owner stringclasses 15
values | repo stringclasses 16
values | id int64 116k 4.2B | issue_number int32 1 155k | author stringlengths 0 39 | body stringlengths 1 262k | created_at timestamp[us]date 2000-06-06 02:40:44 2026-04-08 05:18:21 | updated_at timestamp[us]date 2000-06-06 02:40:44 2026-04-08 05:18:21 | reactions unknown | author_association stringclasses 7
values |
|---|---|---|---|---|---|---|---|---|---|
ClickHouse | ClickHouse | 224,789,695 | 1 | alexey-milovidov | Потеряна функциональность быстрого убиения по повторному нажатию Ctrl+C (очень важно).
| 2016-06-09T03:07:50 | 2016-06-09T03:07:50 | {} | MEMBER |
ClickHouse | ClickHouse | 224,847,159 | 1 | PKartaviy | А такая функциональность была? в демонах только печаталось сообщение "Received second termination signal"
| 2016-06-09T09:39:50 | 2016-06-09T09:39:50 | {} | CONTRIBUTOR |
ClickHouse | ClickHouse | 224,850,275 | 1 | PKartaviy | а если вызвать два раза рестарт, то тоже девятка? вообщем стоит обсудить
| 2016-06-09T09:54:07 | 2016-06-09T09:54:07 | {} | CONTRIBUTOR |
ClickHouse | ClickHouse | 225,088,976 | 1 | alexey-milovidov | > А такая функциональность была? в демонах только печаталось сообщение "Received second termination signal"
Это довольно забавно - такая функциональность была в clickhouse-server, но не было в других демонах Метрики. И сейчас мне её не хватает.
> а если вызвать два раза рестарт, то тоже девятка? вообщем стоит обсудит... | 2016-06-10T04:11:20 | 2016-06-10T04:11:20 | {} | MEMBER |
ClickHouse | ClickHouse | 225,139,195 | 1 | alexey-milovidov | За счёт того, что уже не ждём сигнал, и для него нет обработчика.
| 2016-06-10T09:39:22 | 2016-06-10T09:39:22 | {} | MEMBER |
ClickHouse | ClickHouse | 226,180,653 | 5 | alexey-milovidov | Thank you!
But fix was already committed just now: https://github.com/yandex/ClickHouse/commit/ffb1672f6839c63cdde1835c35b78eb20edc4ddc
| 2016-06-15T13:04:51 | 2016-06-15T13:04:51 | {} | MEMBER |
ClickHouse | ClickHouse | 226,363,122 | 7 | alexey-milovidov | When you `SELECT *`, you select Users column, which have (unusual) type `AggregateFunction(uniq, String)`.
Something is wrong with transferring values of this type to client and it triggers a bug.
By the way, if it works correctly, it would display serialized state of aggregate function in binary form - not very infor... | 2016-06-16T01:08:36 | 2016-06-16T01:08:36 | {} | MEMBER |
ClickHouse | ClickHouse | 226,540,397 | 13 | bamx23 | Sure! Done
| 2016-06-16T16:33:04 | 2016-06-16T16:33:04 | {} | CONTRIBUTOR |
ClickHouse | ClickHouse | 226,587,836 | 14 | ei-grad | +1 It would be great to see elasticsearch in official benchmarks, I'd probably have some time next week to add it, if nobody will do that before me...
@alexey-milovidov что нужно подготовить, чтобы кто-нибудь потом мог запустить бенчмарк для эластика на том же железе что остальные? я к вам могу в офисе зайти если что ... | 2016-06-16T19:26:09 | 2016-06-16T19:26:09 | {} | CONTRIBUTOR |
ClickHouse | ClickHouse | 226,602,251 | 14 | kk00ss | I've spent some time thinking how to represent data in ElasticSearch in the best way. And came up with conclusion that similar denormalization is possible in other systems (any DBMS probably) to implement manually, but it wouldn't be fair, in my opinion, because analytical queries are unknown in advance.
Some queries ... | 2016-06-16T20:22:04 | 2016-06-16T20:22:04 | {} | NONE |
ClickHouse | ClickHouse | 226,614,545 | 14 | alexey-milovidov | > @alexey-milovidov что нужно подготовить, чтобы кто-нибудь потом мог запустить бенчмарк для эластика на том же железе что остальные? я к вам могу в офисе зайти если что с вопросами? вижу dbms/benchmarks, но не совсем понятно с чего начать вообще :-)
Напишу в личку, где можно взять данные для бенчмарка и на каком серв... | 2016-06-16T21:08:55 | 2016-06-16T21:08:55 | {} | MEMBER |
ClickHouse | ClickHouse | 226,614,682 | 17 | shinguz | Data can be provided, structure as well when you tell me how.
| 2016-06-16T21:09:28 | 2016-06-16T21:09:28 | {} | NONE |
ClickHouse | ClickHouse | 226,620,174 | 12 | jalateras | @alexey-milovidov is there a IRC channel or anywhere here you folks hang. Really interested in giving this a good test run over the next few weeks.
| 2016-06-16T21:32:16 | 2016-06-16T21:32:16 | {} | NONE |
ClickHouse | ClickHouse | 226,621,046 | 12 | alexey-milovidov | No IRC.
