diff options
Diffstat (limited to 'sql/sql_statistics.cc')
| -rw-r--r-- | sql/sql_statistics.cc | 15 |
1 files changed, 4 insertions, 11 deletions
diff --git a/sql/sql_statistics.cc b/sql/sql_statistics.cc index 47a5a40ebeb..70080a6b4f1 100644 --- a/sql/sql_statistics.cc +++ b/sql/sql_statistics.cc @@ -1003,11 +1003,13 @@ public: switch (i) { case COLUMN_STAT_MIN_VALUE: + table_field->read_stats->min_value->set_notnull(); stat_field->val_str(&val); table_field->read_stats->min_value->store(val.ptr(), val.length(), &my_charset_bin); break; case COLUMN_STAT_MAX_VALUE: + table_field->read_stats->max_value->set_notnull(); stat_field->val_str(&val); table_field->read_stats->max_value->store(val.ptr(), val.length(), &my_charset_bin); @@ -3659,17 +3661,8 @@ double get_column_range_cardinality(Field *field, { double avg_frequency= col_stats->get_avg_frequency(); res= avg_frequency; - /* - psergey-todo: what does check for min_value, max_value mean? - min/max_value are set to NULL in alloc_statistics_for_table() and - alloc_statistics_for_table_share(). Both functions will immediately - call create_min_max_statistical_fields_for_table and - create_min_max_statistical_fields_for_table_share() respectively, - which will set min/max_value to be valid pointers, unless OOM - occurs. - */ if (avg_frequency > 1.0 + 0.000001 && - col_stats->min_value && col_stats->max_value) + col_stats->min_max_values_are_provided()) { Histogram *hist= &col_stats->histogram; if (hist->is_available()) @@ -3692,7 +3685,7 @@ double get_column_range_cardinality(Field *field, } else { - if (col_stats->min_value && col_stats->max_value) + if (col_stats->min_max_values_are_provided()) { double sel, min_mp_pos, max_mp_pos; |