owner stringclasses 14
values | repo stringclasses 14
values | id int64 116k 4.61B | issue_number int32 1 181k | author stringlengths 1 39 | body stringlengths 1 262k | created_at timestamp[us]date 2000-06-06 02:40:44 2026-06-02 20:16:18 | updated_at timestamp[us]date 2000-06-06 02:40:44 2026-06-02 20:22:56 | reactions unknown | author_association stringclasses 5
values |
|---|---|---|---|---|---|---|---|---|---|
ClickHouse | ClickHouse | 429,919,052 | 2,460 | blinkov | @giuliaScalaberni could you please provide step-by-step instruction on how to reproduce this? (preferably on recent ClickHouse release) | 2018-10-15T16:18:27 | 2018-10-15T16:18:27 | {} | CONTRIBUTOR |
ClickHouse | ClickHouse | 430,251,850 | 3,203 | norrs | Anyone keen on sharing their grok filters? ie @WouldYouKindly ?
We have some clickhouse instances running in kubernetes, and would want to monitor it's stderr logs.
Thought of combining it together with https://github.com/fstab/grok_exporter for easily monitoring clickhouse via prometheus and alertmanager.
| 2018-10-16T14:08:45 | 2018-10-16T14:08:45 | {} | NONE |
ClickHouse | ClickHouse | 430,408,216 | 2,231 | alexey-milovidov | Fixed in #3118 | 2018-10-16T21:30:59 | 2018-10-16T21:30:59 | {} | MEMBER |
ClickHouse | ClickHouse | 430,415,002 | 2,662 | alexey-milovidov | This issue was fixed in #2115 | 2018-10-16T21:55:01 | 2018-10-16T21:55:01 | {} | MEMBER |
ClickHouse | ClickHouse | 430,469,391 | 2,278 | alexey-milovidov | Server startup time is proportional to the number of files and data parts.
Time is spent in `stat` syscalls to obtain file size on disk (This is needed to perform repair after hard reset.)
It is IO bound, but when single thread is used to load tables, it is bounded by sum latency and disk is not utilized by 100%.
... | 2018-10-17T02:40:44 | 2018-10-17T02:40:44 | {} | MEMBER |
ClickHouse | ClickHouse | 429,783,424 | 3,381 | filimonov | Try
```
ALTER TABLE keyword UPDATE
tags=emptyArrayString(),
WHERE id=2555 AND domain_id=9;
``` | 2018-10-15T10:00:09 | 2018-10-15T10:00:09 | {
"+1": 1
} | CONTRIBUTOR |
ClickHouse | ClickHouse | 429,940,705 | 3,378 | 4ertus2 | MOVAPS & MOVDQA instructions with unaligned data. | 2018-10-15T17:23:42 | 2018-10-15T17:23:42 | {} | CONTRIBUTOR |
ClickHouse | ClickHouse | 430,472,783 | 2,278 | alexey-milovidov | > It should be possible to give you a timeline with CPU% and IO%, with open() and stat() from our cluster. Would that help?
This is not needed, because the changes that I am working on right now are not committed to master. | 2018-10-17T03:01:56 | 2018-10-17T03:01:56 | {} | MEMBER |
ClickHouse | ClickHouse | 430,477,094 | 3,368 | alexey-milovidov | Does not build with gcc (minor issue). | 2018-10-17T03:29:15 | 2018-10-17T03:29:15 | {} | MEMBER |
ClickHouse | ClickHouse | 430,482,404 | 635 | alexey-milovidov | We have supported aliases and qualified names for both sides of JOIN; JOIN ... ON clause and correct behaviour of asterisks.
Please reopen if you have another issues.
| 2018-10-17T04:05:55 | 2018-10-17T04:05:55 | {} | MEMBER |
ClickHouse | ClickHouse | 430,486,876 | 687 | alexey-milovidov | Implemented. | 2018-10-17T04:38:07 | 2018-10-17T04:38:07 | {} | MEMBER |
ClickHouse | ClickHouse | 430,488,315 | 1,119 | alexey-milovidov | We have added support for `ON`.
