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0fb9801d-7055-44a5-891c-eb0bae6054d5 | slug: /whats-new/changelog/2019
sidebar_position: 8
sidebar_label: '2019'
title: '2019 Changelog'
description: 'Changelog for 2019'
doc_type: 'changelog'
keywords: ['ClickHouse 2019', 'changelog 2019', 'release notes', 'version history', 'legacy releases']
ClickHouse Release 19.17 {#clickhouse-release-v19-17}
Cli... | {"source_file": "2019.md"} | [
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00ad0dd1-8597-447b-a69f-28767471c0c0 | Fixed bug that lead to a data race in DB::BlockStreamProfileInfo::calculateRowsBeforeLimit()
#8143
(
Alexander Kazakov
)
Fixed
ALTER table MOVE part
executed immediately after merging the specified part, which could cause moving a part which the specified part merged into. Now it correctly moves the specified par... | {"source_file": "2019.md"} | [
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682cfbe9-085d-4d59-aa63-905e212e5435 | New Feature {#new-feature}
Add the ability to create dictionaries with DDL queries.
#7360
(
alesapin
)
Make
bloom_filter
type of index supporting
LowCardinality
and
Nullable
#7363
#7561
(
Nikolai Kochetov
)
Add function
isValidJSON
to check that passed string is a valid json.
#5910
#7293
(
Vdi... | {"source_file": "2019.md"} | [
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0.04371565952897072,
0.0... |
481aca19-5e75-40bb-929e-9d680633fb8b | Fix final mark usage in
MergeTree
tables ordered by
tuple()
. In rare cases it could lead to
Can't adjust last granule
error while select.
#7639
(
Anton Popov
)
Fix bug in mutations that have predicate with actions that require context (for example functions for json), which may lead to crashes or strange exce... | {"source_file": "2019.md"} | [
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e5f71abe-580a-42e5-bbec-fe4130ddc2da | Build/Testing/Packaging Improvement {#buildtestingpackaging-improvement}
Add support for cross-compiling to the CPU architecture AARCH64. Refactor packager script.
#7370
#7539
(
Ivan
)
Unpack darwin-x86_64 and linux-aarch64 toolchains into mounted Docker volume when building packages
#7534
(
Ivan
)
Update... | {"source_file": "2019.md"} | [
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bb6d233e-635a-4ba0-9eeb-1fd9ac96b69e | Add missing arity validation for count/counIf.
#7095
#7298
(
Vdimir
)
Remove legacy
asterisk_left_columns_only
setting (it was disabled by default).
#7335
(
Artem
Zuikov
)
Format strings for Template data format are now specified in files.
#7118
(
tavplubix
)
New Feature {#new-feat... | {"source_file": "2019.md"} | [
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-0... |
2e19e319-5bcd-409f-abe5-8b6d933c526b | Fixed wrong
duration_ms
value in
system.part_log
table. It was ten times off.
#7172
(
Vladimir
Chebotarev
)
A quick fix to resolve crash in LIVE VIEW table and re-enabling all LIVE VIEW tests.
#7201
(
vzakaznikov
)
Serialize NULL values correctly in min/max indexes of MergeTree parts.
#... | {"source_file": "2019.md"} | [
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-... |
50f86049-3258-4a67-9306-53f9ea6ef2cd | (
tavplubix
)
Build/Testing/Packaging Improvement {#buildtestingpackaging-improvement-1}
Disable some contribs for cross-compilation to Mac OS.
#7101
(
Ivan
)
Add missing linking with PocoXML for clickhouse_common_io.
#7200
(
Azat
Khuzhin
)
Accept multiple test filter arguments in clickhouse... | {"source_file": "2019.md"} | [
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beb5dc41-60cd-429d-9a7a-97a019df7287 | (
alesapin
)
Refactor some code to prepare for role-based access control.
#7235
(
Vitaly
Baranov
)
Some improvements in DatabaseOrdinary code.
#7086
(
Nikita
Vasilev
)
Do not use iterators in find() and emplace() methods of hash tables.
#7026
(
Alexander
Kuzmenkov
)
Fix getMultipleValu... | {"source_file": "2019.md"} | [
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-... |
486d0a4c-56c2-4560-adc1-1e7082d7c24c | ClickHouse Release 19.15.2.2, 2019-10-01 {#clickhouse-release-19-15-2-2-2019-10-01}
New Feature {#new-feature-3}
Tiered storage: support to use multiple storage volumes for tables with MergeTree engine. It's possible to store fresh data on SSD and automatically move old data to HDD. (
example
).
#4918
(
Igr
)
... | {"source_file": "2019.md"} | [
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eb90340f-77c0-40dd-b6cc-eab00f45df23 | Build/Testing/Packaging Improvement {#buildtestingpackaging-improvement-2}
Add gdb-index to clickhouse binary with debug info. It will speed up startup time of
gdb
.
#6947
(
alesapin
)
Speed up deb packaging with patched dpkg-deb which uses
pigz
.
#6960
(
alesapin
)
Set
enable_fuzzing = 1
to enable libf... | {"source_file": "2019.md"} | [
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... |
bfe4d6e8-388d-4a59-a299-32e183dc95fb | Fix
flapping
test
00715_fetch_merged_or_mutated_part_zookeeper
by rewriting it to a shell scripts because it needs to wait for mutations to apply.
#6977
(
Alexander Kazakov
)
Fixed UBSan and MemSan failure in function
groupUniqArray
with emtpy array argument. It was caused by placing of empty
PaddedPODArray
... | {"source_file": "2019.md"} | [
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a9fa0195-145b-46f8-93b7-f7be87199887 | Table constraints. Allows to add constraint to table definition which will be checked at insert.
#5273
(
Gleb Novikov
)
#6652
(
alexey-milovidov
)
Suppport for cascaded materialized views.
#6324
(
Amos Bird
)
Turn on query profiler by default to sample every query execution thread once a second.
#6283
(
ale... | {"source_file": "2019.md"} | [
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fade7280-e1e4-4262-b943-426640f77080 | Bug Fix {#bug-fix-8}
This release also contains all bug fixes from 19.13 and 19.11.
Fix segmentation fault when the table has skip indices and vertical merge happens.
#6723
(
alesapin
)
Fix per-column TTL with non-trivial column defaults. Previously in case of force TTL merge with
OPTIMIZE ... FINAL
query, ... | {"source_file": "2019.md"} | [
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bddb0d49-988f-4ae5-b899-6febf3685a72 | Fixed bug in MySQL wire protocol (is used while connecting to ClickHouse form MySQL client). Caused by heap buffer overflow in
PacketPayloadWriteBuffer
.
#6212
(
Yuriy Baranov
)
Fixed memory leak in
bitmapSubsetInRange
function.
#6819
(
Zhichang Yu
)
Fix rare bug when mutation executed after granularity chan... | {"source_file": "2019.md"} | [
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0.056366488337516785,
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-0.0... |
60046de6-dd0b-4dcb-947c-1d003daade02 | Fix crash in
yandexConsistentHash
function. Found by fuzz test.
