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
Vitaliy Lyudvichenko
b46a2a6eab
Fixed infinite sleeping of low-priority queries. [#CLICKHOUSE-2]
2017-07-09 03:53:13 +03:00
Alexey Milovidov
4b31fd9a9c
Style [#CLICKHOUSE-2].
2017-07-08 19:09:32 +03:00
Alexey Milovidov
3ff4c8cf3e
Fixed errors in readme [#CLICKHOUSE-3].
2017-07-07 19:50:50 +03:00
Alexey Milovidov
4e2fb88469
Fixed bad file permission [#CLICKHOUSE-3].
2017-07-07 19:44:23 +03:00
Alexey Milovidov
65456fb39b
Fixed error on the website (tnx. Avriche) [#CLICKHOUSE-3]
2017-07-07 19:27:52 +03:00
Vitaliy Lyudvichenko
7150e9447a
Fixed multiIf in case of empty arguments. [#CLICKHOUSE-3119]
2017-07-07 17:42:37 +03:00
Nikolai Kochetov
2f08ba9e94
added FormatSettingsJSON.h
2017-07-06 18:11:12 +03:00
Guillaume Tassery
2ec96fe822
Make UUID as a strong type
2017-07-06 16:50:29 +02:00
Nikolai Kochetov
d6001618f0
disabled exception during overriding settings with same value in readonly mode [#CLICKHOUSE-3041]
2017-07-06 17:42:31 +03:00
robot-metrika-test
2d478cd371
Auto version update to [54248]
2017-07-05 21:47:14 +03:00
Liu Cong
08e43b149a
Fix a typo of 'Columns/ColumnVector.h': metod => method
2017-07-05 20:46:37 +03:00
Nikolai Kochetov
c99a9b1c55
moved FilterColumnsBlockInputStream implementation to .cpp [#CLICKHOUSE-3111]
2017-07-05 20:14:17 +03:00
alexey-milovidov
85bdb472ea
Update FilterColumnsBlockInputStream.h
2017-07-05 20:14:17 +03:00
alexey-milovidov
7bc0e40135
Update FilterColumnsBlockInputStream.h
2017-07-05 20:14:17 +03:00
Nikolai Kochetov
f1ec4cd863
added FilterColumnsBlockInputStream into StorageMerge [#CLICKHOUSE-3111]
2017-07-05 20:14:17 +03:00
robot-metrika-test
f1ce8c437b
Auto version update to [54247]
2017-07-05 19:42:46 +03:00
Alexey Milovidov
66638c4158
Fixed error in StorageDictionary [#CLICKHOUSE-2].
2017-07-05 19:36:45 +03:00
Guillaume Tassery
c6a5083419
Fix comparison of UInt128 to Float64
2017-07-05 18:29:16 +02:00
Nikolai Kochetov
13b275a174
updated FormatSettingsJSON
2017-07-05 19:28:57 +03:00
robot-metrika-test
25e9a1f7a6
Auto version update to [54246]
2017-07-05 18:22:35 +03:00
Nikolay Volosatov
e7886ee79a
fix ipv6 for server docker image
2017-07-05 17:11:22 +03:00
Guillaume Tassery
b90734920e
Adapt UInt128 operator
2017-07-05 12:09:24 +02:00
Nikolai Kochetov
ebbca0001f
added FormatSettingsJSON [#CLICKHOUSE-3060]
2017-07-04 19:26:38 +03:00
Guillaume Tassery
aeeb81fadf
Rename field in UInt128
2017-07-04 18:10:36 +02:00
Alexey Milovidov
4852863238
Added a note about testing versions [#CLICKHOUSE-2].
2017-07-04 15:53:50 +03:00
Alexey Milovidov
032d12d431
Fixed translation error [#CLICKHOUSE-2].
2017-07-04 15:46:31 +03:00
Guillaume Tassery
cba9815981
Change Uuid to UUID datatype and make UInt128 a generic type
2017-07-04 12:42:53 +02:00
Alexey Milovidov
06f343c89e
Misc [#CLICKHOUSE-3115].
2017-07-04 00:04:40 +03:00
Alexey Milovidov
727ce48c23
Fixed error with selecting number of threads for distributed query processing [#CLICKHOUSE-3115].
2017-07-04 00:04:10 +03:00
Alexey Milovidov
15cf838250
Cosmetics [#CLICKHOUSE-2]
2017-07-03 21:29:56 +03:00
Alexey Milovidov
c170b6f0d2
Removed useless code [#CLICKHOUSE-3111].
2017-07-03 20:34:27 +03:00
Guillaume Tassery
d6ab06437a
Remove mention of UUID type for dictonnary
2017-07-03 18:08:32 +02:00
Alexey Milovidov
5a015a1475
Misc fixes after merge [#CLICKHOUSE-3].
2017-07-03 17:17:46 +03:00
Alexey Milovidov
a38bf1cbb3
Fixed bad code after merge [#CLICKHOUSE-3].
2017-07-03 17:16:20 +03:00
Alexey Milovidov
320b1e635b
Fixed build after merge [#CLICKHOUSE-3].
2017-07-03 17:14:44 +03:00
Alexey Milovidov
43daa720a4
Fixed build after merge [#CLICKHOUSE-3].
2017-07-03 17:09:32 +03:00
Marek Vavruša
d27bed228b
Parser: fix CREATE VIEW IF EXISTS #934
...
The else branch forgot to consume whitespace after
CREATE token, and after VIEW token.
2017-07-03 17:01:43 +03:00
Maxim Fridental
e30c9242bc
Implement functions findClusterIndex and findClusterValue.
2017-07-03 17:01:21 +03:00
BayoNet
f17c3afef7
New part "Server configuration parameters" of the document is added.
...
Other changes are made related to this new part.
2017-07-03 17:00:45 +03:00
Ilya Khomutov
afdd286846
fix typo in russian docs
2017-07-03 17:00:03 +03:00
Alexey Milovidov
65cde992f5
Merge branch 'master' of github.com:yandex/ClickHouse
2017-07-02 23:51:40 +03:00
Keiji Yoshida
71ac924572
Fix a dead link on website/index.html
2017-07-01 18:42:56 +03:00
Guillaume Tassery
525851ec68
sync master
2017-06-30 22:21:42 +02:00
Guillaume Tassery
1231952fca
Implement UUID type and toUuid function
2017-06-30 22:01:27 +02:00
Alexey Zatelepin
9de4d8facb
allow loading missing setting from config [#CLICKHOUSE-3091]
2017-06-28 19:56:35 +03:00
Alexey Milovidov
21c9ede548
Fixed garbage [#CLICKHOUSE-2].
2017-06-28 16:20:57 +03:00
robot-metrika-test
44cdfb4c76
Auto version update to [54244]
2017-06-28 15:35:06 +03:00
Alexey Zatelepin
7cf413dea8
Revert "Raised up limit on max size of parts to merge [#CLICKHOUSE-3091]."
...
This reverts commit 425156e32c
2017-06-28 15:32:52 +03:00
Alexey Milovidov
2b67782845
Applied clang-format [#CLICKHOUSE-2].
2017-06-28 15:30:23 +03:00
