Commit Graph

71 Commits

Author SHA1 Message Date
Alexander Tokmakov
cce6d1989e
Update system.md 2023-02-02 22:01:00 +03:00
Robert Schulze
325c6bdf3d
Renaming: "Query Result Cache" --> "Query Cache"
Reasons:

- The cache will at some point store intermediate results as opposed to
  only query results. We should change the terminology now without
  having to worry about backward compat.

- Equivalent caches in MySQL (1) and Starrocks (2) are called "query
  cache".

- The new name is ca. 13.8% more catchy.

(1) https://dev.mysql.com/doc/refman/5.6/en/query-cache.html
(2) https://docs.starrocks.io/en-us/2.5/using_starrocks/query_cache
2023-01-31 09:54:34 +00:00
freedomDR
876a92d4d1 add doc about system sync file cache. 2023-01-28 04:27:10 +00:00
Robert Schulze
099e30ef2a
Merge remote-tracking branch 'origin/master' into query-result-cache 2023-01-16 08:04:49 +00:00
Sergei Trifonov
1b94c839d5
Add docs for SYSTEM RELOAD USERS 2023-01-11 21:16:22 +01:00
Robert Schulze
6497ddd882
Docs: Rewrite awkwardly phrased sentence about flush interval 2023-01-10 13:13:35 +00:00
Robert Schulze
3790952631
Move server-level settings into the appropriate document 2022-12-15 22:51:47 +00:00
Robert Schulze
b78652e138
Query result cache 2022-12-12 10:37:10 +00:00
Igor Nikonov
434c0f24f9
Update docs/en/sql-reference/statements/system.md
Co-authored-by: Alexander Tokmakov <tavplubix@clickhouse.com>
2022-11-07 19:40:59 +01:00
Igor Nikonov
e7fbe40b1c
Simple fixes for restart replica description 2022-11-07 14:30:52 +01:00
kssenii
6dcbeceeb9 Update doc 2022-09-20 13:00:10 +02:00
Robert Schulze
b32b02d844
Merge pull request #40897 from ClickHouse/catboost-bridge-resurrected
Move CatBoost evaluation into clickhouse-library-bridge
2022-09-16 13:12:09 +02:00
Robert Schulze
49136d26aa
docs: fix internal links
The links at the very beginning of
https://clickhouse.com/docs/en/sql-reference/statements/system
don't work. They are reference other sections of the same document. This
is weird because there is a small index already on the right side. I
searched our documentation and this seems to be the only pages which do
so. Therefore removing the links altogether instead of fixing them.
2022-09-13 19:45:46 +00:00
Robert Schulze
3e6821e8d7
fix: repair broken documentation links and update docs 2022-09-13 16:00:53 +00:00
Robert Schulze
fac1be9700
chore: restore SYSTEM RELOAD MODEL(S) and moniting view SYSTEM.MODELS
- This commit restores statements "SYSTEM RELOAD MODEL(S)" which provide
  a mechanism to update a model explicitly. It also saves potentially
  unnecessary reloads of a model from disk after it's initial load.

  To keep the complexity low, the semantics of "SYSTEM RELOAD MODEL(S)
  was changed from eager to lazy. This means that both statements
  previously immedately reloaded the specified/all models, whereas now
  the statements only trigger an unload and the first call to
  catboostEvaluate() does the actual load.

- Monitoring view SYSTEM.MODELS is also restored but with some obsolete
  fields removed. The view was not documented in the past and for now it
  remains undocumented. The commit is thus not considered a breach of
  ClickHouse's public interface.
2022-09-12 19:33:02 +00:00
Robert Schulze
c16707ff00
chore: delete obsolete modelEvaluate() function + SYSTEM.MODELS view
- The deleted function modelEvaluate() was superseded by
  catboostEvaluate().

- Also delete the external model repository, as modelEvaluate() was it's
  last user. Additionally remove the system view SYSTEM.MODELS for
  inspecting the repository.