#6304
#6305
(
alexey-milovidov
)
Fixed the possibility of hanging queries when server is overloaded and global thread pool becomes near full. This have higher chance to happen on clusters with large number of shards (hundreds), because distributed ... | {"source_file": "2019.md"} | [
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b597157d-f3ca-415b-a5cb-86dc34d6668f | Security Fix {#security-fix}
This release also contains all bug security fixes from 19.13 and 19.11.
Fixed the possibility of a fabricated query to cause server crash due to stack overflow in SQL parser. Fixed the possibility of stack overflow in Merge and Distributed tables, materialized views and conditions for... | {"source_file": "2019.md"} | [
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e7923c7a-a8ca-484c-90e6-3b4587aedbb4 | Upated
SIMDJSON
.
#6285
.
#6306
(
alexey-milovidov
)
Optimize selecting of smallest column for
SELECT count()
query.
#6344
(
Amos Bird
)
Added
strict
parameter in
windowFunnel()
. When the
strict
is set, the
windowFunnel()
applies conditions only for the unique values.
#6548
(
achimbab
)
Safer in... | {"source_file": "2019.md"} | [
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74e2b647-fb39-427f-a40a-b6eacbd36b38 | Better information messages about lack of Linux capabilities. Logging fatal errors with "fatal" level, that will make it easier to find in
system.text_log
.
#6441
(
alexey-milovidov
)
When enable dumping temporary data to the disk to restrict memory usage during
GROUP BY
,
ORDER BY
, it didn't check the free dis... | {"source_file": "2019.md"} | [
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82325042-63dd-4168-ba9e-baea925ab174 | A workaround for PHP mysqlnd extension bugs which occur when
sha256_password
is used as a default authentication plugin (described in
#6031
).
#6113
(
Yuriy Baranov
)
Remove unneeded place with changed nullability columns.
#6693
(
Artem Zuikov
)
Set default value of
queue_max_wait_ms
to zero, because curre... | {"source_file": "2019.md"} | [
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fb851f06-1496-44fe-ab4b-666083fe89a6 | Build/Testing/Packaging Improvement {#buildtestingpackaging-improvement-4}
Remove Compiler (runtime template instantiation) because we've win over it's performance.
#6646
(
alexey-milovidov
)
Added performance test to show degradation of performance in gcc-9 in more isolated way.
#6302
(
alexey-milovidov
)
... | {"source_file": "2019.md"} | [
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8f3fe388-3b0f-4715-a784-4176f81b6b00 | Fixed MSan report.
#6144
(
alexey-milovidov
)
Fix flapping TTL test.
#6782
(
Anton Popov
)
Fixed false data race in
MergeTreeDataPart::is_frozen
field.
#6583
(
alexey-milovidov
)
Fixed timeouts in fuzz test. In previous version, it managed to find false hangup in query
SELECT * FROM numbers_mt(gccMurmurH... | {"source_file": "2019.md"} | [
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923aeadb-9dcb-49b4-8151-daf6cf5090bf | Added a test for bad URIs.
#6493
(
alexey-milovidov
)
Added more checks to
CAST
function. This should get more information about segmentation fault in fuzzy test.
#6346
(
Nikolai Kochetov
)
Added
gcc-9
support to
docker/builder
container that builds image locally.
#6333
(
Gleb Novikov
)
Test for prima... | {"source_file": "2019.md"} | [
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0.00... |
ea4faa28-095c-4a76-92d2-f9fb6507e48e | Table function
url
had the vulnerability allowed the attacker to inject arbitrary HTTP headers in the request. This issue was found by
Nikita Tikhomirov
.
#6466
(
alexey-milovidov
)
Fix useless
AST
check in Set index.
#6510
#6651
(
Nikita Vasilev
)
Fixed parsing of
AggregateFunction
values embedded in ... | {"source_file": "2019.md"} | [
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3c686d65-15d6-4409-b952-590c3f10a3a2 | Fixed possible data loss after
ALTER DELETE
query on table with skipping index.
#6224
#6282
(
Nikita Vasilev
)
Security Fix {#security-fix-2}
If the attacker has write access to ZooKeeper and is able to run custom server available from the network where ClickHouse run, it can create custom-built malicious... | {"source_file": "2019.md"} | [
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de4ac99f-7d86-415d-89a1-9dff39031a86 | Throws an exception if
config.d
file does not have the corresponding root element as the config file
#6123
(
dimarub2000
)
Performance Improvement {#performance-improvement-3}
Optimize
count()
. Now it uses the smallest column (if possible).
#6028
(
Amos Bird
)
Build/Testing/Packaging Improvement {#b... | {"source_file": "2019.md"} | [
-0.006558326538652182,
0.03565452620387077,
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0.021104350686073303,
-0.10578741133213043,
-0.0... |
6f2bfb31-6c23-4cf1-91c8-18e16079df66 | Fix Kafka messages duplication problem on normal server restart.
#6597
(
Ivan
)
Fixed an issue when long
ALTER UPDATE
or
ALTER DELETE
may prevent regular merges to run. Prevent mutations from executing if there is no enough free threads available.
#6502
#6617
(
tavplubix
)
Fixed error with processing "tim... | {"source_file": "2019.md"} | [
-0.09266507625579834,
-0.03303108364343643,
-0.03580055013298988,
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0.0... |
8042b9b9-4ab7-4109-aa55-65db725de472 | Fix bug with memory allocation for string fields in complex key cache dictionary.
#6447
(
alesapin
)
Fix bug with enabling adaptive granularity when creating new replica for
Replicated*MergeTree
table.
#6452
(
alesapin
)
Fix infinite loop when reading Kafka messages.
#6354
(
abyss7
)
Fixed the possibility... | {"source_file": "2019.md"} | [
-0.023780839517712593,
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0e41cb96-b689-4066-8e48-c32bdc72cd10 | Fix non-deterministic result of "uniq" aggregate function in extreme rare cases. The bug was present in all ClickHouse versions.
#6058
(
alexey-milovidov
)
Segfault when we set a little bit too high CIDR on the function
IPv6CIDRToRange
.
#6068
(
Guillaume Tassery
)
Fixed small memory leak when server throw man... | {"source_file": "2019.md"} | [
-0.04798823967576027,
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0.017179369926452637,
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-0.022509781643748283,
... |
87b48065-9616-49d5-9df1-ac6007653817 | Fix segfault in TTL merge with non-physical columns in block.
#5819
(
Anton Popov
)
Fix rare bug in checking of part with
LowCardinality
column. Previously
checkDataPart
always fails for part with
LowCardinality
column.
#5832
(
alesapin
)
Avoid hanging connections when server thread pool is full. It is im... | {"source_file": "2019.md"} | [
0.013056116178631783,
-0.027172693982720375,
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-0.05414937436580658,
... |
ee883733-16bb-4975-8d30-2ee28e446506 | Fix shutdown of SystemLogs
#5802
(
Anton Popov
)
Fix hanging when condition in invalidate_query depends on a dictionary.
