diff options
Diffstat (limited to 'sql/sql_lex.h')
| -rw-r--r-- | sql/sql_lex.h | 32 |
1 files changed, 30 insertions, 2 deletions
diff --git a/sql/sql_lex.h b/sql/sql_lex.h index af80b175cd3..b75826663ca 100644 --- a/sql/sql_lex.h +++ b/sql/sql_lex.h @@ -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 class 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, |