Feel free to ask (even short/simple) questions on [email protected] and I will try to answer quickly.
| 2016-06-16T21:35:56 | 2016-06-16T21:35:56 | {} | MEMBER |
ClickHouse | ClickHouse | 226,643,260 | 18 | alexey-milovidov | > -"Распределённая сортировка является основной причиной тормозов при выполнении несложных map-reduce задач."
> +"Распределённая сортировка является основной причиной долгого выполнения при выполнении несложных map-reduce задач."
Не очевидно, что это лучше. "Тормоза" - сленг, но его все знают.
> -"Впрочем, производит... | 2016-06-16T23:32:03 | 2016-06-16T23:37:57 | {} | MEMBER |
ClickHouse | ClickHouse | 226,663,860 | 18 | syaroslavtsev | -"Вы можете прервать длинный запрос, нажав Ctrl+C. При этом вам всё-равно придётся чуть-чуть подождать, пока сервер остановит запрос. На некоторых стадиях выполнения, запрос невозможно прервать. Если вы не дождётесь и нажмёте Ctrl+C второй раз, то клиент будет завершён."
+"Вы можете прервать длинный запрос, нажав Ctrl+... | 2016-06-17T02:13:41 | 2016-06-17T02:13:41 | {} | NONE |
ClickHouse | ClickHouse | 226,741,223 | 17 | DieHertz | Not necessarily, the server continues working, stack trace is provided for your convenience of debugging.
| 2016-06-17T10:59:06 | 2016-06-17T10:59:06 | {} | CONTRIBUTOR |
ClickHouse | ClickHouse | 226,751,775 | 20 | matthiasg | it did find the system requirements stating SSE 4,2 as required. Sorry skipped that before.
```
System requirements
This is not a cross-platform system. It requires Linux Ubuntu Precise (12.04) or newer, x86_64 architecture with SSE 4.2 instruction set.
To test for SSE 4.2 support, do
grep -q sse4_2 /proc/cpuinfo && e... | 2016-06-17T12:02:00 | 2016-06-17T12:02:00 | {} | NONE |
ClickHouse | ClickHouse | 226,715,310 | 14 | dedok | @ei-grad готовый есть, но мне интересно на другом дата сете попробовать, с сложными join'ми.
| 2016-06-17T08:48:29 | 2016-06-17T17:55:01 | {
"laugh": 1
} | NONE |
ClickHouse | ClickHouse | 226,837,960 | 14 | dedok | @bogdanovich fair enough.
| 2016-06-17T17:57:22 | 2016-06-17T17:57:22 | {} | NONE |
ClickHouse | ClickHouse | 226,841,496 | 14 | kk00ss | ES could be better at filtering IMHO, for constraints like SomeID == 123 or SomeField == "abcd".
| 2016-06-17T18:11:42 | 2016-06-17T18:11:42 | {} | NONE |
ClickHouse | ClickHouse | 226,849,297 | 20 | alexey-milovidov | So, we need to modify check in init script.
The most quick way is to remove this fragment:
```
# On x86_64, check for required instruction set.
if uname -mpi | grep -q 'x86_64'; then
if ! grep -q 'sse4_2' /proc/cpuinfo; then
# On KVM, cpuinfo could falsely not report SSE 4.2 support, so skip t... | 2016-06-17T18:42:02 | 2016-06-17T18:42:02 | {
"+1": 1
} | MEMBER |
ClickHouse | ClickHouse | 226,853,676 | 17 | alexey-milovidov | Probably better to disable stack trace by default, as it was done for clickhouse-client (added `--stacktrace` option).
| 2016-06-17T19:00:19 | 2016-06-17T19:00:19 | {} | MEMBER |
ClickHouse | ClickHouse | 226,865,860 | 21 | alexey-milovidov | All CPUs with AVX also have SSE4.
| 2016-06-17T19:52:13 | 2016-06-17T19:52:13 | {} | MEMBER |
ClickHouse | ClickHouse | 226,952,422 | 23 | alexey-milovidov | DieHertz, you are welcome too.
To translate all comments is a difficult task: about one month of work (really longer).