#6011
(
Vitaly Baranov
)
Improvement {#improvement-6}
Allow unresolvable addresses in cluster configuration. They will be considered unavailable and tried to resolve at every connection... | {"source_file": "2019.md"} | [
-0.002589931944385171,
0.01992553472518921,
0.02207842282950878,
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0.02533387765288353,
0.007381040137261152,
-0... |
d34b8b32-25ea-493c-844d-00e349aebb7e | Performance Improvement {#performance-improvement-4}
Increase number of streams to SELECT from Merge table for more uniform distribution of threads. Added setting
max_streams_multiplier_for_merge_tables
. This fixes
#5797
#5915
(
alexey-milovidov
)
Build/Testing/Packaging Improvement {#buildtestingpackagin... | {"source_file": "2019.md"} | [
-0.018953055143356323,
-0.05051045119762421,
-0.04513672739267349,
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0.0034014051780104637,
-0.0... |
5bf2eb08-3350-48e7-8be2-df8a667e0e50 | Split Common/config.h by libs (dbms)
#5715
(
proller
)
Fixes for "Arcadia" build platform
#5795
(
proller
)
Fixes for unconventional build (gcc9, no submodules)
#5792
(
proller
)
Require explicit type in unalignedStore because it was proven to be bug-prone
#5791
(
akuzm
)
Fixes macOS build
#5830
(
fil... | {"source_file": "2019.md"} | [
-0.05345577374100685,
-0.07719220221042633,
0.019506150856614113,
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0.05075730010867119,
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0.05705135688185692,
0.03785456717014313,
-0.012222964316606522,
-0.11858338117599487,
-0.0614... |
6ed70a6f-4a64-4286-8cb8-bcf0fc3230ed | Fixed
Incorrect size of index granularity
errors
#5720
(
coraxster
)
Fix Float to Decimal convert overflow
#5607
(
coraxster
)
Flush buffer when
WriteBufferFromHDFS
's destructor is called. This fixes writing into
HDFS
.
#5684
(
Xindong Peng
)
Improvement {#improvement-7}
Treat empty cells in
CSV... | {"source_file": "2019.md"} | [
-0.005616412032395601,
-0.04284260794520378,
-0.02901945821940899,
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0.003573095425963402,
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0.02899145893752575,
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0.02348616160452366,
-0.0051924544386565685,
-0... |
e4475891-9273-41d0-ae4c-6bcd03f90726 | ClickHouse Release 19.9 {#clickhouse-release-19-9}
ClickHouse Release 19.9.3.31, 2019-07-05 {#clickhouse-release-19-9-3-31-2019-07-05}
Bug Fix {#bug-fix-23}
Fix segfault in Delta codec which affects columns with values less than 32 bits size. The bug led to random memory corruption.
#5786
(
alesapin
)
Fix r... | {"source_file": "2019.md"} | [
-0.04146815091371536,
-0.03416236490011215,
-0.023466238752007484,
0.01621238701045513,
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-0.03342083469033241,
0.024728307500481606,
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0.016430677846074104,
0.05737729370594025,
0.04216634854674339,
-0.0646757185459137,
-0.0432... |
664d7a92-c359-4a95-ba0c-e16f7b02367b | Fix INSERT into Distributed table with MATERIALIZED column
#5429
(
Azat Khuzhin
)
Fix bad alloc when truncate Join storage
#5437
(
TCeason
)
In recent versions of package tzdata some of files are symlinks now. The current mechanism for detecting default timezone gets broken and gives wrong names for some timezo... | {"source_file": "2019.md"} | [
-0.030662348493933678,
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0.034623485058546066,
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0.00008861148671712726,
... |
7911259f-5d20-4a24-b008-af7dd11110d0 | ClickHouse Release 19.8.3.8, 2019-06-11 {#clickhouse-release-19-8-3-8-2019-06-11}
New Features {#new-features}
Added functions to work with JSON
#4686
(
hcz
)
#5124
. (
Vitaly Baranov
)
Add a function basename, with a similar behaviour to a basename function, which exists in a lot of languages (
os.path.base... | {"source_file": "2019.md"} | [
-0.08730914443731308,
-0.049869898706674576,
-0.038904935121536255,
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0.0034720904659479856,
0.0386882945895195,
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0.028346281498670578,
-0.009975460357964039,
0.007202950306236744,
... |
b8c0d4ef-07e6-4855-871c-6df87b7548fd | Added functions
IPv4CIDRtoIPv4Range
and
IPv6CIDRtoIPv6Range
to calculate the lower and higher bounds for an IP in the subnet using a CIDR.
#5095
(
Guillaume Tassery
)
Add a X-ClickHouse-Summary header when we send a query using HTTP with enabled setting
send_progress_in_http_headers
. Return the usual informat... | {"source_file": "2019.md"} | [
-0.019321847707033157,
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0.035629674792289734,
... |
6e94637c-9156-4599-b09c-fb11cc4bd0a0 | Better error messages if checksum mismatch is most likely caused by hardware failures.
#5355
(
alexey-milovidov
)
Check that underlying tables support sampling for
StorageMerge
#5366
(
Ivan
)
Сlose MySQL connections after their usage in external dictionaries. It is related to issue #893.
#5395
(
Clément Rod... | {"source_file": "2019.md"} | [
-0.015683315694332123,
-0.05511641874909401,
-0.1045510396361351,
0.026143111288547516,
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0.03567852824926376,
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0.011971434578299522,
0.10885946452617645,
-0.005... |
e81c24c6-5e74-457b-82bb-f968f6a661e0 | Fix
retention
function. Now all conditions that satisfy in a row of data are added to the data state.
#5119
(
小路
)
Fix result type for
quantileExact
with Decimals.
#5304
(
Artem Zuikov
)
Documentation {#documentation}
Translate documentation for
CollapsingMergeTree
to chinese.
#5168
(
张风啸
)
Tran... | {"source_file": "2019.md"} | [
-0.09613444656133652,
0.06509387493133545,
0.00244972575455904,
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0.022923115640878677,
0.03535251319408417,
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0.026676613837480545,
0.05267232656478882,
-0.05194703862071037,
0.01277241576462984,
-0.040622... |
45b1c5ca-039c-4228-994f-41a5356f166d | Fix bug when parts were removed only from FS without dropping them from Zookeeper.
#5520
(
alesapin
)
Fix segmentation fault in
bitmapHasAny
function.
#5528
(
Zhichang Yu
)
Fixed error when replication connection pool does not retry to resolve host, even when DNS cache was dropped.
#5534
(
alesapin
)
Fixe... | {"source_file": "2019.md"} | [
-0.07145895063877106,
0.012330473400652409,
0.04740925878286362,
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0.05635406821966171,
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0.005811493843793869,
0.008361570537090302,
-0.0... |
88659bf7-f0ea-453a-bcda-12f267d56c09 | Print UTF-8 characters properly in
clickhouse-test
.
#5084
(
alexey-milovidov
)
Add command line parameter for clickhouse-client to always load suggestion
data.
#5102
(
alexey-milovidov
)
Resolve some of PVS-Studio warnings.
#5082
(
alexey-milovidov
)
Update LZ4
#5040
(
Danila
... | {"source_file": "2019.md"} | [
-0.054773516952991486,
-0.0485556498169899,
-0.05946614593267441,
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0.07170087099075317,
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-0.05130159854888916,
0.06922978162765503,
-0.0093... |
b04fd0d7-4375-4a97-a810-ae98b746431c | Performance Improvements {#performance-improvements-2}
Significant speedup of ASOF JOIN
#4924
(
Martijn Bakker
)
Backward Incompatible Changes {#backward-incompatible-changes}
HTTP header
Query-Id
was renamed to
X-ClickHouse-Query-Id
for consistency.
