diff options
| author | unknown <sergefp@mysql.com> | 2005-12-27 15:04:35 +0300 |
|---|---|---|
| committer | unknown <sergefp@mysql.com> | 2005-12-27 15:04:35 +0300 |
| commit | e6bff9a606691c068cc173bc25f8539517e46925 (patch) | |
| tree | 15431e9fa1b562f790f150cc3942aa05e3384174 /sql/item.h | |
| parent | 3862ee76fd784f0ddca5b3ce255b8ca8478b85f9 (diff) | |
| download | mariadb-git-e6bff9a606691c068cc173bc25f8539517e46925.tar.gz | |
WL#2985 "Partition pruning", postreview fixes: Small code fixes and better comments
mysql-test/r/partition.result:
Added testcase for BUG#15819
mysql-test/t/partition.test:
Added testcase for BUG#15819
sql/item.h:
WL#2985 "Partition pruning", postreview fixes: better comments
sql/item_timefunc.cc:
WL#2985 "Partition pruning", postreview fixes: better comments
sql/opt_range.cc:
WL#2985 "Partition pruning", postreview fixes:
- better comments, local function renames
- Made SEL_ARG::is_singlepoint() to correctly handle NULL edge values.
- fix uninitialized variable access: s/res |=/res =/
sql/sql_class.cc:
WL#2985 "Partition pruning", postreview fixes:
Set correct max. length of "partitions" column in EXPLAIN output
sql/sql_lex.h:
WL#2985 "Partition pruning", postreview fixes: better comments
sql/sql_partition.cc:
WL#2985 "Partition pruning", postreview fixes: better comments
Diffstat (limited to 'sql/item.h')
| -rw-r--r-- | sql/item.h | 11 |
1 files changed, 9 insertions, 2 deletions
diff --git a/sql/item.h b/sql/item.h index c240733bd04..ec643dcf0c8 100644 --- a/sql/item.h +++ b/sql/item.h @@ -381,13 +381,20 @@ public: put values of field_i into table record buffer; return item->val_int(); } + + NOTE + At the moment function monotonicity is not well defined (and so may be + incorrect) for Item trees with parameters/return types that are different + 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. */ 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, /* F() is unary and (x < y) => (F(x) <= F(y)) */ + MONOTONIC_STRICT_INCREASING /* F() is unary and (x < y) => (F(x) < F(y)) */ } enum_monotonicity_info; /*************************************************************************/ |