Today we have alternatives: to get done some important tasks (for example, compatibility of SQL dialect for JOINs) or start to translate comments.
Translation of comments is important task, but if we... | 2016-06-18T16:47:56 | 2016-06-18T16:47:56 | {} | MEMBER |
ClickHouse | ClickHouse | 227,000,827 | 14 | synhershko | Comparing ClickHouse to Elasticsearch would be comparing oranges to apples. One is a columnar store and the other is a document-based search server.
| 2016-06-19T14:40:02 | 2016-06-19T14:40:02 | {} | NONE |
ClickHouse | ClickHouse | 227,013,160 | 25 | alexey-milovidov | Everything is fine, thanks!
| 2016-06-19T18:40:42 | 2016-06-19T18:40:42 | {} | MEMBER |
ClickHouse | ClickHouse | 227,015,476 | 14 | bogdanovich | @synhershko Elasticsearch gets promoted as an analytics solution too.
| 2016-06-19T19:25:23 | 2016-06-19T19:25:31 | {} | NONE |
ClickHouse | ClickHouse | 227,060,465 | 20 | matthiasg | @alexey-milovidov .. there is indeed a VM issue .. https://github.com/joyent/smartos-live/issues/647#event-696349073 , its been filed for correction.
Nonetheless thanks for pointing out where to look. i will make a change there until the vm is behaving correctly...
| 2016-06-20T06:33:03 | 2016-06-20T06:33:03 | {} | NONE |
ClickHouse | ClickHouse | 227,277,240 | 19 | alexey-milovidov | Спасибо, исправил!
https://github.com/yandex/ClickHouse/commit/2fbf85a68207cdb205b1a04e7e495fe4d07dd453
При желании, можете сразу отправлять в виде pull request (а то здесь я не сразу разглядел изменения).
| 2016-06-20T21:36:37 | 2016-06-20T21:36:37 | {} | MEMBER |
ClickHouse | ClickHouse | 227,320,573 | 29 | ggodik | @alexey-milovidov Спасибо за быстрый ответ
Do you see any benefits to using the C++ API vs going over http. Is the TCP interface somehow more efficient, less chatty, etc?
| 2016-06-21T01:58:31 | 2016-06-21T01:58:31 | {} | NONE |
ClickHouse | ClickHouse | 227,453,343 | 30 | alexey-milovidov | > Initially I thought that the primary key must contain at least two columns so I created a table with constant expression in primary key tuple with this query
You could specify one column (in parentheses or without) as primary key.
> However this query causes ClickHouse to throw Segmentation fault and exits ungracef... | 2016-06-21T14:15:56 | 2016-06-21T14:27:33 | {} | MEMBER |
ClickHouse | ClickHouse | 227,461,932 | 29 | alexey-milovidov | > Do you see any benefits to using the C++ API vs going over http. Is the TCP interface somehow more efficient, less chatty, etc?
There are some benefits, but (I think) not crucial.
| 2016-06-21T14:43:06 | 2016-06-21T14:43:06 | {} | MEMBER |
ClickHouse | ClickHouse | 227,871,348 | 14 | alexey-milovidov | In terms of capabilities, ClickHouse support INNER, LEFT, RIGHT, FULL OUTER
(and also CROSS JOIN).
For INNER, LEFT, RIGHT, FULL, only equality JOIN relation is supported.
Also, syntax for JOINs in ClickHouse is not compatible to standard SQL and too explicit: only two tables could be JOINed, it is recommended to write... | 2016-06-22T20:46:59 | 2016-06-22T20:46:59 | {} | MEMBER |
ClickHouse | ClickHouse | 228,109,499 | 31 | alexey-milovidov | > Shark for Spark is deprecated. Spark SQL is actually a replacement of Shark so I am not sure if both should be mentioned.
Ok. Shark could be removed from text, or added note about obsoleteness... but it doesn't matter much.
> Also, I did not get what YT is referring to. Is it yt-project
> In any case shall a link b... | 2016-06-23T16:42:07 | 2016-06-23T16:42:07 | {} | MEMBER |
ClickHouse | ClickHouse | 228,630,116 | 34 | alexey-milovidov | Ok. Everything is alright.
| 2016-06-26T23:38:32 | 2016-06-26T23:38:32 | {} | MEMBER |
ClickHouse | ClickHouse | 228,650,010 | 35 | alexey-milovidov | https://clickhouse.yandex/tutorial.html
| 2016-06-27T04:06:35 | 2016-06-27T04:06:35 | {} | MEMBER |
ClickHouse | ClickHouse | 229,054,804 | 36 | blackbass1988 | toMonday exists
| 2016-06-28T13:51:15 | 2016-06-28T13:51:15 | {} | NONE |
ClickHouse | ClickHouse | 229,331,376 | 37 | alexey-milovidov | Ok.
| 2016-06-29T11:38:01 | 2016-06-29T11:38:01 | {} | MEMBER |
ClickHouse | ClickHouse | 229,645,384 | 38 | alexey-milovidov | GROUP BY doesn't take into account order of data in table, it keeps in memory all states of aggregate functions even when GROUP BY is by primary key.