#4972
(
Mikhail
)
Bug Fixes {#bug-fixes-4}
... | {"source_file": "2019.md"} | [
-0.025218604132533073,
0.0013732408406212926,
-0.028426039963960648,
0.016255704686045647,
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-0.02262384630739689,
-0.027437040582299232,
-0.06555482000112534,
-0.018688222393393517,
0.03283530846238136,
0.047827206552028656,
0.05990976840257645,
... |
750871e5-d136-4c3e-9279-644408644b87 | Modification of retention function: If a row satisfies both the first and NTH condition, only the first satisfied condition is added to the data state. Now all conditions that satisfy in a row of data are added to the data state.
#5119
(
小路
)
ClickHouse Release 19.5.3.8, 2019-04-18 {#clickhouse-release-19-5-3-8-2... | {"source_file": "2019.md"} | [
-0.06398344039916992,
-0.030842846259474754,
0.03149939700961113,
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-0.00037576915929093957,
0.022042127326130867,
0.022... |
f1ae1a03-b8a0-4485-808a-64955cdd2f46 | Rename
trigramDistance
function to
ngramDistance
and add more functions with
CaseInsensitive
and
UTF
.
#4602
(
Danila Kutenin
)
Improved data skipping indices calculation.
#4640
(
Nikita Vasilev
)
Keep ordinary,
DEFAULT
,
MATERIALIZED
and
ALIAS
columns in a single list (fixes issue
#2867
).
#4707
... | {"source_file": "2019.md"} | [
0.005963712930679321,
0.014033257961273193,
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0.06017501652240753,
-0.022953283041715622,
-0.05806735157966614,
-0... |
92d5e083-7d72-4d85-98c0-ecab01cc9642 | Fixed rare data race that can happen during
RENAME
table of MergeTree family.
#4844
(
alexey-milovidov
)
Fixed segmentation fault in function
arrayIntersect
. Segmentation fault could happen if function was called with mixed constant and ordinary arguments.
#4847
(
Lixiang Qian
)
Fixed reading from
Array(Lo... | {"source_file": "2019.md"} | [
-0.04169683903455734,
0.006420855410397053,
0.01116483099758625,
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0.011147434823215008,
-0.009682358242571354,
-0... |
ad84029e-481b-4a57-973e-93978a33fa94 | Fix performance issue when setting
use_uncompressed_cache
is greater than zero, which appeared when all read data contained in cache.
#4913
(
alesapin
)
Build/Testing/Packaging Improvement {#buildtestingpackaging-improvement-10}
Hardening debug build: more granular memory mappings and ASLR; add memory prote... | {"source_file": "2019.md"} | [
-0.0015833021607249975,
0.04521670937538147,
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-0.033141057938337326,
-0.019628964364528656,
... |
f9431d33-752c-461b-8e86-df1face786f1 | Fix
histogram
function behaviour with
Distributed
tables.
#4741
(
olegkv
)
Fixed tsan report
destroy of a locked mutex
.
#4742
(
alexey-milovidov
)
Fixed TSan report on shutdown due to race condition in system logs usage. Fixed potential use-after-free on shutdown when part_log is enabled.
#4758
(
alexey... | {"source_file": "2019.md"} | [
-0.020114032551646233,
-0.007004568353295326,
0.027520183473825455,
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0.003239098470658064,
0.07038731127977371,
-... |
8d25f1ca-5400-4e95-ba49-92241b20e9f7 | Fix function
toISOWeek
result for year 1970.
#4988
(
alexey-milovidov
)
Fix
DROP
,
TRUNCATE
and
OPTIMIZE
queries duplication, when executed on
ON CLUSTER
for
ReplicatedMergeTree*
tables family.
#4991
(
alesapin
)
Improvements {#improvements-2}
Keep ordinary,
DEFAULT
,
MATERIALIZED
and
ALIAS... | {"source_file": "2019.md"} | [
-0.061795447021722794,
-0.023755399510264397,
0.032495416700839996,
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0.08740739524364471,
0.018339216709136963,
0.0013946783728897572,
-... |
d96503d6-4d24-48a9-910f-160747f43a1b | This release also contains all bug fixes from 19.3 and 19.1.
Fixed bug in data skipping indices: order of granules after INSERT was incorrect.
#4407
(
Nikita Vasilev
)
Fixed
set
index for
Nullable
and
LowCardinality
columns. Before it,
set
index with
Nullable
or
LowCardinality
column led to error
Dat... | {"source_file": "2019.md"} | [
0.014405417256057262,
-0.057261958718299866,
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0.010851612314581871,
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0.0378788486123085,
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0.07155042886734009,
0.012610414065420628,
-0.033027004450559616,
-0... |
0d4d3d28-e4b5-4052-9d72-41173d9df564 | Performance Improvements {#performance-improvements-3}
Improved heuristics of "move to PREWHERE" optimization.
#4405
(
alexey-milovidov
)
Use proper lookup tables that uses HashTable's API for 8-bit and 16-bit keys.
#4536
(
Amos Bird
)
Improved performance of string comparison.
#4564
(
alexey-milovidov
)
... | {"source_file": "2019.md"} | [
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4d11e3ed-ee03-4d76-803b-4a67a3d84756 | ClickHouse Release 19.3.6, 2019-03-02 {#clickhouse-release-19-3-6-2019-03-02}
Bug Fixes {#bug-fixes-14}
When there are more than 1000 threads in a thread pool,
std::terminate
may happen on thread exit.
Azat Khuzhin
#4485
#4505
(
alexey-milovidov
)
Now it's possible to create
ReplicatedMergeTree*
table... | {"source_file": "2019.md"} | [
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... |
f223a5c4-c6ca-4820-901b-6c6ba9a5e190 | Fixed bug in the set index (dropping a granule if it contains more than
max_rows
rows).
#4386
(
Nikita Vasilev
)
A lot of FreeBSD build fixes.
#4397
(
proller
)
Fixed aliases substitution in queries with subquery containing same alias (issue
#4110
).
#4351
(
Artem Zuikov
)
Build/Testing/Packaging Impro... | {"source_file": "2019.md"} | [
-0.06315351277589798,
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de3d0fad-1306-4452-87ab-616ca81ba730 | Bug Fixes {#bug-fixes-17}
Fixed
Not found column
for duplicate columns in
JOIN ON
section.
#4279
(
Artem Zuikov
)
Make
START REPLICATED SENDS
command start replicated sends.
#4229
(
nvartolomei
)
Fixed aggregate functions execution with
Array(LowCardinality)
arguments.
#4055
(
KochetovNicolai
)
... | {"source_file": "2019.md"} | [
-0.0589732900261879,
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0.04640887677669525,
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baa983a7-ee33-4a59-8236-5ff250c86edc | Added
sumMapWithOverflow
function.
#4151
(
Léo Ercolanelli
)
Fixed segfault with
allow_experimental_multiple_joins_emulation
.
52de2c
(
Artem Zuikov
)
Fixed bug with incorrect
Date
and
DateTime
comparison.
