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CASE stores first_expr and else_expr in args[] array now.

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This allowed to reuse a lot of code.
This commit is contained in:
unknown
2003-07-17 16:07:56 +05:00
parent 85cc122794
commit d5a6d17707
4 changed files with 46 additions and 108 deletions
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24
sql/item_cmpfunc.h
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@ -348,27 +348,37 @@ public:
class Item_func_case :public Item_func
{
Item * first_expr, *else_expr;
int first_expr_num, else_expr_num;
enum Item_result cached_result_type;
String tmp_value;
bool first_expr_is_binary;
uint ncases;
public:
Item_func_case(List<Item> &list, Item *first_expr_arg, Item *else_expr_arg)
:Item_func(list), first_expr(first_expr_arg), else_expr(else_expr_arg),
:Item_func(), first_expr_num(-1), else_expr_num(-1),
cached_result_type(INT_RESULT)
{}
{
ncases= list.elements;
if (first_expr_arg)
{
first_expr_num= list.elements;
list.push_back(first_expr_arg);
}
if (else_expr_arg)
{
else_expr_num= list.elements;
list.push_back(else_expr_arg);
}
set_arguments(list);
}
double val();
longlong val_int();
String *val_str(String *);
void fix_length_and_dec();
void update_used_tables();
enum Item_result result_type () const { return cached_result_type; }
const char *func_name() const { return "case"; }
void print(String *str);
bool fix_fields(THD *thd, struct st_table_list *tlist, Item **ref);
void split_sum_func(Item **ref_pointer_array, List<Item> &fields);
Item *find_item(String *str);
void set_outer_resolving();
};