The problem could be solved in following ways:
1. Split query to several parts by ranges of uid:
`WHERE uid < '8'`
`WHERE uid >= '8'`
and do UNION ALL.
(BTW ... | 2016-06-30T12:36:09 | 2016-06-30T12:36:09 | {} | MEMBER |
ClickHouse | ClickHouse | 229,648,853 | 38 | karteek-gamooga | Thanks Alexey for your quick response. The uid is a string because it is typically a email id or some other unique identifier. Your first solution could work, I will try that out. The pattern matching is a little more complex than what sequenceMatch provides so i just quickly wrote a custom function. Regarding max_byte... | 2016-06-30T12:52:11 | 2016-06-30T12:52:11 | {} | NONE |
ClickHouse | ClickHouse | 229,751,554 | 39 | alexey-milovidov | Test 00222_sequence_aggregate_function_family is broken.
| 2016-06-30T18:43:14 | 2016-06-30T18:43:14 | {} | MEMBER |
ClickHouse | ClickHouse | 230,339,757 | 43 | alexey-milovidov | Thanks, I will try to investigate, what's going on.
By the way, we don't use `make install` directly for deployment.
It is used just to place part of content into debian/tmp directory while building debian package.
There is a way to build on Ubuntu and install on any other distribution, look here:
https://github.com/... | 2016-07-04T18:37:09 | 2016-07-04T18:37:09 | {} | MEMBER |
ClickHouse | ClickHouse | 230,620,220 | 43 | alexey-milovidov | We are using RELWITHDEBINFO for production (fat binaries is minor issue).
Yes, I see compile errors when building with Release type. I'll try to fix them.
| 2016-07-05T22:22:29 | 2016-07-05T22:22:29 | {} | MEMBER |
ClickHouse | ClickHouse | 230,637,578 | 43 | alexey-milovidov | https://github.com/yandex/ClickHouse/commit/fa5e66c1fc7a982e1cfdc8ba7ce5a2ccc593e92b
(Warnings was in 3rd-party library)
| 2016-07-06T00:01:43 | 2016-07-06T00:01:43 | {} | MEMBER |
ClickHouse | ClickHouse | 230,762,756 | 43 | code-of-kpp | 103.2M /usr/bin/clickhouse-benchmark
103.3M /usr/bin/clickhouse-client
104.0M /usr/bin/clickhouse-server
3.8M /usr/bin/compressor
4.2M /usr/bin/config-processor
3.1M /usr/bin/corrector_utf8
still looks bigger, than it deb files, but 5 times smaller than before
But queries don't work. `SELECT 1` and `CREAT... | 2016-07-06T12:55:23 | 2016-07-06T12:55:23 | {} | CONTRIBUTOR |
ClickHouse | ClickHouse | 225,119,956 | 1 | PKartaviy | Засчет чего она достигалась. я не могу найти код, который бы это делал
| 2016-06-10T08:13:00 | 2016-06-10T08:13:00 | {} | CONTRIBUTOR |
ClickHouse | ClickHouse | 226,179,167 | 5 | smagellan | here is detailed error info.
[ 56%] Building CXX object dbms/CMakeFiles/dbms.dir/src/Dictionaries/ComplexKeyCacheDictionary.cpp.o
In file included from /tmp/clickhouse/ClickHouse/dbms/src/Dictionaries/ComplexKeyCacheDictionary.cpp:1:0:
/tmp/clickhouse/ClickHouse/dbms/include/DB/Dictionaries/ComplexKeyCacheDictionary.h... | 2016-06-15T12:58:31 | 2016-06-15T12:59:30 | {} | NONE |
ClickHouse | ClickHouse | 226,350,266 | 11 | alexey-milovidov | We have not support for UDFs yet for several reasons:
1. To not fixate on some API. Internal interfaces are subjects to change. We want to have the ability to "break" the code.
2. Interface of ordinary functions is quite complex: due to vector engine, functions are dispatched not on single values, but on arrays of valu... | 2016-06-15T23:34:29 | 2016-06-15T23:34:29 | {
"+1": 7
} | MEMBER |
ClickHouse | ClickHouse | 226,350,868 | 9 | alexey-milovidov | Very promising.