- SYSTEM RELOAD MODELS is also obsolete. HOWEVER, it was retained and
  made a no-op instead of deleted.

  Why?
  The reason is that RBAC in distributed setups works by storing
  privileges (granted and revoked) as plain SQL statements in Keeper.
  Nodes read these statements at startup and parse them. If a privilege
  for SYSTEM RELOAD MODELS exists but parser doesn't recognize it
  nodes would fail to come up.

  Considered but rejected alternatives:
  - Ignore SYSTEM RELOAD MODELS during parsing RBAC privileges and
    return an error for regular SYSTEM RELOAD MODELS SQL. Special-case
    of no-op behavior, too brittle.
  - Remove SYSTEM RELOAD MODELS manually from Keeper via command-line
    manipulation of Keeper nodes or via SQL by dropping the privileges.
    Needs user intervention during upgrade.
2022-09-08 09:10:11 +00:00
Robert Schulze
912663b719
Revert "Move CatBoost evaluation into clickhouse-library-bridge" 2022-08-31 20:54:43 +02:00
Robert Schulze
64a6aa328e
fix: broken links in documentation (hopefully) 2022-08-29 20:27:06 +00:00
DanRoscigno
5b5fcc56aa add slugs 2022-08-28 10:53:34 -04:00
Vadim Volodin
637d293fbd Add SYSTEM UNFREEZE query 2022-06-08 15:21:14 +03:00
rfraposa
869967de41 Remove H1 anchor tags from docs 2022-06-02 04:55:18 -06:00
rfraposa
d9e6f780db Fixed broken links 2022-04-10 23:01:34 -06:00
rfraposa
8f01fe9c49 Revised /en folder 2022-04-09 07:34:21 -06:00
rfraposa
5250d9ad11 Removed /ja folder, cleaned up /ru markdown 2022-04-09 07:29:05 -06:00
Alexey Milovidov
9854b55835
Revert "Format changes for new docs" 2022-04-04 02:05:35 +03:00
rfraposa
72a00e2c62 Fixed broken links 2022-04-02 17:38:54 -06:00
rfraposa
560471f991 Update /sql-reference docs 2022-03-29 22:06:21 -06:00
zhangxiao871
20b669f330 Supports all types of SYSTEM query ON CLUSTER clause. 2022-01-26 17:40:00 +08:00
Alexander Chashnikov
e76e4bdfd2
typo 2021-10-04 12:42:55 +03:00
Alexey
8f576096ad ru translation 2021-09-27 20:24:12 +00:00
Alexey
59a69b64e0 Improved text 2021-09-26 19:44:53 +00:00
Alexey
5e1d180d64 reload and grant stub 2021-09-25 19:32:42 +00:00
pdv-ru
a662d2116f
Update docs/en/sql-reference/statements/system.md
Co-authored-by: tavplubix <tavplubix@gmail.com>
2021-08-16 15:51:02 +03:00
pdv-ru
f9a3998351
Update docs/en/sql-reference/statements/system.md
Co-authored-by: tavplubix <tavplubix@gmail.com>
2021-08-16 15:50:14 +03:00
pdv-ru
b324d85fbc DOCSUP-10607: small fix 2021-08-10 21:04:42 +03:00
pdv-ru
5b08a73d52 edit warning in system.md 2021-08-04 23:28:25 +03:00
pdv-ru
e76e9abb2d edit RESTORE REPLICA query 2021-08-04 23:07:38 +03:00
pdv-ru
3a27b724d0 edit h3ToGeo function 2021-08-04 22:47:38 +03:00
Roman Bug
0a3d021f84
Update system.md 2021-07-29 10:44:44 +03:00
Maksim Kita
db1c70975e Compile expressions updated documentation 2021-06-25 23:27:18 +03:00
Mike Kot
4c391f8e99
SYSTEM RESTORE REPLICA replica [ON CLUSTER cluster] (#13652)
* initial commit: add setting and stub

