From 2ac3b39e68bf6bf1b56e6eafd290c0a78368d0be Mon Sep 17 00:00:00 2001 From: Sergei Petrunia Date: Fri, 28 Nov 2014 22:23:29 +0300 Subject: EXPLAIN FORMAT=JSON: support derived tables --- sql/sql_explain.h | 17 ++++++++++++++++- 1 file changed, 16 insertions(+), 1 deletion(-) (limited to 'sql/sql_explain.h') diff --git a/sql/sql_explain.h b/sql/sql_explain.h index 5fd1d5ec59a..5b2bf9fdb27 100644 --- a/sql/sql_explain.h +++ b/sql/sql_explain.h @@ -92,9 +92,16 @@ public: EXPLAIN_INSERT }; + Explain_node() : is_derived_table(false) {} + virtual enum explain_node_type get_type()= 0; virtual int get_select_id()= 0; + /* + TRUE means this is a derived table. FALSE means otherwise. + */ + bool is_derived_table; + /* 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. @@ -494,6 +501,7 @@ class Explain_table_access : public Sql_alloc { public: Explain_table_access() : + derived_select_number(0), where_cond(NULL), cache_cond(NULL), pushed_index_cond(NULL) @@ -512,6 +520,12 @@ public: /* id and 'select_type' are cared-of by the parent Explain_select */ StringBuffer<32> table_name; + /* + Non-zero number means this is a derived table. The number can be used to + find the query plan for the derived table + */ + int derived_select_number; + enum join_type type; StringBuffer<32> used_partitions; @@ -581,7 +595,8 @@ public: bool is_analyze, uint select_id, const char *select_type, bool using_temporary, bool using_filesort); - void print_explain_json(Json_writer *writer, bool is_analyze); + void print_explain_json(Explain_query *query, Json_writer *writer, + bool is_analyze); /* ANALYZE members*/ Table_access_tracker tracker; -- cgit v1.2.1