* Update in-functions.md and tuple-functions.md
Изменил регистр в названиях разделов.
* Update tuple-functions.md and in-functions.md
Убрал описание операторов из in-functions.md.
Co-authored-by: Dmitriy <sevirov@yandex-team.ru>
* Update partition.md
Обновил подразделы DETACH PARTITION и DROP PARTITION.
* Update partition.md
Сделал изменения в русской версии.
Co-authored-by: Dmitriy <sevirov@yandex-team.ru>
* Create tuple-functions.md
Выполнил описание функции untuple на английском языке.
* Update tuple-functions.md
Подкорректировал описание.
* Update tuple-functions.md
Подкорректировал описание.
* Update tuple-functions.md
Внес небольшие поправки.
* Translate untuple-functions.md
Выполнил перевод на русский язык.
* Update tuple-functions.md
Внес поправки в английскую и русскую версии.
* Update tuple-functions.md
Внес поправки.
* Update tuple-functions.md and in-functions.md
Добавил функции и ссылки.
Co-authored-by: Dmitriy <sevirov@yandex-team.ru>
Function to count number of substring occurrences in the string:
- in case of needle is multi char - counts non-intersecting substrings
- the code is based on position helpers.
The following new functions is available:
- countSubstrings()
- countSubstringsCaseInsensitive()
- countSubstringsCaseInsensitiveUTF8()
v0: substringCount()
v2:
- add substringCountCaseInsensitiveUTF8
- improve tests
- fix coding style issues
- fix multichar needle
v3: rename to countSubstrings (by analogy with countEqual())
Sometimes it is odd to get TLD itself from the
cutToFirstSignificantSubdomain() (since you will not get TLD itself if
you pass it directly):
- cutToFirstSignificantSubdomain('org') -> ""
- cutToFirstSignificantSubdomain('www.org') -> org
- cutToFirstSignificantSubdomain('kernel.org') -> kernel.org
- cutToFirstSignificantSubdomain('www.kernel.org') -> kernel.org
So add one more function to get www.org in this case:
- cutToFirstSignificantSubdomainWithWWW('org') -> ""
- cutToFirstSignificantSubdomainWithWWW('www.org') -> www.org
- cutToFirstSignificantSubdomainWithWWW('kernel.org') -> kernel.org
- cutToFirstSignificantSubdomainWithWWW('www.kernel.org') -> kernel.org
P.S. not sure about the naming though, so it will great if someone has
suggestion for the name.
* Added tid and logTrace functions description
* Added minor fixes
* Minor fixes and added ru translation
* Added links
Co-authored-by: George <gyuton@yandex-team.ru>
* Docs updated for date_trunc() and now().
* Minor fix.
* Minor fix in en. Translation to Russian.
* Minor link fixes.
* Apply suggestions from code review
Co-authored-by: BayoNet <da-daos@yandex.ru>
* Updates
* Minor fix
* Minor updates for now() (en, ru).
Co-authored-by: Olga Revyakina <revolg@yandex-team.ru>
Co-authored-by: BayoNet <da-daos@yandex.ru>
This patch adds errorCode() function that will return macro name by the
exception code, useful for analyzing query_log and similar.
Later some descriptions can be added.
v2: replace hana::map/fusion::vector with external script
v3:
- use binary cmake dir for .sh
- use jump table over suboptimal std::unordered_map (with very poor hash
function for int -- std::hash)
- cleanup errorCodeToName (drop extra templates and headers)
- rename errorCode -> errorCodeToName
- fix arcadia build (by not providing those helpers there)
- fix build on CI, by using CMAKE_CXX_COMPILER for parsing the file
* DOCSUP-2806: Add meta intro.
* DOCSUP-2806: Update meta intro.
* DOCSUP-2806: Fix meta.
* DOCSUP-2806: Add quotes for meta headers.
* DOCSUP-2806: Remove quotes from meta headers.
* DOCSUP-2806: Add meta headers.
* DOCSUP-2806: Fix quotes in meta headers.
* DOCSUP-2806: Update meta headers.
* DOCSUP-2806: Fix link to nowhere in EN.
* DOCSUP-2806: Fix link (settings to tune)
* DOCSUP-2806: Fix links.
* DOCSUP-2806:Fix links EN
* DOCSUP-2806: Fix build errors.
* DOCSUP-2806: Fix meta intro.
