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tomas@poseidon.ndb.mysql.com
2005-10-06 10:54:07 +02:00
parent 418808ba9a 3af12c4776
commit 620b7bafb0
449 changed files with 13079 additions and 6107 deletions
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59
sql/sql_select.h
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@ -101,7 +101,7 @@ enum enum_nested_loop_state
typedef enum_nested_loop_state
(*Next_select_func)(JOIN *, struct st_join_table *, bool);
typedef int (*Read_record_func)(struct st_join_table *tab);
Next_select_func setup_end_select_func(JOIN *join);
typedef struct st_join_table {
TABLE *table;
@ -141,6 +141,11 @@ typedef struct st_join_table {
void cleanup();
} JOIN_TAB;
enum_nested_loop_state sub_select_cache(JOIN *join, JOIN_TAB *join_tab, bool
end_of_records);
enum_nested_loop_state sub_select(JOIN *join,JOIN_TAB *join_tab, bool
end_of_records);
typedef struct st_position /* Used in find_best */
{
@ -373,58 +378,6 @@ class JOIN :public Sql_alloc
};
/*
Server-side cursor (now stands only for basic read-only cursor)
See class implementation in sql_select.cc
A cursor has its own runtime state - list of used items and memory root of
used memory - which is different from Prepared statement runtime: it must
be different at least for the purpose of reusing the same prepared
statement for many cursors.
*/
class Cursor: public Sql_alloc, public Query_arena
{
MEM_ROOT main_mem_root;
JOIN *join;
SELECT_LEX_UNIT *unit;
TABLE *open_tables;
MYSQL_LOCK *lock;
TABLE *derived_tables;
/* List of items created during execution */
query_id_t query_id;
struct Engine_info
{
const handlerton *ht;
void *read_view;
};
Engine_info ht_info[MAX_HA];
public:
Protocol_prep protocol;
Item_change_list change_list;
select_send result;
THR_LOCK_OWNER lock_id;
my_bool close_at_commit;
/* Temporary implementation as now we replace THD state by value */
/* Save THD state into cursor */
void init_from_thd(THD *thd);
/* bzero cursor state in THD */
void reset_thd(THD *thd);
int open(JOIN *join);
void fetch(ulong num_rows);
void reset() { join= 0; }
bool is_open() const { return join != 0; }
void close(bool is_active);
void set_unit(SELECT_LEX_UNIT *unit_arg) { unit= unit_arg; }
Cursor(THD *thd);
~Cursor() {}
};
typedef struct st_select_check {
uint const_ref,reg_ref;
} SELECT_CHECK;