#4237
(
valexey
)
Fixed fuzz test under undefined behavior sanitizer: added parameter type chec... | {"source_file": "2019.md"} | [
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fe0a90ab-aba6-49a5-ab86-4f07024c0315 | Performance Improvements {#performance-improvements-4}
std::sort
replaced by
pdqsort
for queries without
LIMIT
.
#4236
(
Evgenii Pravda
)
Now server reuse threads from global thread pool. This affects performance in some corner cases.
#4150
(
alexey-milovidov
)
Improvements {#improvements-5}
Imple... | {"source_file": "2019.md"} | [
-0.05343826115131378,
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0.02827480621635914,
-0.063... |
fa683294-a5b5-4d37-a2ee-a05b377a72fb | Bug Fixes {#bug-fixes-19}
Fix install package with missing /etc/clickhouse-server/config.xml.
#4343
(
proller
)
ClickHouse Release 19.1 {#clickhouse-release-19-1-2}
ClickHouse Release 19.1.7, 2019-02-15 {#clickhouse-release-19-1-7-2019-02-15}
Bug Fixes {#bug-fixes-20}
Correctly return the right type a... | {"source_file": "2019.md"} | [
-0.05142225697636604,
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0.01... |
31740c15-e53d-4810-a601-26df8a5b8452 | Fixed
Not found column
for duplicate columns in JOIN ON section.
#4279
(
Artem Zuikov
)
Now
/etc/ssl
is used as default directory with SSL certificates.
#4167
(
alexey-milovidov
)
Fixed crash on dictionary reload if dictionary not available.
#4188
(
proller
)
Fixed bug with incorrect
Date
and
DateTim... | {"source_file": "2019.md"} | [
-0.08795187622308731,
-0.02246956154704094,
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... |
ddfea794-bdbf-4957-95e0-7fb1ef6dcecc | Fix a bug that led to hangups in threads that perform ALTERs of Replicated tables and in the thread that updates configuration from ZooKeeper.
#2947
#3891
#3934
(
Alex Zatelepin
)
Fixed a race condition when executing a distributed ALTER task. The race condition led to more than one replica trying to execute th... | {"source_file": "2019.md"} | [
-0.059046681970357895,
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0... |
ae553917-5f02-44f8-998b-c014922c5855 | Fixed incorrect result when HAVING was used with ROLLUP or CUBE.
#3756
#3837
(
Sam Chou
)
Fixed column aliases for query with
JOIN ON
syntax and distributed tables.
#3980
(
Winter Zhang
)
Fixed error in internal implementation of
quantileTDigest
(found by Artem Vakhrushev). This error never happens in Cli... | {"source_file": "2019.md"} | [
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607ced79-1676-4560-a6a8-034ce2e826e3 | Reverted
jemalloc
version which lead to performance degradation.
#4018
(
alexey-milovidov
)
Backward Incompatible Changes {#backward-incompatible-changes-2}
Removed undocumented feature
ALTER MODIFY PRIMARY KEY
because it was superseded by the
ALTER MODIFY ORDER BY
command.
#3887
(
Alex Zatelepin
)
... | {"source_file": "2019.md"} | [
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0a5a7516-7ba1-4868-942b-e23b1adb34d1 | slug: /whats-new/changelog/2018
sidebar_position: 9
sidebar_label: '2018'
title: '2018 Changelog'
description: 'Changelog for 2018'
doc_type: 'changelog'
keywords: ['ClickHouse 2018', 'changelog 2018', 'release notes', 'version history', 'legacy releases']
ClickHouse Release 18.16 {#clickhouse-release-18-16}
Clic... | {"source_file": "2018.md"} | [
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... |
ebacff7a-6d34-4f33-8cbe-171b6d90cbcd | Now you can specify the options
join_use_nulls
,
max_rows_in_join
,
max_bytes_in_join
, and
join_overflow_mode
when creating a
Join
type table.
Amos Bird
Added the
joinGet
function that allows you to use a
Join
type table like a dictionary.
Amos Bird
Added the
partition_key
,
sorting_key
,
primary_k... | {"source_file": "2018.md"} | [
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0.005023702047765255,
-0.0... |
1b244e0f-8ef8-4486-8db9-ea962cb19c6c | Fixed a crash when specifying a non-constant scale argument in
toDecimal32/64/128
functions.
Fixed an error when trying to insert an array with
NULL
elements in the
Values
format into a column of type
Array
without
Nullable
(if
input_format_values_interpret_expressions
= 1).
#3487
#3503
Fixed continu... | {"source_file": "2018.md"} | [
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0.0... |
ae21e846-55c7-4556-97b4-05207f8f260a | Added for the
Kafka
table engine: checks for subscriptions before beginning to read from Kafka; the kafka_max_block_size setting for the table.
Marek Vavruša
The
cityHash64
,
farmHash64
,
metroHash64
,
sipHash64
,
halfMD5
,
murmurHash2_32
,
murmurHash2_64
,
murmurHash3_32
, and
murmurHash3_64
functions n... | {"source_file": "2018.md"} | [
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-0.... |
fc3efd9f-8ca7-4750-9a83-c1888262b051 | Removed the ability to compare the
Date
type with a number to avoid potential errors like
date = 2018-12-17
, where quotes around the date are omitted by mistake.
#3687
Fixed the behavior of stateful functions like
rowNumberInAllBlocks
. They previously output a result that was one number larger due to starting ... | {"source_file": "2018.md"} | [
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40a02923-dd97-4875-9903-ead8f2f9f5df | ClickHouse Release 18.14.17, 2018-11-30 {#clickhouse-release-18-14-17-2018-11-30}
Bug Fixes: {#bug-fixes-4}
Fixed cases when the ODBC bridge process did not terminate with the main server process.
#3642
Fixed synchronous insertion into the
Distributed
table with a columns list that differs from the column li... | {"source_file": "2018.md"} | [
-0.03835051506757736,
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0.028584925457835197,
0.005516439210623503,
-0... |
564bc3f6-6368-41f3-a11c-9e7f4fd1ec63 | Fixed errors when merging data in tables containing arrays inside Nested structures.
#3397
Fixed incorrect query results if the
merge_tree_uniform_read_distribution
setting is disabled (it is enabled by default).
#3429
Fixed an error on inserts to a Distributed table in Native format.
#3411
ClickHouse Rele... | {"source_file": "2018.md"} | [
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-0.01... |
5097eddb-6026-44f8-8f79-3ef7478eb5d9 | LIKE and IN expressions with a constant right half are passed to the remote server when querying from MySQL or ODBC tables.
#3182
Comparisons with constant expressions in a WHERE clause are passed to the remote server when querying from MySQL and ODBC tables. Previously, only comparisons with constants were passed. ... | {"source_file": "2018.md"} | [
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c4d85769-8ef9-4b42-8f6d-7c20dc92dc82 | Bug Fixes: {#bug-fixes-10}
Fixed an issue with
Dictionary
tables for
range_hashed
dictionaries. This error occurred in version 18.12.17.
#1702
Fixed an error when loading
range_hashed
dictionaries (the message
Unsupported type Nullable (...)
). This error occurred in version 18.12.17.