Also histogram could be calculated on top of t-digest algorithm.
| 2016-06-15T23:38:23 | 2016-06-15T23:38:23 | {} | MEMBER |
ClickHouse | ClickHouse | 226,470,663 | 12 | DieHertz | You shall not. Corresponding includes are mentioned in server's **config.xml** and **users.xml** and are optional AFAIK.
To be more precise, **_clickhouse_remote_servers**_ may be specified if the user intends to define some remote machines/clusters for using them with **StorageDistributed**, **ReplicatedMergeTree**, ... | 2016-06-16T12:28:17 | 2016-06-16T12:42:11 | {
"+1": 2
} | CONTRIBUTOR |
ClickHouse | ClickHouse | 226,531,239 | 13 | alexey-milovidov | Could you please recreate your pull request?
Because commit "Merge commit '942db72153ba9312fa17b4b2fb786c2ce3e1140e' into METR-19660" and all commits before were wrong and I have done reset.
| 2016-06-16T16:00:50 | 2016-06-16T16:00:50 | {} | MEMBER |
ClickHouse | ClickHouse | 226,597,775 | 12 | alexey-milovidov | Yes, these messages are just notices.
| 2016-06-16T20:04:59 | 2016-06-16T20:04:59 | {} | MEMBER |
ClickHouse | ClickHouse | 226,609,926 | 14 | dedok | @ei-grad я тут на этих выходных планирую погонять на AWS'е, план такой:
Делаешь load (cli у Click'а и ES) данных (я планирую dump вики взять) ну и бомбишь join'ы в кучу потоков в ES через http и С++ демона Click'а - api там вроде понятное.
Думаю для тестовых join, union идеально подойдут категории википедии.
P.S. Може... | 2016-06-16T20:50:52 | 2016-06-16T20:54:17 | {} | NONE |
ClickHouse | ClickHouse | 226,613,102 | 14 | ei-grad | Есть же уже готовый бенчмарк в dbms/benchmark, как я понимаю это он https://clickhouse.yandex/benchmark.html, без всяких join'ов, чисто под стандартный паттерн аналитики по событиям в веб/мобайл приложениях, под эластик отлично ложится, только надо загрузчик данных и запросы написать.Но было бы клево иметь возможность ... | 2016-06-16T21:03:15 | 2016-06-16T21:03:15 | {} | CONTRIBUTOR |
ClickHouse | ClickHouse | 226,617,896 | 17 | alexey-milovidov | Probably your dump has many INSERT queries?
You should create dump with only data, or with single query and then all data.
As in example here:
https://clickhouse.yandex/reference_en.html#HTTP%20interface
(after words "Creating a table")
It because data is parsed with stream format parser, not with SQL-parser, as desc... | 2016-06-16T21:22:53 | 2016-06-16T21:22:53 | {} | MEMBER |
ClickHouse | ClickHouse | 226,623,363 | 17 | shinguz | you are right. I tried to import a mysqldump from our foodmart example schema to play around a bit. there are/were also many other things broken (in our dump). But: a stacktrace is a non caught exit and thus a bug.
| 2016-06-16T21:46:12 | 2016-06-16T21:46:12 | {} | NONE |
ClickHouse | ClickHouse | 226,644,146 | 18 | alexey-milovidov | https://github.com/yandex/ClickHouse/commit/d19d3a27da2ece3c49a8afbf8c5772a7b74df440
| 2016-06-16T23:37:45 | 2016-06-16T23:37:45 | {} | MEMBER |
ClickHouse | ClickHouse | 226,663,224 | 14 | buremba | It would be great if you could write your posts in english because we don't know russian. :)
| 2016-06-17T02:08:13 | 2016-06-17T02:08:13 | {
"+1": 13,
"confused": 2
} | NONE |
ClickHouse | ClickHouse | 226,664,132 | 18 | syaroslavtsev | -"Принимает строку, число, дату или дату-с-временем. Возвращает строку, содержащую шестнадцатиричное представление аргумента. Используются заглавные буквы A-F. Не используются префиксы %%0x%% и суффиксы %%h%%. Для строк просто все байты кодируются в виде двух шестнадцатиричных цифр. Числа выводятся в big endian ("челов... | 2016-06-17T02:16:22 | 2016-06-17T02:16:22 | {} | NONE |
ClickHouse | ClickHouse | 226,665,105 | 18 | syaroslavtsev | -"Эта функция обычно используется совместо с ARRAY JOIN. Она позволяет, после применения ARRAY JOIN, посчитать что-либо только один раз для каждого массива. Пример:"
+"Эта функция обычно используется совместно с ARRAY JOIN. Она позволяет, после применения ARRAY JOIN, посчитать что-либо только один раз для каждого масси... | 2016-06-17T02:25:08 | 2016-06-17T02:25:08 | {} | NONE |
ClickHouse | ClickHouse | 226,752,807 | 14 | ei-grad | @buremba sorry, @dedok wants to proceed with his own test case containing complex join queries, and looking how clickhouse and elasticsearch deal with them.