Also we have added a setting `join_default_strictness` that allows you to select `ANY` or `ALL` by default. And if it is set to empty string, explicit ANY or ALL specification is required, as before.
The issue is fixed: if join_default_strictness is not set and you don't specify AN... | 2018-10-17T04:48:02 | 2018-10-17T04:48:02 | {} | MEMBER |
ClickHouse | ClickHouse | 430,489,622 | 982 | alexey-milovidov | We have introduced a setting `prefer_localhost_replica` which is 1 by default.
You can turn it off to use parallel replicas even if one of shards contain localhost replicas. | 2018-10-17T04:57:06 | 2018-10-17T04:57:06 | {} | MEMBER |
ClickHouse | ClickHouse | 430,492,782 | 1,164 | alexey-milovidov | > I understood that all columns from limit by sections should be used in outer query.
Issue with `LIMIT BY` has been fixed. | 2018-10-17T05:18:11 | 2018-10-17T05:18:11 | {} | MEMBER |
ClickHouse | ClickHouse | 430,130,411 | 3,392 | blinkov | @sundy-li as far as I can tell, Yandex Sans does not have Chinese glyphs and currently documentation just uses whatever is available locally. So on my stock Mac OS there's no difference and Chinese is rendered as PingFang SC.
Which OS do you have and which font browser currently ends up using? (this information is a... | 2018-10-16T07:26:58 | 2018-10-16T07:26:58 | {} | CONTRIBUTOR |
ClickHouse | ClickHouse | 430,347,392 | 2,169 | vavrusa | Added per-table setting in https://github.com/yandex/ClickHouse/pull/3396 | 2018-10-16T18:30:22 | 2018-10-16T18:30:22 | {
"+1": 2
} | CONTRIBUTOR |
ClickHouse | ClickHouse | 430,371,574 | 2,582 | alexey-milovidov | runningDifference is moved to PREWHERE and calculated two times.
This behaviour was fixed in master:
```
milovidov-Pro-P30 :) select x,runningDifference(x) as z from aliases_lazyness3 where z = 1 and x in (5,10,15);
SELECT
x,
runningDifference(x) AS z
FROM aliases_lazyness3
WHERE (z = 1) AND (x I... | 2018-10-16T19:38:34 | 2018-10-16T19:40:11 | {} | MEMBER |
ClickHouse | ClickHouse | 430,373,561 | 2,582 | alexey-milovidov | We cannot find simple solution for this task.
It probably will be fixed after implementation of "processors".
"Processors" will be discussed at Database Saturday event in Ekaterinburg:
https://events.yandex.ru/events/meetings/18oct-2018/ | 2018-10-16T19:43:31 | 2018-10-16T19:43:31 | {} | MEMBER |
ClickHouse | ClickHouse | 430,476,565 | 2,279 | alexey-milovidov | There was a fix #1934 that was committed at 2018-02-21.
Minimum version with this fix is 1.1.54358 that is more recent than 1.1.54342.
https://github.com/yandex/ClickHouse/blob/master/CHANGELOG.md#bug-fixes-14
> Fixed a bug when reading Nested column elements of structures that were added using ALTER but that are ... | 2018-10-17T03:25:42 | 2018-10-17T03:25:42 | {} | MEMBER |
ClickHouse | ClickHouse | 430,484,350 | 322 | alexey-milovidov | We have implemented ROLLUP and CUBE in version 18.14.
