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| author | Igor Babaev <igor@askmonty.org> | 2013-03-25 23:48:29 -0700 |
|---|---|---|
| committer | Igor Babaev <igor@askmonty.org> | 2013-03-25 23:48:29 -0700 |
| commit | 1009832c13380365c03f77fcabd0fda470b73390 (patch) | |
| tree | 73e123df951d60220a4cb0cac2ca19b2ebff7056 /sql/field.cc | |
| parent | fc1c8ffdadfd14eb51969ecfde43e3204f10f6f8 (diff) | |
| download | mariadb-git-1009832c13380365c03f77fcabd0fda470b73390.tar.gz | |
Added histogams for table columns.
Diffstat (limited to 'sql/field.cc')
| -rw-r--r-- | sql/field.cc | 13 |
1 files changed, 13 insertions, 0 deletions
diff --git a/sql/field.cc b/sql/field.cc index e54a3e59795..afa12f84178 100644 --- a/sql/field.cc +++ b/sql/field.cc @@ -8420,6 +8420,19 @@ my_decimal *Field_bit::val_decimal(my_decimal *deciaml_value) } +double Field_bit::middle_point_pos(Field *min, Field *max) +{ + double n, d; + n= val_real() - min->val_real(); + if (n < 0) + return 0.0; + d= max->val_real() - min->val_real(); + if (d <= 0) + return 1.0; + return min(n/d, 1.0); +} + + /* Compare two bit fields using pointers within the record. SYNOPSIS |