I think it doesn't make a good sense, since nor ES, nor ClickHouse, are not designed to be good in such operations. Also, there is a good official benchmark (http... | 2016-06-17T12:08:33 | 2016-06-17T12:10:34 | {} | CONTRIBUTOR |
ClickHouse | ClickHouse | 226,818,346 | 14 | buremba | I think the only fair comparisons would be simple cardinality and group by queries.
| 2016-06-17T16:37:06 | 2016-06-17T16:37:06 | {} | NONE |
ClickHouse | ClickHouse | 226,846,955 | 20 | alexey-milovidov | Your CPU supports required instruction set:
http://ark.intel.com/ru/products/83356/Intel-Xeon-Processor-E5-2630-v3-20M-Cache-2_40-GHz
Probably it is VM issue: VM could report wrong flags in /proc/cpuinfo.
It even doesn't report sse3, ssse3...
2014 year CPU definitely has support for it.
| 2016-06-17T18:33:19 | 2016-06-17T18:33:19 | {} | MEMBER |
ClickHouse | ClickHouse | 226,853,025 | 20 | alexey-milovidov | How do we check for required instruction set without /proc/cpuinfo?
We could compile minimal program which using one of instructions and then look does it get 'Illegal instruction' signal. To do it without installed compiler, we could provide minimal program:
```
echo -n 'H4sICAwAW1cCA2Eub3V0AKt39XFjYmRkgAEmBjsGEI+H0Q... | 2016-06-17T18:57:41 | 2016-06-17T18:57:41 | {} | MEMBER |
ClickHouse | ClickHouse | 226,864,085 | 22 | alexey-milovidov | No, SELECTs from Distributed tables don't touch ZooKeeper.
| 2016-06-17T19:43:29 | 2016-06-17T19:43:29 | {} | MEMBER |
ClickHouse | ClickHouse | 226,867,564 | 21 | DieHertz | Concerning the initial question, SSE4.2 has some unique string-related instructions which are not present in AVX, thus "updating to AVX" is impossible is this regard.
However it may be interesting to implement runtime AVX code paths for functions which are currently vectorized using SSE2, potentially increasing theoret... | 2016-06-17T20:00:20 | 2016-06-17T20:00:20 | {} | CONTRIBUTOR |
ClickHouse | ClickHouse | 226,946,851 | 23 | DieHertz | You are welcome to study the code, translate commentaries and submit a pull request :-)
| 2016-06-18T15:00:19 | 2016-06-18T15:00:28 | {
"+1": 1,
"laugh": 1
} | CONTRIBUTOR |
ClickHouse | ClickHouse | 226,952,085 | 24 | alexey-milovidov | Example to load this dataset was unfinished, I was not loaded it.
I appreciate if someone going to help.
| 2016-06-18T16:41:32 | 2016-06-18T16:41:32 | {} | MEMBER |
ClickHouse | ClickHouse | 227,024,893 | 26 | duremar | subquery can't reference columns from outer query. correlated queries are impossible for now.
| 2016-06-19T22:42:17 | 2016-06-19T22:42:17 | {} | NONE |
ClickHouse | ClickHouse | 227,025,314 | 26 | alexey-milovidov | Added note about that to documentation: https://github.com/yandex/ClickHouse/commit/fa98bd6789aa474cbb1e9c7cf684b2773e94e626
> subqueries can only reference columns from the table system.one
And from other available tables too; but not from outside.
| 2016-06-19T22:51:41 | 2016-06-19T22:51:41 | {} | MEMBER |
ClickHouse | ClickHouse | 227,060,198 | 21 | matthiasg | really annoying that the intel ark pages are so utterly unclear on this topic. some show avx, some show sse4 and some show both. also sse4 and other features are not filterable unlike things such as socket type etc.
| 2016-06-20T06:31:14 | 2016-06-20T06:31:14 | {} | NONE |
ClickHouse | ClickHouse | 227,233,251 | 29 | alexey-milovidov | We have C++ API internally. Drawback is that it depends on (almost) whole ClickHouse codebase.
We could open it, but I am not sure, would it be appropriate solution.
Linking with whole ClickHouse is ugly.
