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[SHOW] EXPLAIN UPDATE/DELETE, code re-structuring

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- Make EXPLAIN UPDATE/DELETE use "Query Plan Footprints", too.
This commit is contained in:
Sergey Petrunya
2013-06-18 21:08:34 +04:00
parent 1c6fc3f6b9
commit 1951d40a88
6 changed files with 152 additions and 115 deletions
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18
sql/sql_lex.h
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@ -2378,6 +2378,7 @@ public:
SQL_SELECT *select;
uint index;
ha_rows table_rows; /* Use if select==NULL */
/*
Top-level select_lex. Most of its fields are not used, we need it only to
get to the subqueries.
@ -2390,11 +2391,20 @@ public:
/* Set this plan to be a plan to do nothing because of impossible WHRE*/
void set_impossible_where() { impossible_where= true; }
virtual int print_explain(select_result_sink *output, uint8 explain_flags,
bool *printed_anything);
virtual int print_explain(select_result_sink *output, uint8 explain_flags);
virtual ~Update_plan() {}
Update_plan() : impossible_where(false), using_filesort(false) {}
void save_query_plan_footprint();
/* Query Plan Footprint fields */
// cant use it here: enum join_type
int jtype;
bool using_where;
StringBuffer<128> possible_keys_line;
StringBuffer<128> key_str;
StringBuffer<128> key_len_str;
StringBuffer<64> mrr_type;
};
@ -2414,8 +2424,7 @@ public:
deleting_all_rows= true;
table_rows= rows_arg;
}
int print_explain(select_result_sink *output, uint8 explain_flags,
bool *printed_anything);
int print_explain(select_result_sink *output, uint8 explain_flags);
};
@ -2432,7 +2441,6 @@ struct LEX: public Query_tables_list
SELECT_LEX *all_selects_list;
/* For single-table DELETE: its query plan */
Update_plan *upd_del_plan;
QPF_query *query_plan_footprint;
char *length,*dec,*change;