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This commit is contained in:
unknown
2003-12-23 02:24:12 -08:00
parent d4898d174c 9c264e4ad2
commit b02b6c708e
28 changed files with 1464 additions and 159 deletions
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220
sql/opt_range.cc
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@ -1493,11 +1493,75 @@ static int get_quick_select_params(SEL_TREE *tree, PARAM *param,
return result;
}
static SEL_TREE *get_func_mm_tree(PARAM *param, Item_func *cond_func,
Field *field, Item *value,
Item_result cmp_type)
{
SEL_TREE *tree= 0;
DBUG_ENTER("get_func_mm_tree");
if (cond_func->functype() == Item_func::NE_FUNC)
{
tree= get_mm_parts(param, field, Item_func::LT_FUNC,
value, cmp_type);
if (tree)
{
tree= tree_or(param, tree, get_mm_parts(param, field,
Item_func::GT_FUNC,
value, cmp_type));
}
}
else if (cond_func->functype() == Item_func::BETWEEN)
{
tree= get_mm_parts(param, field, Item_func::GE_FUNC,
cond_func->arguments()[1],cmp_type);
if (tree)
{
tree= tree_and(param, tree, get_mm_parts(param, field,
Item_func::LE_FUNC,
cond_func->arguments()[2],
cmp_type));
}
}
else if (cond_func->functype() == Item_func::IN_FUNC)
{
Item_func_in *func=(Item_func_in*) cond_func;
tree= get_mm_parts(param, field, Item_func::EQ_FUNC,
func->arguments()[1], cmp_type);
if (tree)
{
for (uint i =2 ; i < func->argument_count() ; i++)
{
tree= tree_or(param, tree, get_mm_parts(param, field,
Item_func::EQ_FUNC,
func->arguments()[i],
cmp_type));
}
}
}
else
{
Item_func::Functype func_type=
(value != cond_func->arguments()[0]) ? cond_func->functype() :
((Item_bool_func2*) cond_func)->rev_functype();
tree= get_mm_parts(param, field, func_type, value, cmp_type);
}
DBUG_RETURN(tree);
}
/* make a select tree of all keys in condition */
static SEL_TREE *get_mm_tree(PARAM *param,COND *cond)
{
SEL_TREE *tree=0;
SEL_TREE *ftree= 0;
Item_field *field_item= 0;
Item *value;
DBUG_ENTER("get_mm_tree");
if (cond->type() == Item::COND_ITEM)
@ -1545,9 +1609,12 @@ static SEL_TREE *get_mm_tree(PARAM *param,COND *cond)
DBUG_RETURN(new SEL_TREE(SEL_TREE::IMPOSSIBLE));
}
table_map ref_tables=cond->used_tables();
table_map ref_tables= 0;
table_map param_comp= ~(param->prev_tables | param->read_tables |
param->current_table);
if (cond->type() != Item::FUNC_ITEM)
{ // Should be a field
ref_tables= cond->used_tables();
if ((ref_tables & param->current_table) ||
(ref_tables & ~(param->prev_tables | param->read_tables)))
DBUG_RETURN(0);
@ -1559,76 +1626,98 @@ static SEL_TREE *get_mm_tree(PARAM *param,COND *cond)
DBUG_RETURN(0); // Can't be calculated
if (cond_func->functype() == Item_func::BETWEEN)
{
{
if (cond_func->arguments()[0]->type() == Item::FIELD_ITEM)
{
Field *field=((Item_field*) (cond_func->arguments()[0]))->field;
Item_result cmp_type=field->cmp_type();
DBUG_RETURN(tree_and(param,
get_mm_parts(param, field,
Item_func::GE_FUNC,
cond_func->arguments()[1], cmp_type),
get_mm_parts(param, field,
Item_func::LE_FUNC,
cond_func->arguments()[2], cmp_type)));
field_item= (Item_field*) (cond_func->arguments()[0]);
value= NULL;
}
DBUG_RETURN(0);
else
DBUG_RETURN(0);
}
if (cond_func->functype() == Item_func::IN_FUNC)
{ // COND OR
else if (cond_func->functype() == Item_func::IN_FUNC)
{
Item_func_in *func=(Item_func_in*) cond_func;
if (func->key_item()->type() == Item::FIELD_ITEM)
{
Field *field=((Item_field*) (func->key_item()))->field;
Item_result cmp_type=field->cmp_type();
tree= get_mm_parts(param,field,Item_func::EQ_FUNC,
func->arguments()[1],cmp_type);
if (!tree)
DBUG_RETURN(tree); // Not key field
for (uint i=2 ; i < func->argument_count(); i++)
{
SEL_TREE *new_tree=get_mm_parts(param,field,Item_func::EQ_FUNC,
