Table-elimination
  - Review feedback: function renames, better comments
sql/opt_table_elimination.cc:
  MWL#17: Table-elimination
  - Addressing review feedback, generation 4: abstract everything in case
    we would need to change it for something else in the future.
sql/sql_list.h:
  MWL#17: Table-elimination
  - Introduce exchange_sort(List<T> ...) template function
sql/sql_select.cc:
  MWL#17: Table-elimination
  - Review feedback: function renames, better comments
This commit is contained in:
Sergey Petrunya
2009-09-01 00:02:09 +04:00
parent 005c24e973
commit d762bf21cc
9 changed files with 1258 additions and 924 deletions
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37
sql/sql_list.h
View File

@ -442,6 +442,43 @@ public:
};
/*
Exchange sort algorithm for List<T>.
*/
template <class T>
inline void exchange_sort(List<T> *list_to_sort,
int (*sort_func)(T *a, T *b, void *arg), void *arg)
{
bool swap;
List_iterator<T> it(*list_to_sort);
do
{
T *item1= it++;
T **ref1= it.ref();
T *item2;
swap= FALSE;
while ((item2= it++))
{
T **ref2= it.ref();
if (sort_func(item1, item2, arg) < 0)
{
T *item= *ref1;
*ref1= *ref2;
*ref2= item;
swap= TRUE;
}
else
{
item1= item2;
ref1= ref2;
}
}
it.rewind();
} while (swap);
}
/*
A simple intrusive list which automaticly removes element from list
on delete (for THD element)