No grouping sets yet. | 2018-10-17T04:19:37 | 2018-10-17T04:19:37 | {} | MEMBER |
ClickHouse | ClickHouse | 429,862,365 | 3,380 | bartkappenburg | If you use ClickHouse with docker compose you can fix this by adding the correct upstart command. Here's my docker-compose.yml:
```
clickhouse:
ulimits:
nproc: 65535
nofile:
soft: 20000
hard: 362144
image: yandex/clickhouse-server
logging:
driver: json-file
... | 2018-10-15T13:56:56 | 2018-10-15T13:58:21 | {
"+1": 1
} | NONE |
ClickHouse | ClickHouse | 429,921,869 | 1,236 | blinkov | The requested information has not been provided. | 2018-10-15T16:26:54 | 2018-10-15T16:26:54 | {} | CONTRIBUTOR |
ClickHouse | ClickHouse | 430,122,993 | 3,384 | blinkov | @zhang2014 I'll put your comments on top of #3392 | 2018-10-16T06:57:42 | 2018-10-16T06:57:42 | {} | CONTRIBUTOR |
ClickHouse | ClickHouse | 430,206,373 | 3,311 | iFoton | +1 Same problem with ODBC function and FreeTDS for SQL Server. Also we can't store Username and Password in odbc.ini [because](https://knowledgebase.progress.com/articles/Article/2987):
> The SQL Server Wire Protocol ODBC driver does not support this functionality on both Windows and Unix platforms.
And each time... | 2018-10-16T11:46:34 | 2018-10-16T11:46:34 | {} | NONE |
ClickHouse | ClickHouse | 430,476,006 | 2,279 | alexey-milovidov | I remember there was many fixed in PREWHERE especially related to processing of Nested columns, but I'm not sure was this issue fixed. | 2018-10-17T03:21:46 | 2018-10-17T03:21:46 | {} | MEMBER |
ClickHouse | ClickHouse | 430,488,967 | 1,087 | alexey-milovidov | Проблема не воспроизводится.
Наверное, она была давным-давно исправлена.
На всякий случай я добавил ваш тест в набор. | 2018-10-17T04:52:38 | 2018-10-17T04:52:38 | {} | MEMBER |
ClickHouse | ClickHouse | 429,918,076 | 2,001 | blinkov | The requested information has not been provided. | 2018-10-15T16:15:35 | 2018-10-15T16:15:35 | {} | CONTRIBUTOR |
ClickHouse | ClickHouse | 429,980,515 | 3,378 | 4ertus2 | #3391 | 2018-10-15T19:20:16 | 2018-10-15T19:20:16 | {} | CONTRIBUTOR |
ClickHouse | ClickHouse | 430,487,427 | 1,128 | alexey-milovidov | No. @CurtizJ is working now on this issue. | 2018-10-17T04:41:50 | 2018-10-17T04:41:50 | {
"+1": 1
} | MEMBER |
ClickHouse | ClickHouse | 430,495,634 | 1,566 | alexey-milovidov | #3117 | 2018-10-17T05:36:28 | 2018-10-17T05:36:28 | {} | MEMBER |
ClickHouse | ClickHouse | 430,497,560 | 1,805 | alexey-milovidov | Implemented in #2701 | 2018-10-17T05:47:15 | 2018-10-17T05:47:15 | {} | MEMBER |
ClickHouse | ClickHouse | 430,497,731 | 1,781 | alexey-milovidov | Fixed in #2701 | 2018-10-17T05:48:22 | 2018-10-17T05:48:22 | {} | MEMBER |
ClickHouse | ClickHouse | 429,705,581 | 3,377 | alexey-milovidov | Yes, it is pretty easy. | 2018-10-15T04:31:57 | 2018-10-15T04:31:57 | {} | MEMBER |
ClickHouse | ClickHouse | 430,154,420 | 3,392 | blinkov | @sundy-li on the screen that's not the actual font that is used, scroll to the bottom of this menu, the relevant section is called "Rendered fonts". | 2018-10-16T08:48:08 | 2018-10-16T08:48:08 | {} | CONTRIBUTOR |
ClickHouse | ClickHouse | 430,168,422 | 3,392 | blinkov | @sundy-li I think I've figured it out: there was a setting in CSS that made all fonts lighter than default, -but Yandex Sans ignores it for some reason while this PingFang SC is affected both are affected.