* DOCSUP-2806: Fix toc_priority in examples datasets TOC.
* DOCSUP-2806: Fix items order in toc.
* DOCSUP-2806: Fix order in toc.
* DOCSUP-2806: Fix toc order.
* DOCSUP-2806: Fix order in toc.
* DOCSUP-2806: Fix toc index in create
* DOCSUP-2806: Fix toc order in create.
Co-authored-by: romanzhukov <romanzhukov@yandex-team.ru>
Co-authored-by: alexey-milovidov <milovidov@yandex-team.ru>
* Edit and translate
Отредактировал английскую версию текстов документов и перевел изменения на русский язык.
* Update trace_log.md
Исправляю битые ссылки.
* Fixing broken links
Исправил битые ссылки.
* Fixing broken links
Поправил битую ссылку, добавив раздел в русскую версию.
Co-authored-by: Dmitriy <sevirov@yandex-team.ru>
* Update show.md
Update descriptions of show databases and show tables.
* Update show.md
Update 'identical query'.
* Update show.md
Внес поправки согласно комментариям.
* Update show.md
Внес поправки и перевел на русский язык.
* Update show.md
Внес мелкие поправки.
Co-authored-by: Dmitriy <sevirov@yandex-team.ru>
* Description of the iLike function
Добавил описание функции iLike и добавил оператор ILIKE.
* Update string-search-functions.md
Changed by comments.
* Update and translation ilike function and ILIKE operator..
Внес поправки в английскую версию и сделал перевод на русский язык.
Co-authored-by: Dmitriy <sevirov@yandex-team.ru>
* Create view.md
Создал файл view.md и сделал описание функции view.
* Update view.md
I made changes.
* Update view.md
Changed parametrs.
* Update view.md
Changed by comments.
* Create view.md
Перевел на русский язык.
* Update ru and en file view.md
Changed by comments.
* Update en and ru versions view function.
Changed links.
Co-authored-by: Dmitriy <sevirov@yandex-team.ru>
* Added two modificators into the table of supported modificators
* Clarified description of added modifiers and started to add info according to the template of function description
* fixed link
* fix link again
* edits
* Update docs/en/sql-reference/functions/date-time-functions.md
Co-authored-by: BayoNet <da-daos@yandex.ru>
* Update docs/en/sql-reference/functions/date-time-functions.md
Co-authored-by: BayoNet <da-daos@yandex.ru>
* Update docs/en/sql-reference/functions/date-time-functions.md
Co-authored-by: BayoNet <da-daos@yandex.ru>
* comments from ticket
* +
* +
* polishing
* Update docs/en/sql-reference/functions/date-time-functions.md
Co-authored-by: BayoNet <da-daos@yandex.ru>
* external link for understanding
* Перевод на русский
* Доработала русский перевод
* Причесала перевод
* Уточнение части перевода
* Шлифовка части перевода
Co-authored-by: BayoNet <da-daos@yandex.ru>
preallocation can be used only when we know number of rows, and for this
we need:
- source clickhouse
- no filtering (i.e. lack of <where>), since filtering can filter
too much rows and eventually it may allocate memory that will
never be used.
For sparse_hash the difference is quite significant, preallocated
sparse_hash hashtable allocates ~33% faster (7.5 seconds vs 5 seconds
for insert, and the difference is more significant for higher number of
elements):
$ ninja bench-sparse_hash-run
[1/1] cd /src/ch/hashtable-bench/.cmake && ...ch/hashtable-bench/.cmake/bench-sparse_hash
sparse_hash/insert: 7.574 <!--
sparse_hash/find : 2.14426
sparse_hash/maxrss: 174MiB
sparse_hash/time: 9710.51 msec (user+sys)
$ time ninja bench-sparse_hash-preallocate-run
[1/1] cd /src/ch/hashtable-bench/.cmake && ...-bench/.cmake/bench-sparse_hash-preallocate
sparse_hash/insert: 5.0522 <!--
sparse_hash/find : 2.14024
sparse_hash/maxrss: 174MiB
sparse_hash/time: 7192.06 msec (user+sys)
P.S. the difference for sparse_hashed dictionary with 4e9 elements
(uint64, uint16) is ~18% (4975.905 vs 4103.569 sec)
v2: do not reallocate the dictionary from the progress callback
Since this will access hashtable in parallel.
v3: drop PREALLOCATE() and do this only for source=clickhouse and empty
<where>
