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This commit is contained in:
Mattias Jonsson 2009-08-26 14:40:18 +02:00
commit 0000c9417a
9 changed files with 624 additions and 12 deletions
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sql/item.h
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@ -397,13 +397,20 @@ public:
from INT_RESULT, may be NULL, or are unsigned.
It will be possible to address this issue once the related partitioning bugs
(BUG#16002, BUG#15447, BUG#13436) are fixed.
The NOT_NULL enums are used in TO_DAYS, since TO_DAYS('2001-00-00') returns
NULL which puts those rows into the NULL partition, but
'2000-12-31' < '2001-00-00' < '2001-01-01'. So special handling is needed
for this (see Bug#20577).
*/
typedef enum monotonicity_info
{
NON_MONOTONIC, /* none of the below holds */
MONOTONIC_INCREASING, /* F() is unary and (x < y) => (F(x) <= F(y)) */
MONOTONIC_STRICT_INCREASING /* F() is unary and (x < y) => (F(x) < F(y)) */
MONOTONIC_INCREASING_NOT_NULL, /* But only for valid/real x and y */
MONOTONIC_STRICT_INCREASING,/* F() is unary and (x < y) => (F(x) < F(y)) */
MONOTONIC_STRICT_INCREASING_NOT_NULL /* But only for valid/real x and y */
} enum_monotonicity_info;
/*************************************************************************/