UPD: actually both are affected, but non-light Yandex Sans looks more or less ok too. | 2018-10-16T09:30:15 | 2018-10-16T09:44:47 | {} | CONTRIBUTOR |
ClickHouse | ClickHouse | 430,469,698 | 2,278 | alexey-milovidov | After this change, it still can be parallelized not by 100% if the number of files in tables are non-uniform (for example, if there is one table with huge number of data parts and/or columns). | 2018-10-17T02:42:38 | 2018-10-17T02:42:38 | {} | MEMBER |
ClickHouse | ClickHouse | 430,477,436 | 1,777 | alexey-milovidov | Can you please provide an example table definition? | 2018-10-17T03:31:26 | 2018-10-17T03:31:26 | {} | MEMBER |
ClickHouse | ClickHouse | 430,486,469 | 829 | alexey-milovidov | Resolved.
```
docker run -d --name some-clickhouse-server-2 --ulimit nofile=262144:262144 -p9001:9000 yandex/clickhouse-server
docker run -d --name some-clickhouse-server-3 --ulimit nofile=262144:262144 -p9002:9000 yandex/clickhouse-server
$ clickhouse-client --port=9001
ClickHouse client version 18.11.0.
Con... | 2018-10-17T04:35:02 | 2018-10-17T04:35:02 | {} | MEMBER |
ClickHouse | ClickHouse | 429,849,541 | 3,387 | filimonov | CollapsingMergeTree / ReplacingMergeTree engines allow implementing _some kind_ of updates by overwriting row with the newer version (usage of those Engines have some important limitations).
| 2018-10-15T13:19:59 | 2018-10-15T13:19:59 | {
"+1": 2
} | CONTRIBUTOR |
ClickHouse | ClickHouse | 429,917,654 | 1,639 | blinkov | The requested information has not been provided. | 2018-10-15T16:14:20 | 2018-10-15T16:14:20 | {} | CONTRIBUTOR |
ClickHouse | ClickHouse | 429,919,236 | 2,587 | blinkov | Запрошенная информация не была предоставлена. | 2018-10-15T16:19:03 | 2018-10-15T16:19:03 | {} | CONTRIBUTOR |
ClickHouse | ClickHouse | 429,924,448 | 1,848 | blinkov | @digitalist проблема ещё актуальна? | 2018-10-15T16:34:43 | 2018-10-15T16:34:43 | {} | CONTRIBUTOR |
ClickHouse | ClickHouse | 430,434,094 | 2,445 | alexey-milovidov | Yes.
```
milovidov-Latitude-E7470 :) INSERT INTO test.cmdts_test VALUES ([5], ['myname'], [], ['fafa'])
INSERT INTO test.cmdts_test VALUES
Received exception from server (version 18.11.0):
Code: 190. DB::Exception: Received from localhost:9000, 127.0.0.1. DB::Exception: Elements 'cmdts.cmdty_id' and 'cmdts.c... | 2018-10-16T23:16:47 | 2018-10-16T23:16:47 | {} | MEMBER |
ClickHouse | ClickHouse | 430,448,230 | 2,312 | alexey-milovidov | Now it is failed at all when setting `enable_optimize_predicate_expression` is enabled.
@zhang2014 #2881 | 2018-10-17T00:33:50 | 2018-10-17T00:39:01 | {} | MEMBER |
ClickHouse | ClickHouse | 430,496,178 | 1,448 | alexey-milovidov | Does it reproduce in recent versions of ClickHouse? | 2018-10-17T05:39:31 | 2018-10-17T05:39:31 | {} | MEMBER |
ClickHouse | ClickHouse | 429,864,569 | 3,380 | proller | Will be fixed in next release (soon)
https://github.com/yandex/ClickHouse/commit/394b9760f499f12bf478ebe61b48ef3a2d107e94 | 2018-10-15T14:02:57 | 2018-10-15T14:02:57 | {
"+1": 5
} | CONTRIBUTOR |
ClickHouse | ClickHouse | 429,864,365 | 3,374 | bartkappenburg | If you use ClickHouse with docker compose you can fix this by adding the correct upstart command. Here's my docker-compose.yml:
```
clickhouse:
ulimits:
nproc: 65535
nofile:
soft: 20000
hard: 362144
image: yandex/clickhouse-server
logging:
driver: json-file
... | 2018-10-15T14:02:26 | 2018-10-15T14:03:18 | {} | NONE |
ClickHouse | ClickHouse | 430,477,712 | 1,777 | alexey-milovidov | ```CREATE TABLE users.perf (site String, user_id UInt64, z Float64) ENGINE = Log``` | 2018-10-17T03:33:13 | 2018-10-17T03:33:13 | {} | MEMBER |
ClickHouse | ClickHouse | 430,489,936 | 933 | alexey-milovidov | We have implemented `arraySlice` as you requested
along with `arrayPushBack`, `arrayPushFront`, `arrayPopBack`, `arrayPopFront`, `arrayResize`... | 2018-10-17T04:59:12 | 2018-10-17T04:59:12 | {} | MEMBER |
ClickHouse | ClickHouse | 429,933,703 | 1,817 | blinkov | @akonyaev90 эта проблема ещё актуальна? | 2018-10-15T17:02:26 | 2018-10-15T17:02:26 | {} | CONTRIBUTOR |
ClickHouse | ClickHouse | 430,470,497 | 2,278 | bobrik | We were definitely not seeing IO utilization reach anywhere near 100%.
