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bell@sanja.is.com.ua
2003-01-25 13:19:46 +02:00
parent bea75a4211 d56e23f64e
commit 44d8a8cdab
33 changed files with 1145 additions and 590 deletions
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54
sql/sql_select.h
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@ -119,8 +119,10 @@ class TMP_TABLE_PARAM :public Sql_alloc
{
public:
List<Item> copy_funcs;
List<Item> save_copy_funcs;
List_iterator_fast<Item> copy_funcs_it;
Copy_field *copy_field, *copy_field_end;
Copy_field *save_copy_field, *save_copy_field_end;
byte *group_buff;
Item_result_field **funcs;
MI_COLUMNDEF *recinfo,*start_recinfo;
@ -166,10 +168,13 @@ class JOIN :public Sql_alloc
List<Item> *fields;
List<Item_buff> group_fields;
TABLE *tmp_table;
// used to store 2 possible tmp table of SELECT
TABLE *exec_tmp_table1, *exec_tmp_table2;
THD *thd;
Item_sum **sum_funcs;
Procedure *procedure;
Item *having;
Item *tmp_having; // To store Having when processed tenporary table
uint select_options;
select_result *result;
TMP_TABLE_PARAM tmp_table_param;
@ -178,6 +183,8 @@ class JOIN :public Sql_alloc
SELECT_LEX_UNIT *unit;
// select that processed
SELECT_LEX *select_lex;
JOIN *tmp_join; // copy of this JOIN to be used with temporary tables
bool select_distinct, //Is select distinct?
no_order, simple_order, simple_group,
@ -186,7 +193,11 @@ class JOIN :public Sql_alloc
buffer_result;
DYNAMIC_ARRAY keyuse;
Item::cond_result cond_value;
List<Item> all_fields;
List<Item> all_fields; // to store all fields that used in query
//Above list changed to use temporary table
List<Item> tmp_all_fields1, tmp_all_fields2, tmp_all_fields3;
//Part, shared with list above, emulate following list
List<Item> tmp_fields_list1, tmp_fields_list2, tmp_fields_list3;
List<Item> & fields_list; // hold field list passed to mysql_select
int error;
@ -194,11 +205,14 @@ class JOIN :public Sql_alloc
COND *conds; // ---"---
TABLE_LIST *tables_list; //hold 'tables' parameter of mysql_selec
SQL_SELECT *select; //created in optimisation phase
TABLE *exec_tmp_table; //used in 'exec' to hold temporary
Item **ref_pointer_array; //used pointer reference for this select
// Copy of above to be used with different lists
Item **items0, **items1, **items2, **items3;
uint ref_pointer_array_size; // size of above in bytes
const char *zero_result_cause; // not 0 if exec must return zero result
my_bool union_part; // this subselect is part of union
bool union_part; // this subselect is part of union
bool optimized; // flag to avoid double optimization in EXPLAIN
JOIN(THD *thd, List<Item> &fields,
ulong select_options, select_result *result):
@ -208,14 +222,16 @@ class JOIN :public Sql_alloc
sort_and_group(0), first_record(0),
do_send_rows(1),
send_records(0), found_records(0), examined_rows(0),
exec_tmp_table1(0), exec_tmp_table2(0),
thd(thd),
sum_funcs(0),
procedure(0),
having(0),
having(0), tmp_having(0),
select_options(select_options),
result(result),
lock(thd->lock),
select_lex(0), //for safety
tmp_join(0),
select_distinct(test(select_options & SELECT_DISTINCT)),
no_order(0), simple_order(0), simple_group(0), skip_sort_order(0),
need_tmp(0),
@ -226,8 +242,10 @@ class JOIN :public Sql_alloc
fields_list(fields),
error(0),
select(0),
exec_tmp_table(0),
zero_result_cause(0)
ref_pointer_array(0), items0(0), items1(0), items2(0), items3(0),
ref_pointer_array_size(0),
zero_result_cause(0),
optimized(0)
{
fields_list = fields;
bzero((char*) &keyuse,sizeof(keyuse));
@ -235,16 +253,23 @@ class JOIN :public Sql_alloc
tmp_table_param.end_write_records= HA_POS_ERROR;
}
int prepare(TABLE_LIST *tables,
COND *conds, ORDER *order, ORDER *group, Item *having,
ORDER *proc_param, SELECT_LEX *select, SELECT_LEX_UNIT *unit,
bool fake_select_lex);
int prepare(Item ***rref_pointer_array, TABLE_LIST *tables, uint wind_num,
COND *conds, uint og_num, ORDER *order, ORDER *group,
Item *having, ORDER *proc_param, SELECT_LEX *select,
SELECT_LEX_UNIT *unit, bool fake_select_lex);
int optimize();
int global_optimize();
int reinit();
void exec();
int cleanup(THD *thd);
bool check_loop(uint id);
void restore_tmp();
inline void init_items_ref_array()
{
items0= ref_pointer_array + all_fields.elements;
ref_pointer_array_size= all_fields.elements*sizeof(Item*);
memcpy(items0, ref_pointer_array, ref_pointer_array_size);
}
};
@ -263,7 +288,10 @@ TABLE *create_tmp_table(THD *thd,TMP_TABLE_PARAM *param,List<Item> &fields,
void free_tmp_table(THD *thd, TABLE *entry);
void count_field_types(TMP_TABLE_PARAM *param, List<Item> &fields,
bool reset_with_sum_func);
bool setup_copy_fields(THD *thd, TMP_TABLE_PARAM *param,List<Item> &fields);
bool setup_copy_fields(THD *thd, TMP_TABLE_PARAM *param,
Item **ref_pointer_array,
List<Item> &new_list1, List<Item> &new_list2,
uint elements, List<Item> &fields);
void copy_fields(TMP_TABLE_PARAM *param);
void copy_funcs(Item_result_field **func_ptr);
bool create_myisam_from_heap(THD *thd, TABLE *table, TMP_TABLE_PARAM *param,