Maybe, we could open it with many precautions statements.
| 2016-06-20T18:48:16 | 2016-06-20T18:48:16 | {} | MEMBER |
ClickHouse | ClickHouse | 227,277,649 | 19 | alexey-milovidov | На сайте обновится само через несколько минут.
| 2016-06-20T21:38:19 | 2016-06-20T21:38:19 | {} | MEMBER |
ClickHouse | ClickHouse | 227,294,470 | 19 | syaroslavtsev | Добрый день. К своему великому сожалению на данный момент нет возможности.
Есть несколько вопросов по продукту:
Есть спецификация на code convention для проекта и комментариям, Public CI
and deployment script for experiments without using docker, for example
vagrant?
Возможно у Вас есть или у Yandex планы в будущем по ... | 2016-06-20T22:56:27 | 2016-06-20T22:56:27 | {} | NONE |
ClickHouse | ClickHouse | 227,310,127 | 19 | alexey-milovidov | > Есть спецификация на code convention для проекта и комментариям
Есть. Только что добавил эту спецификацию в дерево проекта.
https://github.com/yandex/ClickHouse/blob/master/doc/style_ru.md
> Public CI
Есть только внутренний CI. Он поддерживается другой командой и не открыт.
> deployment script for experiments wit... | 2016-06-21T00:37:55 | 2016-06-21T00:37:55 | {} | MEMBER |
ClickHouse | ClickHouse | 227,498,279 | 18 | alexey-milovidov | Всё исправил.
| 2016-06-21T16:40:05 | 2016-06-21T16:40:05 | {} | MEMBER |
ClickHouse | ClickHouse | 227,506,307 | 30 | alexey-milovidov | Commited: https://github.com/yandex/ClickHouse/commit/b8ca97a891ac841144e43992333fe2fc89e9ca76
https://gist.github.com/alexey-milovidov/71c61a63aeca4b0da8ba2c2298315e1d
(Scheduled for next release. Releases are about once per week, irregularly.)
| 2016-06-21T17:08:12 | 2016-06-21T17:08:12 | {} | MEMBER |
ClickHouse | ClickHouse | 227,644,702 | 14 | matthiasg | This does bring up the question how good clickhouse is with joins... I saw it being mentioned it might not be good at that?
| 2016-06-22T05:06:31 | 2016-06-22T05:06:31 | {} | NONE |
ClickHouse | ClickHouse | 226,811,786 | 14 | bogdanovich | @dedok elasticsearch doesn't support complex join queries. Only for specified parent-child relationships (defined in mapping) where parent table is ideally should be a low cardinality table. And parent-child id relationships index is actually gets fully loaded into memory during these 'join queries'. I would say it doe... | 2016-06-17T16:09:45 | 2016-06-22T17:13:11 | {} | NONE |
ClickHouse | ClickHouse | 228,090,585 | 31 | alexey-milovidov | Great, thanks!
Please, do some cleanup of missing/excessive whitespaces here:
```
operation(partial reduce)
streaming mode,so can
In 2014-2016 YT is to develop
sorting " functionality using
```
| 2016-06-23T15:37:35 | 2016-06-23T15:37:35 | {} | MEMBER |
ClickHouse | ClickHouse | 228,098,369 | 31 | Ngalstyan4 | Done,
A couple of points:
Shark for Spark is deprecated. Spark SQL is actually a replacement of Shark so I am not sure if both should be mentioned.
Also, I did not get what YT is referring to. Is it [yt-project](http://yt-project.org/)
In any case shall a link be added?
| 2016-06-23T16:02:34 | 2016-06-23T16:02:34 | {} | CONTRIBUTOR |
ClickHouse | ClickHouse | 228,448,974 | 31 | alexey-milovidov | Merged.
By the way, it is not Markdown.
Replaced links with
```
\[([^\]]+)\]\((http[^\)]+)\)
```
to
```
<a href="\2">\1</a>
```
| 2016-06-24T20:04:45 | 2016-06-24T20:04:45 | {} | MEMBER |
ClickHouse | ClickHouse | 228,449,292 | 31 | alexey-milovidov | https://github.com/yandex/ClickHouse/commit/708c6e532b570da561741cce55044501710fde75
| 2016-06-24T20:06:19 | 2016-06-24T20:06:19 | {} | MEMBER |
ClickHouse | ClickHouse | 228,451,200 | 7 | alexey-milovidov | > Something is wrong with transferring values of this type to client and it triggers a bug.