It should be possible to give you a timeline with CPU% and IO%, with `open()` and `stat()` from our cluster. Would that help?
cc @dqminh | 2018-10-17T02:47:37 | 2018-10-17T02:47:37 | {} | CONTRIBUTOR |
ClickHouse | ClickHouse | 430,478,393 | 1,777 | alexey-milovidov | This is related to `enable_optimize_predicate_expression` setting:
```
milovidov-Latitude-E7470 :) SELECT * FROM (SELECT perf_1.z AS z_1 FROM users.perf AS perf_1)
SELECT *
FROM
(
SELECT perf_1.z AS z_1
FROM users.perf AS perf_1
)
Received exception from server (version 18.11.0):
Code: 179. D... | 2018-10-17T03:38:06 | 2018-10-17T03:38:06 | {} | MEMBER |
ClickHouse | ClickHouse | 430,483,101 | 587 | alexey-milovidov | Fixed in version 18.12.
https://github.com/yandex/ClickHouse/blob/master/CHANGELOG.md
> In requests with JOIN, the star character expands to a list of columns in all tables, in compliance with the SQL standard. You can restore the old behavior by setting asterisk_left_columns_only to 1 on the user configuration level... | 2018-10-17T04:10:30 | 2018-10-17T04:10:30 | {} | MEMBER |
ClickHouse | ClickHouse | 430,483,870 | 390 | alexey-milovidov | Fixed long time ago. | 2018-10-17T04:16:06 | 2018-10-17T04:16:06 | {} | MEMBER |
ClickHouse | ClickHouse | 430,492,140 | 1,254 | alexey-milovidov | > CSV files should use CR-LF
@Nina07 We can add an option to format CSV with CRLF instead of LF.
This is quite easy task. | 2018-10-17T05:14:19 | 2018-10-17T05:14:19 | {} | MEMBER |
ClickHouse | ClickHouse | 429,749,403 | 3,379 | ghuname | That is the idea. | 2018-10-15T08:14:12 | 2018-10-15T08:14:12 | {
"+1": 2
} | NONE |
ClickHouse | ClickHouse | 429,783,203 | 3,378 | 4ertus2 | Reproduced only in release build. It's probably some undefined behaviour here. | 2018-10-15T09:59:36 | 2018-10-15T09:59:36 | {} | CONTRIBUTOR |
ClickHouse | ClickHouse | 429,874,647 | 3,386 | blinkov | In ClickHouse there's no Master replica concept, so all replicas can handle inserts concurrently. It'd be impractical for them to cross-validate in real time that other replicas haven't just received the different value for each key before answering to client if it accepts the insert or not. Basically attempt to do so ... | 2018-10-15T14:27:28 | 2018-10-15T14:27:28 | {
"+1": 1
} | CONTRIBUTOR |
ClickHouse | ClickHouse | 429,920,788 | 1,311 | blinkov | The requested information has not been provided. | 2018-10-15T16:23:50 | 2018-10-15T16:23:50 | {} | CONTRIBUTOR |
ClickHouse | ClickHouse | 429,921,376 | 1,481 | blinkov | The requested information has not been provided. | 2018-10-15T16:25:29 | 2018-10-15T16:25:29 | {} | CONTRIBUTOR |
ClickHouse | ClickHouse | 429,924,879 | 1,860 | blinkov | @msoltyspl could you provide an instruction on how to reproduce this? | 2018-10-15T16:36:02 | 2018-10-15T16:36:02 | {} | CONTRIBUTOR |
ClickHouse | ClickHouse | 430,122,853 | 3,392 | blinkov | @sundy-li there's too much copy-paste in `custom_zh.css` + we have pretty specific guidelines on fonts, but it'll try to do something about it separately. | 2018-10-16T06:57:06 | 2018-10-16T06:57:06 | {} | CONTRIBUTOR |
ClickHouse | ClickHouse | 430,414,061 | 2,662 | alexey-milovidov | It was fixed about few months ago.
