diff options
Diffstat (limited to 'sql/opt_range.h')
| -rw-r--r-- | sql/opt_range.h | 17 |
1 files changed, 15 insertions, 2 deletions
diff --git a/sql/opt_range.h b/sql/opt_range.h index 8d2ba1bb0a6..393ffcb2115 100644 --- a/sql/opt_range.h +++ b/sql/opt_range.h @@ -616,6 +616,7 @@ private: uchar *last_prefix; /* Prefix of the last group for detecting EOF. */ bool have_min; /* Specify whether we are computing */ bool have_max; /* a MIN, a MAX, or both. */ + bool have_agg_distinct;/* aggregate_function(DISTINCT ...). */ bool seen_first_key; /* Denotes whether the first key was retrieved.*/ KEY_PART_INFO *min_max_arg_part; /* The keypart of the only argument field */ /* of all MIN/MAX functions. */ @@ -629,6 +630,11 @@ private: List<Item_sum> *max_functions; List_iterator<Item_sum> *min_functions_it; List_iterator<Item_sum> *max_functions_it; + /* + Use index scan to get the next different key instead of jumping into it + through index read + */ + bool is_index_scan; public: /* The following two members are public to allow easy access from @@ -646,12 +652,13 @@ private: void update_max_result(); public: QUICK_GROUP_MIN_MAX_SELECT(TABLE *table, JOIN *join, bool have_min, - bool have_max, KEY_PART_INFO *min_max_arg_part, + bool have_max, bool have_agg_distinct, + KEY_PART_INFO *min_max_arg_part, uint group_prefix_len, uint group_key_parts, uint used_key_parts, KEY *index_info, uint use_index, double read_cost, ha_rows records, uint key_infix_len, uchar *key_infix, MEM_ROOT - *parent_alloc); + *parent_alloc, bool is_index_scan); ~QUICK_GROUP_MIN_MAX_SELECT(); bool add_range(SEL_ARG *sel_range); void update_key_stat(); @@ -667,6 +674,12 @@ public: #ifndef DBUG_OFF 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)")); + } }; |