diff options
Diffstat (limited to 'sql/sql_explain.h')
| -rw-r--r-- | sql/sql_explain.h | 88 |
1 files changed, 60 insertions, 28 deletions
diff --git a/sql/sql_explain.h b/sql/sql_explain.h index 919d51aef8b..1fe7d08c6f8 100644 --- a/sql/sql_explain.h +++ b/sql/sql_explain.h @@ -120,21 +120,29 @@ public: enum explain_connection_type connection_type; protected: + struct Child_info + { + int select_no; + bool is_eliminated; + }; /* A node may have children nodes. When a node's explain structure is - created, children nodes may not yet have QPFs. This is why we store ids. + created, children nodes may not yet have QPFs. This is why we store + pairs {select_no, is_eliminated}. */ - Dynamic_array<int> children; + Dynamic_array<Child_info> children; public: - void add_child(int select_no) + void add_child(int select_no, bool is_eliminated= false) { - children.append(select_no); + children.append({select_no, is_eliminated}); } virtual int print_explain(Explain_query *query, select_result_sink *output, - uint8 explain_flags, bool is_analyze)=0; + uint8 explain_flags, bool is_analyze, + bool is_eliminated= false)= 0; virtual void print_explain_json(Explain_query *query, Json_writer *writer, - bool is_analyze, bool no_tmp_tbl)= 0; + bool is_analyze, bool no_tmp_tbl, + bool is_eliminated= false)= 0; int print_explain_for_children(Explain_query *query, select_result_sink *output, uint8 explain_flags, bool is_analyze); @@ -172,12 +180,15 @@ public: uint select_id; int print_explain(Explain_query *query, select_result_sink *output, - uint8 explain_flags, bool is_analyze); - void print_explain_json(Explain_query *query, Json_writer *writer, - bool is_analyze, bool no_tmp_tbl); - + uint8 explain_flags, bool is_analyze, + bool is_eliminated= false) override; + void print_explain_json(Explain_query *query, Json_writer *writer, + bool is_analyze, bool no_tmp_tbl, + bool is_eliminated= false) override; + // OLEGS: check this func and is the flag is_eliminated required void print_explain_json_interns(Explain_query *query, Json_writer *writer, - bool is_analyze, bool no_tmp_tbl); + bool is_analyze, bool no_tmp_tbl, + bool is_eliminated); /* A flat array of Explain structs for tables. */ Explain_table_access** join_tabs; @@ -258,10 +269,12 @@ public: */ Explain_aggr_node* aggr_tree; - int print_explain(Explain_query *query, select_result_sink *output, - uint8 explain_flags, bool is_analyze); - void print_explain_json(Explain_query *query, Json_writer *writer, - bool is_analyze, bool no_tmp_tbl); + int print_explain(Explain_query *query, select_result_sink *output, + uint8 explain_flags, bool is_analyze, + bool is_eliminated= false) override; + void print_explain_json(Explain_query *query, Json_writer *writer, + bool is_analyze, bool no_tmp_tbl, + bool is_eliminated= false) override; Table_access_tracker *get_using_temporary_read_tracker() { @@ -346,7 +359,7 @@ extern const char *pushed_select_text; class Explain_union : public Explain_node { public: - Explain_union(MEM_ROOT *root, bool is_analyze) : + Explain_union(MEM_ROOT *root, bool is_analyze) : Explain_node(root), union_members(PSI_INSTRUMENT_MEM), is_recursive_cte(false), fake_select_lex_explain(root, is_analyze) @@ -377,10 +390,12 @@ public: { union_members.append(select_no); } - int print_explain(Explain_query *query, select_result_sink *output, - uint8 explain_flags, bool is_analyze); - void print_explain_json(Explain_query *query, Json_writer *writer, - bool is_analyze, bool no_tmp_tbl); + int print_explain(Explain_query *query, select_result_sink *output, + uint8 explain_flags, bool is_analyze, + bool is_eliminated) override; + void print_explain_json(Explain_query *query, Json_writer *writer, + bool is_analyze, bool no_tmp_tbl, + bool is_eliminated) override; const char *fake_select_type; bool using_filesort; @@ -755,6 +770,7 @@ public: full_scan_on_null_key(false), start_dups_weedout(false), end_dups_weedout(false), + is_eliminated(false), where_cond(NULL), cache_cond(NULL), pushed_index_cond(NULL), @@ -836,6 +852,9 @@ public: bool start_dups_weedout; bool end_dups_weedout; + + /* OLEGS: comment*/ + bool is_eliminated; /* Note: lifespan of WHERE condition is less than lifespan of this object. @@ -874,9 +893,11 @@ public: int print_explain(select_result_sink *output, uint8 explain_flags, bool is_analyze, uint select_id, const char *select_type, - bool using_temporary, bool using_filesort); + bool using_temporary, bool using_filesort, + bool is_parent_node_eliminated= false); void print_explain_json(Explain_query *query, Json_writer *writer, - bool is_analyze, bool no_tmp_tbl); + bool is_analyze, bool no_tmp_tbl, + bool is_parent_node_eliminated= false); private: void append_tag_name(String *str, enum explain_extra_tag tag); @@ -885,6 +906,11 @@ private: double get_r_filtered(); void tag_to_json(Json_writer *writer, enum explain_extra_tag tag, bool no_tmp_tbl); + int print_explain_eliminated(select_result_sink *output, uint8 explain_flags, + bool is_analyze, uint select_id, + const char *select_type); + void print_explain_json_eliminated(Explain_query *query, + Json_writer *writer); }; @@ -965,9 +991,11 @@ public: Exec_time_tracker table_tracker; virtual int print_explain(Explain_query *query, select_result_sink *output, - uint8 explain_flags, bool is_analyze); + uint8 explain_flags, bool is_analyze, + bool is_eliminated= false) override; virtual void print_explain_json(Explain_query *query, Json_writer *writer, - bool is_analyze, bool no_tmp_tbl); + bool is_analyze, bool no_tmp_tbl, + bool is_eliminated= false) override; }; @@ -991,9 +1019,11 @@ public: uint get_select_id() { return 1; /* always root */ } int print_explain(Explain_query *query, select_result_sink *output, - uint8 explain_flags, bool is_analyze); + uint8 explain_flags, bool is_analyze, + bool is_eliminated= false) override; void print_explain_json(Explain_query *query, Json_writer *writer, - bool is_analyze, bool no_tmp_tbl); + bool is_analyze, bool no_tmp_tbl, + bool is_eliminated= false) override; }; @@ -1018,9 +1048,11 @@ public: virtual uint get_select_id() { return 1; /* always root */ } virtual int print_explain(Explain_query *query, select_result_sink *output, - uint8 explain_flags, bool is_analyze); + uint8 explain_flags, bool is_analyze, + bool is_eliminated= false) override; virtual void print_explain_json(Explain_query *query, Json_writer *writer, - bool is_analyze, bool no_tmp_tbl); + bool is_analyze, bool no_tmp_tbl, + bool is_eliminated= false) override; }; |