Sorry for the delay.
I have added your test case to the test suite. Thank you! | 2018-10-16T21:51:43 | 2018-10-16T21:51:43 | {} | MEMBER |
ClickHouse | ClickHouse | 429,745,276 | 3,379 | blinkov | @ghuname are you sure that you need it inside ClickHouse, not Python? | 2018-10-15T07:59:47 | 2018-10-15T07:59:47 | {} | CONTRIBUTOR |
ClickHouse | ClickHouse | 429,921,619 | 1,483 | blinkov | @zero-master do you have any further questions? | 2018-10-15T16:26:09 | 2018-10-15T16:26:09 | {} | CONTRIBUTOR |
ClickHouse | ClickHouse | 429,921,708 | 712 | blinkov | @gelin do you have any further questions? | 2018-10-15T16:26:27 | 2018-10-15T16:26:27 | {} | CONTRIBUTOR |
ClickHouse | ClickHouse | 430,001,806 | 3,389 | alesapin | Locally all tests are passing. Seems like tests container configuration problem. | 2018-10-15T20:30:15 | 2018-10-15T20:30:15 | {} | MEMBER |
ClickHouse | ClickHouse | 430,164,008 | 3,350 | alesapin | CI fixed. | 2018-10-16T09:17:11 | 2018-10-16T09:17:11 | {} | MEMBER |
ClickHouse | ClickHouse | 430,480,524 | 3,374 | alexey-milovidov | Fixed.
```
$ docker run -d --name some-clickhouse-server --ulimit nofile=262144:262144 -p9000:9000 yandex/clickhouse-server
7db6d5c8a12df92bb71ff65c0281bfae20c9401180b18ea0aaa8eb7dd43afcbc
$ clickhouse-client
ClickHouse client version 18.11.0.
Connecting to localhost:9000.
Connected to ClickHouse server version... | 2018-10-17T03:52:38 | 2018-10-17T03:52:38 | {
"-1": 1
} | MEMBER |
ClickHouse | ClickHouse | 429,921,267 | 1,534 | blinkov | The requested information has not been provided. | 2018-10-15T16:25:10 | 2018-10-15T16:25:10 | {} | CONTRIBUTOR |
ClickHouse | ClickHouse | 430,157,076 | 3,392 | sundy-li | @blinkov yeah, `Rendered fonts` is
```
Rendered Fonts
PingFang SC—Local file(75 glyphs)
Yandex Sans Text Web—Network resource(66 glyphs)
``` | 2018-10-16T08:56:15 | 2018-10-16T08:56:15 | {} | CONTRIBUTOR |
ClickHouse | ClickHouse | 430,355,533 | 3,395 | PetarLotrean | That's it! Thanks! | 2018-10-16T18:53:08 | 2018-10-16T18:53:08 | {} | NONE |
ClickHouse | ClickHouse | 430,408,358 | 2,231 | alexey-milovidov | Released in version 18.12. | 2018-10-16T21:31:28 | 2018-10-16T21:31:28 | {} | MEMBER |
ClickHouse | ClickHouse | 430,409,652 | 2,193 | alexey-milovidov | #3397 | 2018-10-16T21:35:52 | 2018-10-16T21:35:52 | {} | MEMBER |
ClickHouse | ClickHouse | 430,439,031 | 2,314 | alexey-milovidov | Confirmed. | 2018-10-16T23:43:36 | 2018-10-16T23:43:36 | {} | MEMBER |
