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new SELECT_LEX structures used for storing global ORDER BY, global LIMIT & limit counters

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This commit is contained in:
bell@sanja.is.com.ua
2002-05-08 23:14:40 +03:00
parent 494184ff5f
commit ead6f225a4
15 changed files with 208 additions and 181 deletions
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23
sql/sql_class.h
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@ -382,7 +382,7 @@ public:
#endif
ulonglong next_insert_id,last_insert_id,current_insert_id,
limit_found_rows;
ha_rows select_limit,offset_limit,default_select_limit,cuted_fields,
ha_rows default_select_limit,cuted_fields,
max_join_size, sent_row_count, examined_row_count;
table_map used_tables;
UC *user_connect;
@ -551,10 +551,15 @@ void send_error(NET *net,uint sql_errno=0, const char *err=0);
class select_result :public Sql_alloc {
protected:
THD *thd;
SELECT_LEX_UNIT *unit;
public:
select_result();
virtual ~select_result() {};
virtual int prepare(List<Item> &list) { return 0; }
virtual int prepare(List<Item> &list, SELECT_LEX_UNIT *u)
{
unit= u;
return 0;
}
virtual bool send_fields(List<Item> &list,uint flag)=0;
virtual bool send_data(List<Item> &items)=0;
virtual void initialize_tables (JOIN *join=0) {}
@ -587,7 +592,7 @@ class select_export :public select_result {
public:
select_export(sql_exchange *ex) :exchange(ex),file(-1),row_count(0L) {}
~select_export();
int prepare(List<Item> &list);
int prepare(List<Item> &list, SELECT_LEX_UNIT *u);
bool send_fields(List<Item> &list,
uint flag) { return 0; }
bool send_data(List<Item> &items);
@ -606,7 +611,7 @@ public:
select_dump(sql_exchange *ex) :exchange(ex),file(-1),row_count(0L)
{ path[0]=0; }
~select_dump();
int prepare(List<Item> &list);
int prepare(List<Item> &list, SELECT_LEX_UNIT *u);
bool send_fields(List<Item> &list,
uint flag) { return 0; }
bool send_data(List<Item> &items);
@ -629,7 +634,7 @@ class select_insert :public select_result {
info.handle_duplicates=duplic;
}
~select_insert();
int prepare(List<Item> &list);
int prepare(List<Item> &list, SELECT_LEX_UNIT *u);
bool send_fields(List<Item> &list, uint flag)
{ return 0; }
bool send_data(List<Item> &items);
@ -658,7 +663,7 @@ public:
create_info(create_info_par),
lock(0)
{}
int prepare(List<Item> &list);
int prepare(List<Item> &list, SELECT_LEX_UNIT *u);
bool send_data(List<Item> &values);
bool send_eof();
void abort();
@ -672,7 +677,7 @@ class select_union :public select_result {
select_union(TABLE *table_par);
~select_union();
int prepare(List<Item> &list);
int prepare(List<Item> &list, SELECT_LEX_UNIT *u);
bool send_fields(List<Item> &list, uint flag)
{ return 0; }
bool send_data(List<Item> &items);
@ -787,7 +792,7 @@ public:
multi_delete(THD *thd, TABLE_LIST *dt, thr_lock_type lock_option_arg,
uint num_of_tables);
~multi_delete();
int prepare(List<Item> &list);
int prepare(List<Item> &list, SELECT_LEX_UNIT *u);
bool send_fields(List<Item> &list,
uint flag) { return 0; }
bool send_data(List<Item> &items);
@ -816,7 +821,7 @@ public:
enum enum_duplicates handle_duplicates,
thr_lock_type lock_option_arg, uint num);
~multi_update();
int prepare(List<Item> &list);
int prepare(List<Item> &list, SELECT_LEX_UNIT *u);
bool send_fields(List<Item> &list,
uint flag) { return 0; }
bool send_data(List<Item> &items);