#3362
Fixed error... | {"source_file": "2018.md"} | [
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-... |
e5f70789-8e46-43af-9121-168fd5ca7a3c | Fixed a parsing error in CSV format with floating-point numbers if a non-default CSV separator is used, such as
;
#3155
Fixed the
arrayCumSumNonNegative
function (it does not accumulate negative values if the accumulator is less than zero).
Aleksey Studnev
Fixed how
Merge
tables work on top of
Distributed
... | {"source_file": "2018.md"} | [
-0.036482635885477066,
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0.006762364879250526,
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-0.013609700836241245,
-0.0028450246900320053,
-0.0... |
fc7e78d9-5079-4574-a17a-8eee9124577c | Removed the
allow_experimental_decimal_type
option. The
Decimal
data type is available for default use.
#3329
ClickHouse Release 18.12 {#clickhouse-release-18-12}
ClickHouse Release 18.12.17, 2018-09-16 {#clickhouse-release-18-12-17-2018-09-16}
New Features: {#new-features-2}
invalidate_query
(the abi... | {"source_file": "2018.md"} | [
-0.05221058055758476,
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... |
a1925cfd-2a08-4b2e-8d72-94827fc5f75b | Bug Fixes: {#bug-fixes-12}
Added a check for the sizes of arrays that are elements of
Nested
type fields when inserting.
#3118
Fixed an error updating external dictionaries with the
ODBC
source and
hashed
storage. This error occurred in version 18.12.13.
Fixed a crash when creating a temporary table from... | {"source_file": "2018.md"} | [
0.005489560775458813,
-0.011227955110371113,
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0.06428444385528564,
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... |
e71752ec-c9d4-4205-be37-f105bde54a11 | The
ProfileEvents
counters are applied globally and for each query, as well as for each query execution thread, which allows you to profile resource consumption by query in detail.
#2482
Added the
system.query_thread_log
table, which contains information about each query execution thread. Added the
log_query_th... | {"source_file": "2018.md"} | [
0.049315303564071655,
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0.024469943717122078,
-0.018... |
bb16376e-2560-40c6-9966-2185f96a7df0 | For a
CASE
expression with conditions, you can now omit
ELSE
, which is equivalent to
ELSE NULL
.
#2920
The operation timeout can now be configured when working with ZooKeeper.
urykhy
You can specify an offset for
LIMIT n, m
as
LIMIT n OFFSET m
.
#2840
You can use the
SELECT TOP n
syntax as an alterna... | {"source_file": "2018.md"} | [
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0.0... |
a3dc1f5a-e35d-49dc-bb34-a97c879cab09 | Fixed the "Not found column" error that occurred when executing distributed queries if a single column consisting of an IN expression with a subquery is requested from a remote server.
#3087
Fixed the
Block structure mismatch in UNION stream: different number of columns
error that occurred for distributed queries ... | {"source_file": "2018.md"} | [
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0.038334060460329056,
-0... |
0b059257-878f-4de9-8afe-41e5bfccffd7 | Build Changes: {#build-changes-2}
Most integration tests can now be run by commit.
Code style checks can also be run by commit.
The
memcpy
implementation is chosen correctly when building on CentOS7/Fedora.
Etienne Champetier
When using clang to build, some warnings from
-Weverything
have been added, in ... | {"source_file": "2018.md"} | [
-0.06210809201002121,
-0.023230984807014465,
0.005562697071582079,
-0.03957759961485863,
0.018851863220334053,
-0.12162264436483383,
-0.04107176512479782,
0.014098308980464935,
-0.04816523566842079,
0.05475924164056778,
0.005423251073807478,
-0.08223509788513184,
0.015795797109603882,
-0.0... |
40c0ae6c-090b-4da9-b406-d0f4f27d6c79 | Fixed a merge bug when all data parts were empty (parts that were formed from a merge or from
ALTER DELETE
if all data was deleted). This bug appeared in version 18.1.0.
#2930
Fixed an error for concurrent
Set
or
Join
.
Amos Bird
Fixed the
Block structure mismatch in UNION stream: different number of column... | {"source_file": "2018.md"} | [
-0.017814477905631065,
-0.007480795029550791,
0.005664929281920195,
0.024131620302796364,
-0.027429306879639626,
-0.08952080458402634,
-0.01931927539408207,
-0.05690241977572441,
0.01597040705382824,
0.04367855563759804,
-0.0003304076672066003,
-0.02878054976463318,
0.02733026258647442,
-0... |
212c2bb5-5824-467c-a1a5-751aae08af5d | Added case-insensitive versions of the
coalesce
,
ifNull
, and
nullIf functions
#2752
.
Bug Fixes: {#bug-fixes-15}
Fixed a possible bug when starting a replica
#2759
.
ClickHouse Release 18.4 {#clickhouse-release-18-4}
ClickHouse Release 18.4.0, 2018-07-28 {#clickhouse-release-18-4-0-2018-07-28}
N... | {"source_file": "2018.md"} | [
-0.031766779720783234,
0.0064687589183449745,
-0.030789285898208618,
-0.010177460499107838,
-0.019706491380929947,
-0.026455000042915344,
-0.0095553919672966,
-0.032204676419496536,
-0.03883941471576691,
0.10450512915849686,
0.03409226983785629,
-0.08558690547943115,
0.06768753379583359,
-... |
dcd11d0e-0fa6-4fa7-8204-5569225947ef | Support for arbitrary types for the
uniq*
family of aggregate functions (
#2010
).
Support for arbitrary types in comparison operators (
#2026
).
The
users.xml
file allows setting a subnet mask in the format
10.0.0.1/255.255.255.0
. This is necessary for using masks for IPv6 networks with zeros in the middle (... | {"source_file": "2018.md"} | [
-0.03827628493309021,
0.008394326083362103,
0.014012654311954975,
0.0006598021718673408,
-0.016905760392546654,
0.029263874515891075,
-0.04560406506061554,
-0.020194126293063164,
-0.0173458494246006,
-0.03176964819431305,
-0.03213877975940704,
-0.0006826529279351234,
-0.0709187462925911,
-... |
5b8a7a98-749f-4bc7-bfef-9c76e148464a | Now
OPTIMIZE TABLE ... FINAL
can be used without specifying partitions for
ReplicatedMergeTree
(
Amos Bird
).
Bug Fixes: {#bug-fixes-18}
Fixed a problem with a very small timeout for sockets (one second) for reading and writing when sending and downloading replicated data, which made it impossible to downlo... | {"source_file": "2018.md"} | [
0.032942034304142,
0.05712052062153816,
-0.02541622333228588,
0.005084822420030832,
0.028288908302783966,
-0.10019391030073166,
-0.020175879821181297,
0.012333729304373264,
-0.012791549786925316,
0.13742102682590485,
0.018492398783564568,
-0.048947349190711975,
0.02020769566297531,
-0.0138... |
ba043fb4-654c-4e9e-9363-4d81d3c900d4 | Bug Fixes: {#bug-fixes-19}
Fixed a bug when working with ZooKeeper that could make it impossible to recover the session and readonly states of tables before restarting the server.
Fixed a bug when working with ZooKeeper that could result in old nodes not being deleted if the session is interrupted.