ClickHouse | ClickHouse | 430,478,557 | 1,777 | alexey-milovidov | #2015 | 2018-10-17T03:39:14 | 2018-10-17T03:39:14 | {} | MEMBER |
ClickHouse | ClickHouse | 430,484,157 | 360 | alexey-milovidov | #3276 | 2018-10-17T04:18:11 | 2018-10-17T04:18:11 | {} | MEMBER |
ClickHouse | ClickHouse | 430,496,988 | 1,680 | alexey-milovidov | Fixed long time ago. | 2018-10-17T05:44:04 | 2018-10-17T05:44:04 | {} | MEMBER |
ClickHouse | ClickHouse | 429,816,955 | 3,381 | zahlio | @filimonov thanks that worked for me | 2018-10-15T11:36:31 | 2018-10-15T11:36:31 | {} | NONE |
ClickHouse | ClickHouse | 430,243,182 | 3,395 | filimonov | You are looking for [MergeState](https://clickhouse.yandex/docs/en/query_language/agg_functions/combinators/#-mergestate) combinator.
I.e. your select should look like
```sql
insert into table2
select group, uniqMergeState(agg)
from table1
group by group
``` | 2018-10-16T13:45:23 | 2018-10-16T13:46:29 | {
"+1": 2
} | CONTRIBUTOR |
ClickHouse | ClickHouse | 430,470,989 | 2,278 | alexey-milovidov | Now it loads in 54 seconds with flushed page cache
and in 4 seconds with page cache
on a server with 8 SATA HDD in RAID-5 and 16 core CPU,
with 151 tables (96 of them are from MergeTree family)
and 466033 files in ClickHouse data directory,
4040 data parts and 9577 columns in 13 TB. | 2018-10-17T02:50:39 | 2018-10-17T03:00:29 | {} | MEMBER |
ClickHouse | ClickHouse | 430,491,935 | 1,254 | alexey-milovidov | Now we have more verbose error messages:
```
$ clickhouse-local -S 'x String, y String, z String' --query="SELECT * FROM table" --input-format=CSV <<< "a,b,c"
a b c
$ clickhouse-local -S 'x String, y String, z String' --query="SELECT * FROM table" --input-format=CSV <<< "a,b,"
a b
$ clickhouse... | 2018-10-17T05:12:58 | 2018-10-17T05:13:24 | {} | MEMBER |
ClickHouse | ClickHouse | 429,919,457 | 2,623 | blinkov | The requested information has not been provided. | 2018-10-15T16:19:42 | 2018-10-15T16:19:42 | {} | CONTRIBUTOR |
ClickHouse | ClickHouse | 429,921,031 | 1,261 | blinkov | @wangyinsheng do you have any further questions? | 2018-10-15T16:24:28 | 2018-10-15T16:24:28 | {} | CONTRIBUTOR |
ClickHouse | ClickHouse | 429,928,855 | 712 | gelin | No.
пн, 15 окт. 2018 г., 22:27 Ivan Blinkov <notifications@github.com>:
> @gelin <https://github.com/gelin> do you have any further questions?
>
> —
> You are receiving this because you were mentioned.
