diff options
Diffstat (limited to 'sql/opt_range.h')
| -rw-r--r-- | sql/opt_range.h | 30 |
1 files changed, 12 insertions, 18 deletions
diff --git a/sql/opt_range.h b/sql/opt_range.h index 3dbdce00e9d..4f2ab6df60d 100644 --- a/sql/opt_range.h +++ b/sql/opt_range.h @@ -52,7 +52,7 @@ typedef struct st_key_part { Field::imagetype image_type; } KEY_PART; - +class Explain_quick_select; /* A "MIN_TUPLE < tbl.key_tuple < MAX_TUPLE" interval. @@ -345,13 +345,8 @@ public: void add_key_name(String *str, bool *first); - /* - Append text representation of quick select structure (what and how is - merged) to str. The result is added to "Extra" field in EXPLAIN output. - This function is implemented only by quick selects that merge other quick - selects output and/or can produce output suitable for merging. - */ - virtual void add_info_string(String *str) {} + /* Save information about quick select's query plan */ + virtual Explain_quick_select* get_explain(MEM_ROOT *alloc)= 0; /* Return 1 if any index used by this quick select @@ -478,7 +473,7 @@ public: { file->position(record); } int get_type() { return QS_TYPE_RANGE; } void add_keys_and_lengths(String *key_names, String *used_lengths); - void add_info_string(String *str); + Explain_quick_select *get_explain(MEM_ROOT *alloc); #ifndef DBUG_OFF void dbug_dump(int indent, bool verbose); #endif @@ -615,6 +610,7 @@ public: #ifndef DBUG_OFF void dbug_dump(int indent, bool verbose); #endif + Explain_quick_select *get_explain(MEM_ROOT *alloc); bool push_quick_back(QUICK_RANGE_SELECT *quick_sel_range); @@ -663,7 +659,6 @@ public: int get_next(); int get_type() { return QS_TYPE_INDEX_MERGE; } void add_keys_and_lengths(String *key_names, String *used_lengths); - void add_info_string(String *str); }; class QUICK_INDEX_INTERSECT_SELECT : public QUICK_INDEX_SORT_SELECT @@ -679,7 +674,7 @@ public: int get_next(); int get_type() { return QS_TYPE_INDEX_INTERSECT; } void add_keys_and_lengths(String *key_names, String *used_lengths); - void add_info_string(String *str); + Explain_quick_select *get_explain(MEM_ROOT *alloc); }; @@ -717,7 +712,7 @@ public: bool unique_key_range() { return false; } int get_type() { return QS_TYPE_ROR_INTERSECT; } void add_keys_and_lengths(String *key_names, String *used_lengths); - void add_info_string(String *str); + Explain_quick_select *get_explain(MEM_ROOT *alloc); bool is_keys_used(const MY_BITMAP *fields); #ifndef DBUG_OFF void dbug_dump(int indent, bool verbose); @@ -796,7 +791,7 @@ public: bool unique_key_range() { return false; } int get_type() { return QS_TYPE_ROR_UNION; } void add_keys_and_lengths(String *key_names, String *used_lengths); - void add_info_string(String *str); + Explain_quick_select *get_explain(MEM_ROOT *alloc); bool is_keys_used(const MY_BITMAP *fields); #ifndef DBUG_OFF void dbug_dump(int indent, bool verbose); @@ -944,11 +939,8 @@ public: void dbug_dump(int indent, bool verbose); #endif bool is_agg_distinct() { return have_agg_distinct; } - virtual void append_loose_scan_type(String *str) - { - if (is_index_scan) - str->append(STRING_WITH_LEN(" (scanning)")); - } + bool loose_scan_is_scanning() { return is_index_scan; } + Explain_quick_select *get_explain(MEM_ROOT *alloc); }; @@ -990,6 +982,8 @@ class SQL_SELECT :public Sql_alloc { key_map quick_keys; // Possible quick keys key_map needed_reg; // Possible quick keys after prev tables. table_map const_tables,read_tables; + /* See PARAM::possible_keys */ + key_map possible_keys; bool free_cond; /* Currently not used and always FALSE */ SQL_SELECT(); |