* typo

* added test stub

* fix

* wip merging new integration test and code proto

* adding steps interpreters

* adding firstly proposed solution (moving parts etc)

* added checking zookeeper path existence

* fixing the include

* fixing and sorting includes

* fixing outdated struct

* fix the name

* added ast ptr as level of indirection

* fix ref

* updating the changes

* working on test stub

* fix iterator -> reference

* revert rocksdb submodule update

* fixed show privileges test

* updated the test stub

* replaced rand() with thread_local_rng(), updated the tests

updated the test

fixed test config path

test fix

removed error messages

fixed the test

updated the test

fixed string literal

fixed literal

typo: =

* fixed the empty replica error message

* updated the test and the code with logs

* updated the possible test cases, updated

* added the code/test milestone comments

* updated the test (added more testcases)

* replaced native assert with CH one

* individual replicas recursive delete fix

* updated the AS db.name AST

* two small logging fixes

* manually generated AST fixes

* Updated the test, added the possible algo change

* Some thoughts about optimizing the solution:

ALTER MOVE PARTITION .. TO TABLE -> move to detached/ + ALTER ... ATTACH

* fix

* Removed the replica sync in test as it's invalid

* Some test tweaks

* tmp

* Rewrote the algo by using the executeQuery instead of

hand-crafting the ASTPtr.

Two questions still active.

* tr: logging active parts

* Extracted the parts moving algo into a separate helper function

* Fixed the test data and the queries slightly

* Replaced query to system.parts to direct invocation,

started building the test that breaks on various parts.

* Added the case for tables when at least one replica is alive

* Updated the test to test replicas restoration by detaching/attaching

* Altered the test to check restoration without replica restart

* Added the tables swap in the start if the server failed last time

* Hotfix when only /replicas/replica... path was deleted

* Restore ZK paths while creating a replicated MergeTree table

* Updated the docs, fixed the algo for individual replicas restoration case

* Initial parts table storage fix, tests sync fix

* Reverted individual replica restoration to general algo

* Slightly optimised getDataParts

* Trying another solution with parts detaching

* Rewrote algo without any steps, added ON CLUSTER support

* Attaching parts from other replica on restoration

* Getting part checksums from ZK

* Removed ON CLUSTER, finished working solution

* Multiple small changes after review

* Fixing parallel test

* Supporting rewritten form on cluster

* Test fix

* Moar logging

* Using source replica as checksum provider

* improve test, remove some code from parser

* Trying solution with move to detached + forget

* Moving all parts (not only Committed) to detached

* Edited docs for RESTORE REPLICA

* Re-merging

* minor fixes

Co-authored-by: Alexander Tokmakov <avtokmakov@yandex-team.ru>
2021-06-20 11:24:43 +03:00
Pavel Kruglov
0a70304085 Remove database before model name in docs 2021-06-07 13:10:51 +03:00
Dmitriy
d8271c0705 Translate to Russian
Перевел на русский язык.
2021-06-04 20:38:05 +03:00
Dmitriy
2dc39edc44 Fix the link
Поправил ссылку.
2021-06-03 00:48:14 +03:00
Dmitriy
d675510d7b Add RELOAD MODELS and RELOAD MODEL system queries
Добивал описание системных запросов.
2021-06-02 23:44:51 +03:00
Romain Neutron
7b515c7235
Avoid short syntax 2021-05-27 21:44:11 +02:00
Amir Vaza
24990449f5
Typo 2021-05-26 16:08:53 +03:00
Dmitriy
f1aef7e9a2 Edit and translate to Russian
Поправил английскую версию и выполнил перевод на русский язык.
2021-04-19 21:01:38 +03:00
Denis Krivak
ea563b193c Fix grammar in docs 2021-04-06 10:17:24 +03:00
Mike Kot
406d037ebb Merge remote-tracking branch 'upstream/master' into feature/attach-partition-local 2021-03-15 18:41:47 +03:00