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| author | Igor Babaev <igor@askmonty.org> | 2016-10-24 10:15:11 -0700 |
|---|---|---|
| committer | Igor Babaev <igor@askmonty.org> | 2016-10-26 20:45:35 -0700 |
| commit | 9d4a0dde0ae3e0d46b4c5c0967c25862d467e94e (patch) | |
| tree | 51da4792c18533900c08cfb9b07d3bd12af97819 /sql/sql_statistics.h | |
| parent | 26b87c332ff78a7aca04930ad86fbf7acc793222 (diff) | |
| download | mariadb-git-9d4a0dde0ae3e0d46b4c5c0967c25862d467e94e.tar.gz | |
Fixed bug mdev-11096.
1. When min/max value is provided the null flag for it must be set to 0
in the bitmap Culumn_statistics::column_stat_nulls.
2. When the calculation of the selectivity of the range condition
over a column requires min and max values for the column then we
have to check that these values are provided.
Diffstat (limited to 'sql/sql_statistics.h')
| -rw-r--r-- | sql/sql_statistics.h | 5 |
1 files changed, 5 insertions, 0 deletions
diff --git a/sql/sql_statistics.h b/sql/sql_statistics.h index 46e5cef22d1..8e5f8107849 100644 --- a/sql/sql_statistics.h +++ b/sql/sql_statistics.h @@ -388,6 +388,11 @@ public: avg_frequency= (ulong) (val * Scale_factor_avg_frequency); } + bool min_max_values_are_provided() + { + return !is_null(COLUMN_STAT_MIN_VALUE) && + !is_null(COLUMN_STAT_MIN_VALUE); + } }; |