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MDEV-6995: EXPLAIN JSON and ORDER BY, GROUP BY, etc

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- Make ANALYZE correctly remember and report filesort() calls
- Temp.table use is collected but only basic info is reported.
This commit is contained in:
Sergei Petrunia
2015-06-06 00:32:27 +03:00
parent f7002c05ae
commit 93fc04ff1d
6 changed files with 339 additions and 46 deletions
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7
sql/sql_explain.h
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@@ -171,7 +171,8 @@ public:
void print_explain_json_interns(Explain_query *query, Json_writer *writer,
bool is_analyze,
Filesort_tracker *first_table_sort);
Filesort_tracker *first_table_sort,
bool first_table_sort_used);
/* A flat array of Explain structs for tables. */
Explain_table_access** join_tabs;
@@ -704,7 +705,9 @@ public:
uint select_id, const char *select_type,
bool using_temporary, bool using_filesort);
void print_explain_json(Explain_query *query, Json_writer *writer,
bool is_analyze, Filesort_tracker *fs_tracker);
bool is_analyze,
Filesort_tracker *fs_tracker,
bool first_table_sort_used);
private:
void append_tag_name(String *str, enum explain_extra_tag tag);