Alexey Milovidov
f3bb24a3bf
Better semantic of sharing columns: development [#CLICKHOUSE-2].
2017-12-14 04:43:19 +03:00
Alexey Milovidov
c3015bece3
Miscellaneous [#CLICKHOUSE-2].
2017-12-11 01:44:04 +03:00
Alexey Milovidov
291467647a
Cleanup semantics of data types [#CLICKHOUSE-2].
2017-12-09 19:17:37 +03:00
Alexey Milovidov
d2cfda4d9b
Cleanup semantics of data types [#CLICKHOUSE-2].
2017-12-09 19:17:37 +03:00
Alexey Milovidov
c748493a86
Better [#CLICKHOUSE-2].
2017-12-02 05:47:12 +03:00
Alexey Milovidov
60477a9aaa
Enhanced time zones support: the DateTime data type can track time zone [#CLICKHOUSE-3402].
2017-11-09 22:25:21 +03:00
Alexey Milovidov
8e4253ac73
Fixed error when Date argument can be passed to toStartOfDay function [#CLICKHOUSE-2].
2017-11-05 08:17:48 +03:00
Alexey Milovidov
ad8afcc022
Added functions to implement INTERVAL operations [#CLICKHOUSE-3393].
2017-10-30 08:39:30 +03:00
Alexey Milovidov
7ecc63fe71
Functions for interval arithmetic on DateTime and Date: development [#CLICKHOUSE-2].
2017-10-29 07:18:48 +03:00
Alexey Milovidov
4236bcbfa2
Fixed year 2038 problem. Added support for timezones with fractional offset from UTC. [#CLICKHOUSE-2099] [#CLICKHOUSE-3392].
2017-10-29 03:51:40 +03:00
Alexey Milovidov
86c46ad1bd
Unification [#CLICKHOUSE-2].
2017-09-15 15:16:12 +03:00
proller
1a8e22c37f
Allow compile on 32bit systems ( #1175 )
...
* Trying compile under 32bit..
* PerformanceTest: use getMultiple*FromConfig, fix debug helpers
* Missing file
* clnag-format of Split ComplexKeyCacheDictionary
* wip
* Requested changes
* wip
* wip
* Fix boost 1.64 and gcc7+ compile errors
* More fixes
* wip
* Fix arm build
* wip
* wip
* wip
* wip
* wip
* wip
* wip
* clean
* fix
* wip
* wip
* clean
* clean
* wip
* wip
* Update MergeTreeSettings.h
* Requested changes
* Requested changes
* Requested changes
* Requested changes
2017-09-01 20:21:03 +03:00
Alexey Milovidov
ee81d53bd5
Functions simplification [#CLICKHOUSE-2].
2017-07-25 01:44:13 +03:00
Nikolai Kochetov
5477e7c1f9
added date and time to number functions [#CLICKHOUSE-3132]
2017-07-21 20:51:08 +03:00
alexey-milovidov
d4d266fa18
ColumnConst unification ( #1011 )
...
* ColumnConst: unification (incomplete) [#CLICKHOUSE-3150].
* ColumnConst: unification (incomplete) [#CLICKHOUSE-3150].
* ColumnConst: unification (incomplete) [#CLICKHOUSE-3150].
* ColumnConst: unification (incomplete) [#CLICKHOUSE-3150].
* ColumnConst: unification (incomplete) [#CLICKHOUSE-3150].
* ColumnConst: unification (incomplete) [#CLICKHOUSE-3150].
* ColumnConst: unification (incomplete) [#CLICKHOUSE-3150].
* ColumnConst: unification (incomplete) [#CLICKHOUSE-3150].
* ColumnConst: unification (incomplete) [#CLICKHOUSE-3150].
* ColumnConst: unification (incomplete) [#CLICKHOUSE-3150].
* ColumnConst: unification (incomplete) [#CLICKHOUSE-3150].
* ColumnConst: unification (incomplete) [#CLICKHOUSE-3150].
* ColumnConst: unification (incomplete) [#CLICKHOUSE-3150].
* ColumnConst: unification (incomplete) [#CLICKHOUSE-3150].
* Fixed error in ColumnArray::replicateGeneric [#CLICKHOUSE-3150].
* ColumnConst: unification (incomplete) [#CLICKHOUSE-3150].
* ColumnConst: unification (incomplete) [#CLICKHOUSE-3150].
* ColumnConst: unification (incomplete) [#CLICKHOUSE-3150].
* ColumnConst: unification (incomplete) [#CLICKHOUSE-3150].
* ColumnConst: unification (incomplete) [#CLICKHOUSE-3150].
* ColumnConst: unification (incomplete) [#CLICKHOUSE-3150].
* ColumnConst: unification (incomplete) [#CLICKHOUSE-3150].
* ColumnConst: unification (incomplete) [#CLICKHOUSE-3150].
* ColumnConst: unification (incomplete) [#CLICKHOUSE-3150].
* ColumnConst: unification (incomplete) [#CLICKHOUSE-3150].
* ColumnConst: unification (incomplete) [#CLICKHOUSE-3150].
* ColumnConst: unification (incomplete) [#CLICKHOUSE-3150].
* ColumnConst: unification (incomplete) [#CLICKHOUSE-3150].
2017-07-21 09:35:58 +03:00
Nikolai Kochetov
75be0b81d8
removed typeid_cast from IColumn.h
2017-07-13 23:58:19 +03:00
Marek Vavruša
ff73394124
PKCondition: infer index use with pk subexpression
...
By default only constraints explicitly matching
primary key expression (or expression wrapped in
a monotonic function) are eligible for part and
range selection. So for example, if index is:
(toStartOfHour(dt), UserID)
Then a query such as this resorts to full scan:
SELECT count() FROM t WHERE dt = now()
Intuitively, only parts with toStartOfHour(now())
could be selected, but it is less trivial to prove.
The primary key currently can be wrapped in a chain
of monotonic functions, so following would work:
toStartOfHour(dt) = toStartOfHour(now()) AND dt = now()
It must be however explicitly stated, if we wanted
to infer that we’d have to know the inverse function,
and prove that the inverse function is monotonic
on given interval. This is not practical as
there is no inverse function that for example undos
rounding, it isn’t strictly monotonic.
There are however functions that don’t transform
output range and preserve monotonicity on the
complete input range, such as rounding or casts
to a same or wider numeric type. This eliminates
the need to find inverse function, as no check for monotonicity over arbitrary interval is needed,
and thus makes this optimisation possible.
2017-07-09 17:13:51 +03:00
Alexey Milovidov
782fe332b1
Miscellaneous [#CLICKHOUSE-31].
2017-06-13 07:13:54 +03:00
f1yegor
0882092c20
translate comments: functions
2017-05-27 17:45:25 +02:00
Alexey Milovidov
310736cd7e
Moved headers and sources to same place [#CLICKHOUSE-3].
2017-04-01 12:22:42 +03:00
