Commit Graph

10 Commits

Author SHA1 Message Date
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