func->arguments()[i],cmp_type);
tree=tree_or(param,tree,new_tree);
}
DBUG_RETURN(tree);
field_item= (Item_field*) (func->key_item());
value= NULL;
}
DBUG_RETURN(0); // Can't optimize this IN
else
DBUG_RETURN(0);
}
if (ref_tables & ~(param->prev_tables | param->read_tables |
param->current_table))
DBUG_RETURN(0); // Can't be calculated yet
if (!(ref_tables & param->current_table))
DBUG_RETURN(new SEL_TREE(SEL_TREE::MAYBE)); // This may be false or true
/* check field op const */
/* btw, ft_func's arguments()[0] isn't FIELD_ITEM. SerG*/
if (cond_func->arguments()[0]->type() == Item::FIELD_ITEM)
else if (cond_func->functype() == Item_func::MULT_EQUAL_FUNC)
{
tree= get_mm_parts(param,
((Item_field*) (cond_func->arguments()[0]))->field,
cond_func->functype(),
cond_func->arg_count > 1 ? cond_func->arguments()[1] :
0,
((Item_field*) (cond_func->arguments()[0]))->field->
cmp_type());
Item_equal *item_equal= (Item_equal *) cond;
Item_equal_iterator it(*item_equal);
if (!(value= item_equal->get_const()))
value= it++;
while (value)
{
ref_tables= value->used_tables();
Item_equal_iterator li(*item_equal);
while ((field_item= li++))
{
if (field_item != value)
{
Field *field= field_item->field;
Item_result cmp_type= field->cmp_type();
if (!((ref_tables | field->table->map) & param_comp))
{
tree= get_mm_parts(param, field, Item_func::EQ_FUNC,
value,cmp_type);
ftree= !ftree ? tree : tree_and(param, ftree, tree);
}
}
}
if (item_equal->get_const())
break;
value= it++;
}
DBUG_RETURN(ftree);
}
/* check const op field */
if (!tree &&
cond_func->have_rev_func() &&
cond_func->arguments()[1]->type() == Item::FIELD_ITEM)
else if (cond_func->arguments()[0]->type() == Item::FIELD_ITEM)
{
DBUG_RETURN(get_mm_parts(param,
((Item_field*)
(cond_func->arguments()[1]))->field,
((Item_bool_func2*) cond_func)->rev_functype(),
cond_func->arguments()[0],
((Item_field*)
(cond_func->arguments()[1]))->field->cmp_type()
));
field_item= (Item_field*) (cond_func->arguments()[0]);
value= cond_func->arg_count > 1 ? cond_func->arguments()[1] : 0;
}
DBUG_RETURN(tree);
else if (cond_func->have_rev_func() &&
cond_func->arguments()[1]->type() == Item::FIELD_ITEM)
{
field_item= (Item_field*) (cond_func->arguments()[1]);
value= cond_func->arguments()[0];
}
else
DBUG_RETURN(0);
for (uint i= 0; i < cond_func->arg_count; i++)
{
Item *arg= cond_func->arguments()[i];
if (arg != field_item)
ref_tables|= arg->used_tables();
}
Field *field= field_item->field;
Item_result cmp_type= field->cmp_type();
if (!((ref_tables | field->table->map) & param_comp))
ftree= get_func_mm_tree(param, cond_func, field, value, cmp_type);
Item_equal *item_equal= field_item->item_equal;
if (item_equal)
{
Item_equal_iterator it(*item_equal);
Item_field *item;
while ((item= it++))
{
Field *f= item->field;
if (field->eq(f))
continue;
if (!((ref_tables | f->table->map) & param_comp))
{
tree= get_func_mm_tree(param, cond_func, f, value, cmp_type);
ftree= !ftree ? tree : tree_and(param, ftree, tree);
}
}
}
DBUG_RETURN(ftree);
}
@ -1636,17 +1725,10 @@ static SEL_TREE *
get_mm_parts(PARAM *param, Field *field, Item_func::Functype type,
Item *value, Item_result cmp_type)
{
bool ne_func= FALSE;
DBUG_ENTER("get_mm_parts");
if (field->table != param->table)
DBUG_RETURN(0);
if (type == Item_func::NE_FUNC)
{
ne_func= TRUE;
type= Item_func::LT_FUNC;
}
KEY_PART *key_part = param->key_parts;
KEY_PART *end = param->key_parts_end;
SEL_TREE *tree=0;
@ -1683,14 +1765,6 @@ get_mm_parts(PARAM *param, Field *field, Item_func::Functype type,
}
}
if (ne_func)
{
SEL_TREE *tree2= get_mm_parts(param, field, Item_func::GT_FUNC,
value, cmp_type);
if (tree2)
tree= tree_or(param,tree,tree2);
}
DBUG_RETURN(tree);
}