Fix is committed and scheduled for next release.
| 2016-06-24T20:15:37 | 2016-06-24T20:15:37 | {} | MEMBER |
ClickHouse | ClickHouse | 228,519,150 | 17 | alexey-milovidov | > disable stack trace by default
Committed, scheduled for next release.
| 2016-06-25T07:25:23 | 2016-06-25T07:25:23 | {} | MEMBER |
ClickHouse | ClickHouse | 228,600,896 | 33 | alexey-milovidov | Ok.
| 2016-06-26T13:15:28 | 2016-06-26T13:15:28 | {} | MEMBER |
ClickHouse | ClickHouse | 228,601,500 | 34 | alexey-milovidov | > Do you prefer a few Pull Requests with small changes or one PR with huge diff?
Doesn't matter, do what you prefer.
| 2016-06-26T13:31:10 | 2016-06-26T13:31:10 | {} | MEMBER |
ClickHouse | ClickHouse | 228,601,550 | 34 | flrnull | Ok, thanks.
| 2016-06-26T13:32:35 | 2016-06-26T13:32:35 | {} | CONTRIBUTOR |
ClickHouse | ClickHouse | 228,630,278 | 35 | alexey-milovidov | Thanks!
I will edit the text and publish to web site.
| 2016-06-26T23:42:32 | 2016-06-26T23:42:32 | {} | MEMBER |
ClickHouse | ClickHouse | 228,631,781 | 32 | alexey-milovidov | Is is umbrella issue.
Lets look at different possible features that are related to stored procedures.
1. User defined functions and aggregate functions.
Discussed here: https://github.com/yandex/ClickHouse/issues/11
2. User defined streaming transformations of data.
Like mapreduce. Definitely makes sense.
But ... | 2016-06-27T00:11:44 | 2016-06-27T00:11:44 | {
"+1": 1
} | MEMBER |
ClickHouse | ClickHouse | 228,749,971 | 32 | gotlium | My case: I have one realtime data table and once on day on background I insert all data from realtime table to persistent pre-calculated OLAP table. For this case will be super if I call from code simple procedure to calculate and insert data to OLAP table.
| 2016-06-27T13:46:44 | 2016-06-27T13:46:44 | {
"+1": 1
} | NONE |
ClickHouse | ClickHouse | 229,064,497 | 36 | alexey-milovidov | BTW it is intentionally named `toMonday`, not `toStartOfWeek`, because there are different rules about at what day week starts.
| 2016-06-28T14:22:57 | 2016-06-28T14:22:57 | {
"+1": 7
} | MEMBER |
ClickHouse | ClickHouse | 229,665,645 | 38 | alexey-milovidov | It means that memory usage for aggregate function sequenceMatch is not tracked correctly.
We have a task for it.
Message "std::bad_alloc" means "cannot allocate memory".
| 2016-06-30T13:56:25 | 2016-06-30T13:56:25 | {} | MEMBER |
ClickHouse | ClickHouse | 229,723,256 | 39 | alexey-milovidov | Ok.
| 2016-06-30T17:05:46 | 2016-06-30T17:05:46 | {} | MEMBER |
ClickHouse | ClickHouse | 229,723,571 | 38 | alexey-milovidov | Commited fix for accounting of used memory for aggregate function sequenceMatch.
Scheduled for next release.
| 2016-06-30T17:06:52 | 2016-06-30T17:06:52 | {} | MEMBER |
ClickHouse | ClickHouse | 229,984,294 | 41 | alexey-milovidov | It is for more easy deployment.
With static linking it has runtime dependencies only on libc.
To build ClickHouse on other distributions, there are several ways:
1. Build ICU, GLib2 from sources and use compiled static libraries (install to /usr/local as default: libraries is searched there).
2. Change static linking ... | 2016-07-01T16:01:04 | 2016-07-01T16:01:04 | {
"+1": 1
} | MEMBER |
ClickHouse | ClickHouse | 230,123,703 | 42 | alexey-milovidov | Already fixed.
Update to latest version, which is 1.1.53988 and is in debian repository.
| 2016-07-02T21:52:01 | 2016-07-02T21:52:01 | {} | MEMBER |
ClickHouse | ClickHouse | 230,123,727 | 42 | alexey-milovidov | All versions are compatible. Updating is trivial.
| 2016-07-02T21:52:35 | 2016-07-02T21:52:35 | {} | MEMBER |
ClickHouse | ClickHouse | 230,508,126 | 43 | code-of-kpp | Actually I am able to compile it now on Gentoo with GCC-5.4.0.
But somehow default CMAKE_BUILD_TYPE is RELWITHDEBINFO. As a result I got huge binary files.
When I do `cmake -DCMAKE_BUILD_TYPE=Release` or `cmake -DCMAKE_BUILD_TYPE=MinSizeRel` I got errors from gcc: unknown variables and unknown options
| 2016-07-05T15:13:07 | 2016-07-05T15:13:07 | {} | CONTRIBUTOR |
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