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Fixed bug mdev-11096.

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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.
This commit is contained in:
Igor Babaev
2016-10-24 10:15:11 -07:00
parent 26b87c332f
commit 9d4a0dde0a
5 changed files with 79 additions and 14 deletions
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5
sql/sql_statistics.h
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@ -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);
}
};