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subselect with union

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new error handling
Item_ref bug fixed
This commit is contained in:
bell@sanja.is.com.ua
2002-09-03 09:50:36 +03:00
parent 189d1dd630
commit b07aaeb295
25 changed files with 686 additions and 382 deletions
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32
sql/sql_lex.h
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@ -216,7 +216,22 @@ private:
*/
class st_lex;
class st_select_lex;
class THD;
class select_result;
class JOIN;
class select_union;
class st_select_lex_unit: public st_select_lex_node {
protected:
List<Item> item_list;
List<JOIN*> joins; /* list of *JOINs, to delete it in cleanup() */
TABLE_LIST result_table_list;
select_union *union_result;
TABLE *table; /* temporary table using for appending UNION results */
THD *thd;
select_result *result;
int res;
bool describe, found_rows_for_union,
optimized; // optimize phase already performed for UNION (unit)
public:
/*
Pointer to 'last' select or pointer to unit where stored
@ -225,12 +240,21 @@ public:
st_select_lex_node *global_parameters;
/* LIMIT clause runtime counters */
ha_rows select_limit_cnt, offset_limit_cnt;
bool depended; /* depended from outer select subselect */
/* not NULL if union used in subselect, point to subselect item */
Item_subselect *item;
void init_query();
bool create_total_list(THD *thd, st_lex *lex, TABLE_LIST **result);
st_select_lex* outer_select() { return (st_select_lex*) master; }
st_select_lex* first_select() { return (st_select_lex*) slave; }
st_select_lex_unit* next_unit() { return (st_select_lex_unit*) next; }
/* UNION methods */
int prepare(THD *thd, select_result *result);
int exec();
int cleanup();
friend void mysql_init_query(THD *thd);
private:
bool create_total_list_n_last_return(THD *thd, st_lex *lex,
@ -241,7 +265,6 @@ typedef struct st_select_lex_unit SELECT_LEX_UNIT;
/*
SELECT_LEX - store information of parsed SELECT_LEX statment
*/
class JOIN;
class st_select_lex: public st_select_lex_node {
public:
char *db, *db1, *table1, *db2, *table2; /* For outer join using .. */
@ -252,7 +275,12 @@ public:
List<Item> item_list; /* list of fields & expressions */
List<String> interval_list, use_index, *use_index_ptr,
ignore_index, *ignore_index_ptr;
List<Item_func_match> ftfunc_list;
/*
Usualy it is pointer to ftfunc_list_alloc, but in union used to create fake
select_lex for calling mysql_select under results of union
*/
List<Item_func_match> *ftfunc_list;
List<Item_func_match> ftfunc_list_alloc;
JOIN *join; /* after JOIN::prepare it is pointer to corresponding JOIN */
uint in_sum_expr;
bool create_refs,