Fixed an err... | {"source_file": "2018.md"} | [
-0.028703054413199425,
0.007816188037395477,
0.021405022591352463,
0.03499610349535942,
0.007163051050156355,
-0.08883451670408249,
0.007177051622420549,
0.05447331443428993,
-0.010071951895952225,
0.06845130026340485,
0.01736300066113472,
0.014743264764547348,
0.0221034474670887,
0.032517... |
a3086853-bb26-4628-898e-2f5441708196 | JIT compilation to native code is now available for some expressions (
pyos
).
Bug Fixes: {#bug-fixes-20}
Duplicates no longer appear for a query with
DISTINCT
and
ORDER BY
.
Queries with
ARRAY JOIN
and
arrayFilter
no longer return an incorrect result.
Fixed an error when reading an array column from... | {"source_file": "2018.md"} | [
-0.06565842032432556,
0.047510236501693726,
0.045016296207904816,
0.007420988287776709,
-0.06361640244722366,
-0.06861557811498642,
0.06176323443651199,
0.013201224617660046,
-0.041096281260252,
0.033041417598724365,
-0.02151043340563774,
-0.012331019155681133,
0.024737322703003883,
0.0427... |
57411814-73a3-478a-b072-c3a96ee92657 | The version of the librdkafka library has been updated to v0.11.4.
Added the ability to use the system libcpuid library. The library version has been updated to 0.4.0.
Fixed the build using the vectorclass library (
Babacar Diassé
).
Cmake now generates files for ninja by default (like when using
-G Ninja
).
A... | {"source_file": "2018.md"} | [
-0.04958254471421242,
0.017419980838894844,
-0.08122970163822174,
0.03661671653389931,
-0.03197643905878067,
0.03641141951084137,
-0.10825180262327194,
0.037053633481264114,
-0.02442571334540844,
-0.03380177170038223,
-0.010627145878970623,
-0.057862091809511185,
0.06886828690767288,
-0.08... |
b0cb619d-fba1-4262-8a78-d2e15279ec48 | Backward Incompatible Changes: {#backward-incompatible-changes-8}
Removed support for expressions like
(a, b) IN (SELECT (a, b))
(you can use the equivalent expression
(a, b) IN (SELECT a, b)
). In previous releases, these expressions led to undetermined
WHERE
filtering or caused errors.
ClickHouse Release... | {"source_file": "2018.md"} | [
0.008871003985404968,
-0.007964947260916233,
-0.01159331388771534,
0.003757331520318985,
-0.01218672376126051,
-0.0544450543820858,
-0.0023973749484866858,
-0.020291833207011223,
-0.04153534024953842,
0.07331572473049164,
0.016398433595895767,
-0.020080722868442535,
0.06900890171527863,
-0... |
bfecb9ff-6e38-456d-a3d2-ad00495bdee9 | The
max_execution_time
limit now works correctly with distributed queries.
Fixed errors when calculating the size of composite columns in the
system.columns
table.
Fixed an error when creating a temporary table
CREATE TEMPORARY TABLE IF NOT EXISTS.
Fixed errors in
StorageKafka
(##2075)
Fixed server crash... | {"source_file": "2018.md"} | [
0.005609096493571997,
-0.01655900478363037,
-0.036859169602394104,
0.026969369500875473,
-0.06840762495994568,
-0.06720957905054092,
-0.08939970284700394,
0.027991315349936485,
0.011268776841461658,
0.10608028620481491,
-0.013744323514401913,
-0.0680718868970871,
0.03807949647307396,
-0.01... |
d778b627-a45e-454e-af51-50bbed8bfb4d | Improvements: {#improvements-14}
When inserting data in a
Replicated
table, fewer requests are made to
ZooKeeper
(and most of the user-level errors have disappeared from the
ZooKeeper
log).
Added the ability to create aliases for data sets. Example:
WITH (1, 2, 3) AS set SELECT number IN set FROM system.nu... | {"source_file": "2018.md"} | [
0.012180004268884659,
0.013595751486718655,
0.03614947199821472,
0.014646811410784721,
-0.016368096694350243,
-0.0909978523850441,
-0.08015196025371552,
-0.016056260094046593,
-0.01636083610355854,
0.07594213634729385,
0.008692831732332706,
-0.001322177005931735,
0.04372352361679077,
-0.01... |
e58a1f30-28d4-495a-8669-993214e17901 | Added functions:
arrayAny
,
arrayAll
,
hasAny
,
hasAll
,
arrayIntersect
,
arrayResize
.
Added the
arrayCumSum
function (Javi Santana).
Added the
parseDateTimeBestEffort
,
parseDateTimeBestEffortOrZero
, and
parseDateTimeBestEffortOrNull
functions to read the DateTime from a string containing text in a w... | {"source_file": "2018.md"} | [
0.06851853430271149,
-0.031365085393190384,
-0.12519001960754395,
0.05572778359055519,
-0.026160718873143196,
-0.021943597123026848,
0.01881382241845131,
0.03512932360172272,
-0.08713481575250626,
0.046511564403772354,
0.022692782804369926,
-0.05134326592087746,
0.039121612906455994,
-0.08... |
87cc29ee-5852-4cf1-8df8-3d20d10004e1 | Support for rows and arbitrary numeric types for the
library
dictionary source.
MergeTree
tables can be used without a primary key (you need to specify
ORDER BY tuple()
).
A
Nullable
type can be
CAST
to a non-
Nullable
type if the argument is not
NULL
.
RENAME TABLE
can be performed for
VIEW
.
Added... | {"source_file": "2018.md"} | [
-0.011536620557308197,
-0.06292381882667542,
-0.04949512332677841,
-0.010837067849934101,
-0.026028597727417946,
-0.12145969271659851,
0.007341743912547827,
0.07585368305444717,
-0.00023640839208383113,
0.07482269406318665,
0.010999707505106926,
0.0750039666891098,
0.01510528102517128,
-0.... |
1105758e-82af-4a09-8f37-e3403600c5d0 | Fixed the order of the
source
and
last_exception
columns in the
system.dictionaries
table.
Fixed a bug when the
DROP DATABASE
query did not delete the file with metadata.
Fixed the
DROP DATABASE
query for
Dictionary
databases.
Fixed the low precision of
uniqHLL12
and
uniqCombined
functions for car... | {"source_file": "2018.md"} | [
0.0328187569975853,
-0.025120647624135017,
0.051070619374513626,
0.03972318023443222,
0.03271268308162689,
-0.08318164199590683,
-0.07807645946741104,
0.018072478473186493,
0.02318836748600006,
0.0686846598982811,
0.013194505125284195,
0.054844386875629425,
0.04387199878692627,
-0.00623189... |
3097f7a1-058a-46b6-93fc-6640d4814174 | Now queries like
SELECT ... FROM table WHERE expr IN (subquery)
are processed using the
table
index.
Improved processing of duplicates when inserting to Replicated tables, so they no longer slow down execution of the replication queue.
ClickHouse Release 1.1.54342, 2018-01-22 {#clickhouse-release-1-1-54342-20... | {"source_file": "2018.md"} | [
-0.008338682353496552,
-0.07251893728971481,
0.01632746309041977,
0.05995652452111244,
0.005667452700436115,
-0.12112586200237274,
-0.03657080605626106,
-0.07907097041606903,
0.018793592229485512,
0.10569753497838974,
0.025251636281609535,
0.07460453361272812,
0.07156115025281906,
-0.01166... |
abe19e60-8c1f-4ad8-bd53-83c06a1042c9 | Added a column with documentation for the
system.settings
table (Kirill Shvakov).
