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EXPLAIN FORMAT=JSON: Add support for single-table UPDATE/DELETE.

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This commit is contained in:
Sergei Petrunia
2014-11-28 02:36:31 +03:00
parent 461dbd80d2
commit d5fbfb9a93
9 changed files with 409 additions and 197 deletions
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35
sql/sql_explain.h
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@@ -432,6 +432,11 @@ class Explain_index_use : public Sql_alloc
public:
String_list key_parts_list;
Explain_index_use()
{
clear();
}
void clear()
{
key_name= NULL;
@@ -440,8 +445,8 @@ public:
void set(MEM_ROOT *root, KEY *key_name, uint key_len_arg);
void set_pseudo_key(MEM_ROOT *root, const char *key_name);
inline const char *get_key_name() { return key_name; }
inline uint get_key_len() { return key_len; }
inline const char *get_key_name() const { return key_name; }
inline uint get_key_len() const { return key_len; }
};
@@ -584,8 +589,8 @@ public:
private:
void append_tag_name(String *str, enum explain_extra_tag tag);
void fill_key_str(String *key_str, bool is_json);
void fill_key_len_str(String *key_len_str);
void fill_key_str(String *key_str, bool is_json) const;
void fill_key_len_str(String *key_len_str) const;
double get_r_filtered();
void tag_to_json(Json_writer *writer, enum explain_extra_tag tag);
};
@@ -614,14 +619,22 @@ public:
StringBuffer<64> table_name;
enum join_type jtype;
StringBuffer<128> possible_keys_line;
StringBuffer<128> key_str;
StringBuffer<128> key_len_str;
String_list possible_keys;
/* Used key when doing a full index scan (possibly with limit) */
Explain_index_use key;
/*
MRR that's used with quick select. This should probably belong to the
quick select
*/
StringBuffer<64> mrr_type;
Explain_quick_select *quick_info;
bool using_where;
Item *where_cond;
ha_rows rows;
bool using_filesort;
@@ -632,8 +645,8 @@ public:
virtual int print_explain(Explain_query *query, select_result_sink *output,
uint8 explain_flags, bool is_analyze);
virtual void print_explain_json(Explain_query *query, Json_writer *writer, bool is_analyze)
{ /* EXPLAIN_JSON_NOT_IMPL */}
virtual void print_explain_json(Explain_query *query, Json_writer *writer,
bool is_analyze);
};
@@ -678,8 +691,8 @@ public:
virtual int print_explain(Explain_query *query, select_result_sink *output,
uint8 explain_flags, bool is_analyze);
virtual void print_explain_json(Explain_query *query, Json_writer *writer, bool is_analyze)
{ /* EXPLAIN_JSON_NOT_IMPL */}
virtual void print_explain_json(Explain_query *query, Json_writer *writer,
bool is_analyze);
};