> Reply to this email directly, view it on GitHub
> <https://github.com/yandex/ClickHouse/issues/712#issuecomment-42... | 2018-10-15T16:47:23 | 2018-10-15T16:47:23 | {} | NONE |
ClickHouse | ClickHouse | 430,411,230 | 2,674 | alexey-milovidov | Please reopen if you still have any issues building ClickHouse on Mac. | 2018-10-16T21:41:31 | 2018-10-16T21:41:31 | {} | MEMBER |
ClickHouse | ClickHouse | 430,448,596 | 2,193 | alexey-milovidov | Fixed in master. | 2018-10-17T00:36:14 | 2018-10-17T00:36:14 | {} | MEMBER |
ClickHouse | ClickHouse | 430,460,616 | 2,279 | alexey-milovidov | This is somehow related to PREWHERE optimization. | 2018-10-17T01:49:08 | 2018-10-17T01:49:08 | {} | MEMBER |
ClickHouse | ClickHouse | 430,480,660 | 3,195 | alexey-milovidov | #3374 | 2018-10-17T03:53:34 | 2018-10-17T03:53:34 | {} | MEMBER |
ClickHouse | ClickHouse | 430,481,438 | 3,336 | alexey-milovidov | Prewhere does filtering of some columns in a table,
and creates a mask of positions of rows that passed the filter.
Then another columns will be read only for ranges that contain these positions.
This operation expect that number of rows doesn't change while executing expressions before filter. Otherwise a mask wi... | 2018-10-17T03:59:16 | 2018-10-17T03:59:16 | {} | MEMBER |
ClickHouse | ClickHouse | 430,485,599 | 1,777 | zhang2014 | It fixed in #3231 . | 2018-10-17T04:28:40 | 2018-10-17T04:28:40 | {} | CONTRIBUTOR |
ClickHouse | ClickHouse | 430,495,342 | 971 | alexey-milovidov | We have fixed behaviour of asterisk.
But the issue still exist.
```
SELECT NewColumn
FROM test.test_a
ANY INNER JOIN
(
SELECT
OldColumn,
NewColumn
FROM test.test_b
) USING (OldColumn)
PREWHERE NewColumn != ''
┌─NewColumn─┐
│ 2a │
└───────────┘
1 rows in set. Ela... | 2018-10-17T05:34:40 | 2018-10-17T05:34:40 | {} | MEMBER |
ClickHouse | ClickHouse | 429,846,371 | 3,385 | alexey-milovidov | DateTime? | 2018-10-15T13:09:11 | 2018-10-15T13:09:11 | {} | MEMBER |
ClickHouse | ClickHouse | 430,482,417 | 2,582 | filimonov | I didn't look on the code, but thought it's possibile just to 'inline' aliases, by replacing alias nodes in AST to expressions from table definition during parse /ast optimization time. Inlined expressions work much better than aliases, and that seems not logical. | 2018-10-17T04:06:00 | 2018-10-17T04:06:00 | {} | CONTRIBUTOR |
ClickHouse | ClickHouse | 430,485,214 | 880 | alexey-milovidov | It was fixed long time ago. | 2018-10-17T04:25:56 | 2018-10-17T04:25:56 | {} | MEMBER |
ClickHouse | ClickHouse | 429,918,328 | 1,999 | blinkov | The requested information has not been provided. | 2018-10-15T16:16:15 | 2018-10-15T16:16:15 | {} | CONTRIBUTOR |
ClickHouse | ClickHouse | 430,152,137 | 3,392 | sundy-li | @blinkov
I am using macos 10.14 Mojave.
The font browser currently using is
`font-family: "Yandex Sans Text Web", Arial, sans-serif;`
As you can see
As you can see, the color looks a little... | 2018-10-16T08:40:49 | 2018-10-16T08:41:30 | {} | CONTRIBUTOR |
ClickHouse | ClickHouse | 430,475,082 | 2,278 | alexey-milovidov | TODO:
- it is possible to load data parts in parallel for a single table; | 2018-10-17T03:15:59 | 2018-10-17T03:15:59 | {} | MEMBER |
ClickHouse | ClickHouse | 430,489,333 | 1,078 | alexey-milovidov | Outdated. Does not reproduce. | 2018-10-17T04:55:02 | 2018-10-17T04:55:02 | {} | MEMBER |
ClickHouse | ClickHouse | 430,496,508 | 1,432 | alexey-milovidov | It is not obvious from your test case that the `date` column is consistent with `timestamp`.
Could you please provide more detailed test case? | 2018-10-17T05:41:33 | 2018-10-17T05:41:33 | {} | MEMBER |
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