Added the
system.parts_columns
table with information about column sizes in each data part of
MergeTree
tables.
Added the
system.models
table with information about loaded
CatBoost
machine learning models.
Added the
mysql... | {"source_file": "2018.md"} | [
0.0036865377333015203,
-0.05630698427557945,
-0.08904622495174408,
0.031751085072755814,
-0.016287682577967644,
-0.026927229017019272,
0.004729509819298983,
0.048718638718128204,
-0.04570745676755905,
0.044958822429180145,
-0.06799846887588501,
-0.0053111775778234005,
0.01939462311565876,
... |
9bfaaa92-2af6-44ad-bacb-bfb433a7018c | Improved performance of parsing and formatting
Date
and
DateTime
type values in text format.
Improved performance and precision of parsing floating point numbers.
Lowered memory usage for
JOIN
in the case when the left and right parts have columns with identical names that are not contained in
USING
.
Imp... | {"source_file": "2018.md"} | [
-0.030794309452176094,
-0.005842804443091154,
0.05281049758195877,
0.021596940234303474,
-0.00803949125111103,
-0.03104567900300026,
0.0011921939440071583,
0.05971607565879822,
-0.015989841893315315,
0.010359042324125767,
0.025154003873467445,
-0.011233669705688953,
-0.0005526722525246441,
... |
7555c764-dee6-4949-8bcc-c0f83246d3b3 | Fixed various bugs related to internal semantics of data types. Examples: unnecessary summing of
Enum
type fields in
SummingMergeTree
; alignment of
Enum
types in
Pretty
formats, etc.
Stricter checks for allowed combinations of composite columns.
Fixed the overflow when specifying a very large parameter for... | {"source_file": "2018.md"} | [
-0.0245536919683218,
-0.004279244691133499,
0.044533416628837585,
-0.01497249398380518,
-0.061037562787532806,
-0.06967177242040634,
-0.0771181508898735,
-0.0017377006588503718,
-0.047158047556877136,
0.03481362760066986,
-0.0033057592809200287,
-0.002477576257660985,
0.005121167283505201,
... |
b7d73b6f-858b-4c21-8d92-a7909043a53f | Extracted
clickhouse_parsers
and
clickhouse_common_io
libraries to speed up builds of various tools.
Backward Incompatible Changes: {#backward-incompatible-changes-11}
The format for marks in
Log
type tables that contain
Nullable
columns was changed in a backward incompatible way. If you have these tabl... | {"source_file": "2018.md"} | [
0.08451944589614868,
-0.0705794170498848,
-0.00483959075063467,
0.029273631051182747,
-0.009288247674703598,
-0.06010599806904793,
-0.018603960052132607,
-0.007104703225195408,
-0.08701185882091522,
0.058554090559482574,
0.04288801550865173,
-0.03073093108832836,
0.004220983013510704,
0.00... |
309a8de2-dec6-43ac-a317-36ee36731fc4 | title: 'chDB for Bun'
sidebar_label: 'Bun'
slug: /chdb/install/bun
description: 'How to install and use chDB with Bun runtime'
keywords: ['chdb', 'bun', 'javascript', 'typescript', 'embedded', 'clickhouse', 'sql', 'olap']
doc_type: 'guide'
chDB for Bun
chDB-bun provides experimental FFI (Foreign Function Interfac... | {"source_file": "bun.md"} | [
0.05846887826919556,
-0.0805511549115181,
-0.023839682340621948,
0.019722679629921913,
-0.03697221353650093,
0.034294694662094116,
-0.0006660296348854899,
0.06813792884349823,
-0.0781620442867279,
0.004971688613295555,
-0.029287779703736305,
-0.057900357991456985,
-0.0005861989338882267,
-... |
fc817f42-75c9-4539-86b7-3f0a505c068a | // Aggregate queries
const stats = sess.query(`
SELECT
COUNT(*) as total_users,
MAX(id) as max_id,
MIN(id) as min_id
FROM mydb.users
`, "JSON");
console.log("Statistics:", stats);
} finally {
// Always cleanup the session to free resources
sess.cleanup(); // This deletes the ... | {"source_file": "bun.md"} | [
0.023453248664736748,
0.021530020982027054,
-0.032113559544086456,
0.09698992967605591,
-0.05433112010359764,
-0.026292666792869568,
0.0739874467253685,
0.10077885538339615,
0.02674059383571148,
-0.008037598803639412,
-0.014820707030594349,
0.021433696150779724,
0.051948267966508865,
-0.02... |
251ac3f4-c3d0-4a4e-a9ea-12bec3164711 | title: 'chDB for Go'
sidebar_label: 'Go'
slug: /chdb/install/go
description: 'How to install and use chDB with Go'
keywords: ['chdb', 'go', 'golang', 'embedded', 'clickhouse', 'sql', 'olap']
doc_type: 'guide'
chDB for Go
chDB-go provides Go bindings for chDB, enabling you to run ClickHouse queries directly in you... | {"source_file": "go.md"} | [
0.07370011508464813,
-0.03148926421999931,
-0.059890516102313995,
-0.007360768970102072,
-0.08642612397670746,
0.0435224287211895,
0.02611537091434002,
0.05092239752411842,
-0.03869638592004776,
-0.04773851856589317,
0.018297994509339333,
-0.025517698377370834,
0.03428792953491211,
0.01233... |
1a5e52c5-2dd8-429b-b283-2dcf643365ea | for rows.Next() {
var count int
err := rows.Scan(&count)
if err != nil {
panic(err)
}
fmt.Printf("Count: %d\n", count)
}
}
```
Query streaming for large datasets {#query-streaming}
For processing large datasets that don't fit in memory, use streaming queries:
```go
package main
im... | {"source_file": "go.md"} | [
0.034076593816280365,
0.007089779246598482,
-0.09442980587482452,
0.01899361051619053,
-0.011619765311479568,
-0.032639335840940475,
0.058855436742305756,
0.05122239515185356,
-0.00394437275826931,
-0.0013929161941632628,
-0.02211756631731987,
-0.009382525458931923,
-0.0017626514891162515,
... |
fdfac210-615c-4551-9c74-48c7e4939af9 | title: 'Installing chDB for Python'
sidebar_label: 'Python'
slug: /chdb/install/python
description: 'How to install chDB for Python'
keywords: ['chdb', 'embedded', 'clickhouse-lite', 'python', 'install']
doc_type: 'guide'
Requirements {#requirements}
Python 3.8+
Supported platforms: macOS and Linux (x86_64 a... | {"source_file": "python.md"} | [
0.05387163162231445,
0.015256650745868683,
-0.014412716962397099,
0.07189347594976425,
-0.08322107791900635,
-0.005507079418748617,
0.05805840343236923,
0.04440600797533989,
-0.04514176398515701,
-0.02464911714196205,
0.015431535430252552,
-0.0727207288146019,
0.11261337995529175,
-0.05250... |
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