diff options
Diffstat (limited to 'sql/sql_lex.h')
| -rw-r--r-- | sql/sql_lex.h | 44 |
1 files changed, 35 insertions, 9 deletions
diff --git a/sql/sql_lex.h b/sql/sql_lex.h index 22e682fef38..5c113e46a2b 100644 --- a/sql/sql_lex.h +++ b/sql/sql_lex.h @@ -186,11 +186,15 @@ enum sub_select_type {UNSPECIFIED_TYPE,UNION_TYPE, INTERSECT_TYPE, Base class for st_select_lex (SELECT_LEX) & st_select_lex_unit (SELECT_LEX_UNIT) */ -struct st_select_lex_node { - enum sub_select_type linkage; +class st_select_lex_node { +protected: st_select_lex_node *next, **prev, /* neighbor list */ *master, *slave, /* vertical links */ *link_next, **link_prev; /* list of whole SELECT_LEX */ +public: + ulong options; + enum sub_select_type linkage; + //uint sort_default; SQL_LIST order_list; /* ORDER clause */ ha_rows select_limit, offset_limit; /* LIMIT clause parameters */ void init_query(); @@ -207,9 +211,10 @@ private: SELECT_LEX_UNIT - unit of selects (UNION, INTERSECT, ...) group SELECT_LEXs */ -struct st_lex; -struct st_select_lex; -struct st_select_lex_unit: public st_select_lex_node { +class st_lex; +class st_select_lex; +class st_select_lex_unit: public st_select_lex_node { +public: /* Pointer to 'last' select or pointer to unit where stored global parameters for union @@ -219,8 +224,11 @@ struct st_select_lex_unit: public st_select_lex_node { ha_rows select_limit_cnt, offset_limit_cnt; 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; } + + friend void mysql_init_query(THD *thd); private: bool create_total_list_n_last_return(THD *thd, st_lex *lex, TABLE_LIST ***result); @@ -230,10 +238,10 @@ typedef struct st_select_lex_unit SELECT_LEX_UNIT; /* SELECT_LEX - store information of parsed SELECT_LEX statment */ -struct st_select_lex: public st_select_lex_node { +class st_select_lex: public st_select_lex_node { +public: char *db, *db1, *table1, *db2, *table2; /* For outer join using .. */ Item *where, *having; /* WHERE & HAVING clauses */ - ulong options; List<List_item> expr_list; List<List_item> when_list; /* WHEN clause */ SQL_LIST table_list, group_list; /* FROM & GROUP BY clauses */ @@ -241,14 +249,32 @@ struct st_select_lex: public st_select_lex_node { List<String> interval_list, use_index, *use_index_ptr, ignore_index, *ignore_index_ptr; List<Item_func_match> ftfunc_list; - uint in_sum_expr, sort_default; + uint in_sum_expr; bool create_refs, braces, /* SELECT ... UNION (SELECT ... ) <- this braces */ depended; /* depended from outer select subselect */ void init_query(); void init_select(); - st_select_lex* outer_select() { return (st_select_lex*) master->master; } + st_select_lex_unit* master_unit() { return (st_select_lex_unit*) master; } + st_select_lex_unit* first_inner_unit() + { + return (st_select_lex_unit*) slave; + } + st_select_lex* outer_select() + { + return (st_select_lex*) master_unit()->outer_select(); + } st_select_lex* next_select() { return (st_select_lex*) next; } + st_select_lex* next_select_in_list() + { + return (st_select_lex*) link_next; + } + st_select_lex_node** next_select_in_list_addr() + { + return &link_next; + } + + friend void mysql_init_query(THD *thd); }; typedef struct st_select_lex SELECT_LEX; |