Tsarkova Anastasia
12c8014e5c
Conditional computations.
2018-04-24 09:16:39 +02:00
Alexey Milovidov
c44108d5eb
Allow to CAST Nullable type to non-Nullable as long as there are no NULL values #1947
2018-02-23 00:20:02 +03:00
Alexey Milovidov
95d2d68c7d
Header in every stream: development [#CLICKHOUSE-2]
2018-02-18 05:22:32 +03:00
Alexey Milovidov
55c969d073
Added test [#CLICKHOUSE-2]
2018-02-12 03:55:46 +03:00
Alexey Milovidov
95bc1ffd2e
Added functions parseDateTimeBestEffort, parseDateTimeBestEffortOrZero, parseDateTimeBestEffortOrNull [#CLICKHOUSE-2]
2018-02-12 02:57:07 +03:00
Alexey Milovidov
c704f8b10c
Fixed build #1879
2018-02-09 22:32:12 +03:00
Nikolai Kochetov
27179b375a
removed prerequisites [#CLICKHOUSE-3550]
2018-02-08 20:18:52 +03:00
Nikolai Kochetov
583ff32fe8
changed IFunction
2018-02-08 20:18:15 +03:00
Nikolai Kochetov
0d3ba65e0e
fixed cast for arrays [#CLICKHOUSE-3504]
2018-01-10 22:52:39 +03:00
Alexey Milovidov
454de9243e
Fixed build [#CLICKHOUSE-2]
2017-12-25 10:18:27 +03:00
Alexey Milovidov
d899d3f8f5
Added functions toNumberOrNull from String argument #1322
2017-12-25 08:22:33 +03:00
Alexey Milovidov
de8e504e02
Miscellaneous [#CLICKHOUSE-2].
2017-12-25 07:10:43 +03:00
Alexey Milovidov
f7838e7e39
Miscellaneous [#CLICKHOUSE-2].
2017-12-25 07:09:48 +03:00
Alexey Milovidov
8ff93487e3
Miscellaneous [#CLICKHOUSE-2].
2017-12-25 07:01:46 +03:00
Alexey Milovidov
a168c77ee4
Proper conversions from String to Nullable types if the value cannot be parsed: development #1322
2017-12-25 05:57:54 +03:00
Alexey Milovidov
0972d7586a
Added support for toQuarter, toRelativeQuarterNum functions. Enabled toRelativeHour/Minute/Second for Date arguments. Made function 'now' case insensitive. Added function 'dateDiff' that is needed for ODBC driver [#CLICKHOUSE-2].
2017-12-22 04:54:29 +03:00
Alexey Milovidov
c5d5296889
Miscellaneous [#CLICKHOUSE-2].
2017-12-18 07:07:26 +03:00
Alexey Milovidov
f95ddfce10
Make DataTypes totally immutable [#CLICKHOUSE-2].
2017-12-18 04:11:48 +03:00
Alexey Milovidov
45805a367f
Better semantic of sharing columns: development [#CLICKHOUSE-2].
2017-12-16 07:59:32 +03:00
Alexey Milovidov
7284a64740
Better semantic of sharing columns: development [#CLICKHOUSE-2].
2017-12-16 00:32:25 +03:00
Alexey Milovidov
401fd2d6d8
Better semantic of sharing columns: development [#CLICKHOUSE-2].
2017-12-15 05:36:40 +03:00
Alexey Milovidov
fb38ef9a8e
Better semantic of sharing columns: development [#CLICKHOUSE-2].
2017-12-14 06:56:56 +03:00
Alexey Milovidov
bed2d644e6
Merge remote-tracking branch 'origin/master' into cow_columns
2017-12-14 04:44:35 +03:00
Alexey Milovidov
f3bb24a3bf
Better semantic of sharing columns: development [#CLICKHOUSE-2].
2017-12-14 04:43:19 +03:00
Alexey Milovidov
0dd0d76b19
Added changes from proller [#CLICKHOUSE-2].
2017-12-14 00:09:31 +03:00
Alexey Milovidov
c3015bece3
Miscellaneous [#CLICKHOUSE-2].
2017-12-11 01:44:04 +03:00
Alexey Milovidov
6a568ab692
Technically allowed empty arrays of unspecified type [#CLICKHOUSE-2].
2017-12-09 23:56:53 +03:00
Alexey Milovidov
dd40e00f86
Fixed error [#CLICKHOUSE-2]
2017-12-09 19:17:37 +03:00
Alexey Milovidov
291467647a
Cleanup semantics of data types [#CLICKHOUSE-2].
2017-12-09 19:17:37 +03:00
Alexey Milovidov
3def5f03f5
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
c4a09a11f4
Simplification of Nullable [#CLICKHOUSE-2]
2017-12-08 06:52:33 +03:00
Alexey Milovidov
741a6e0066
Simplification of Nullable [#CLICKHOUSE-2]
2017-12-08 03:50:25 +03:00
Alexey Milovidov
be72c247fe
Simplification of Nullable [#CLICKHOUSE-2]
2017-12-07 15:09:55 +03:00
Alexey Milovidov
c748493a86
Better [#CLICKHOUSE-2].
2017-12-02 05:47:12 +03:00
proller
0d3c4f4d67
Core/FieldVisitors.h -> Common/FieldVisitors.h
...
Core/Progress.h -> IO/Progress.h
tests: sudo --non-interactive
Fix freebsd link
2017-11-24 16:55:31 +03:00
Alexey Milovidov
8517251ebd
Improved performance of toString function of Date and DateTime arguments [#CLICKHOUSE-2].
2017-11-18 02:45:49 +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
7a876fddb9
Attempt to fix build with gcc 6 [#CLICKHOUSE-2].
2017-10-30 17:00:47 +03:00
Alexey Milovidov
bed7b531a1
INTERVAL operators: development [#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
86c46ad1bd
Unification [#CLICKHOUSE-2].
2017-09-15 15:16:12 +03:00
Alexey Milovidov
bfdc108a08
Cleaning old code [#CLICKHOUSE-2].
2017-07-25 01:44:13 +03:00
Alexey Milovidov
ee81d53bd5
Functions simplification [#CLICKHOUSE-2].
2017-07-25 01:44:13 +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
alexey-milovidov
b64b243a73
Merge pull request #945 from YiuRULE/master
...
Implement natively uuid type in Clickhouse
2017-07-10 07:00:45 +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
Guillaume Tassery
2ec96fe822
Make UUID as a strong type
2017-07-06 16:50:29 +02:00
Guillaume Tassery
cba9815981
Change Uuid to UUID datatype and make UInt128 a generic type
2017-07-04 12:42:53 +02:00
Guillaume Tassery
d6ab06437a
Remove mention of UUID type for dictonnary
2017-07-03 18:08:32 +02:00
