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447 Commits

Author SHA1 Message Date
Dmitry Novik
bfdd34c13d code cleanup 2021-10-11 17:39:24 +03:00
Dmitry Novik
7c3192735a Reset profile events stream in Connection::sendQuery 2021-10-11 17:39:24 +03:00
Dmitry Novik
9f9af28b5e Output memory usage with progress 2021-10-11 17:39:24 +03:00
Dmitry Novik
73df6190df Cleanup code 2021-10-11 17:39:24 +03:00
Dmitry Novik
7e3caf96be Fix cores approximation 2021-10-11 17:39:24 +03:00
Dmitry Novik
4c6b3c40f2 Calculate approximate cores number used 2021-10-11 17:39:24 +03:00
Dmitry Novik
15ac65aa33 Add thread usage info on client side 2021-10-11 17:39:24 +03:00
Dmitry Novik
356723427d WIP on ProfileEvents forwarding 2021-10-11 17:39:23 +03:00
Dmitry Novik
362bcb2f66 Introduce ProfileEvents packet 2021-10-11 17:29:50 +03:00
Nikolai Kochetov
a95c28ec4b
Merge pull request #29898 from ClickHouse/remove-native-stream 
Remove some more streams.
 2021-10-10 21:01:16 +03:00
Alexey Milovidov
103b3c91ba Remove 'printf' function usage. 2021-10-10 04:21:07 +03:00
Nikolai Kochetov
c6bce1a4cf Update Native. 2021-10-08 20:21:19 +03:00
Nikolai Kochetov
340b53ef85 Remove some more streams. 2021-10-08 17:03:54 +03:00
kssenii
c734ada95b Fix 2021-10-07 20:28:38 +00:00
Azat Khuzhin
bbee102e58 Fix --stage for clickhouse-local 
This also fixes UBsan error, since query_processing_stage was not
initialized before for clickhouse-local.
 2021-10-04 21:00:48 +03:00
Kseniia Sumarokova
ddc775b1c8
Merge pull request #29626 from kssenii/fix-signals 
Follow-up for #26231
 2021-10-03 22:13:54 +03:00
Kseniia Sumarokova
ad0fcda713
Update ClientBase.h 2021-10-03 12:11:59 +03:00
kssenii
aa539937fb Fix build check 2021-10-03 06:23:05 +00:00
kssenii
0ed92d85e2 Fix 2021-10-02 13:05:19 +00:00
kssenii
e10255bba3 Fix 2021-10-02 08:10:34 +00:00
Alexey Milovidov
fe6b7c77c7 Rename "common" to "base" 2021-10-02 10:13:14 +03:00
kssenii
dabab85c60 Fix 2021-10-01 17:31:00 +00:00
kssenii
05181c6900 Fix 2021-10-01 14:13:02 +00:00
kssenii
59cbe8579d Interrupt listener 2021-09-29 22:01:52 +00:00
kssenii
07b979bda3 Rewrite to processors 2021-09-29 19:17:02 +00:00
kssenii
2c005db9ad Merge branch 'master' of https://github.com/ClickHouse/ClickHouse into interactive-mode-for-clickhouse-local 2021-09-29 17:45:15 +00:00
Nikolai Kochetov
78a7665f43 Merge branch 'master' into rewrite-pushing-to-views 2021-09-27 10:56:50 +03:00
kssenii
8e200b68a4 Small fix 2021-09-26 21:22:04 +00:00
kssenii
2129230b1e Merge branch 'master' of https://github.com/ClickHouse/ClickHouse into interactive-mode-for-clickhouse-local 2021-09-25 09:16:05 +00:00
kssenii
f3784780fd Fixes 2021-09-25 08:46:57 +00:00
Alexey Milovidov
cd7f9d981c Remove ya.make 2021-09-25 04:22:54 +03:00
Nikolai Kochetov
998d29ebc7 Merge branch 'master' into rewrite-pushing-to-views 2021-09-23 13:10:27 +03:00
Azat Khuzhin
015695b3bf Fix connection timeouts (send_timeout/receive_timeout) 
Query is not executed within sendQuery() function.

INSERT query consist from multiple parts:
- sendQuery()
- write()/writePrepared() -- send Data blocks
- writeSuffix() -- send empty Data block and receive EndOfStream
(see RemoteBlockOutputStream for more info)
So as you can see it is not executed completely from the sendQuery() function.

SELECT query (and others) also send Data blocks to the client after.

And what this means that temporary timeout (via TimeoutSetter) is not
enough, since next query can use timeout from the previous query.

Usually you do not see it, because:
- You don't use custom send_timeout/receive_timeout
- SELECT is fast enough

However it is not the case with INSERT, especially with
insert_distributed_sync=1, since
DistributedBlockOutputStream::writeSuffix() may stack because remote
server still INSERT'ing the data (i.e. creating znodes in zookeeper for
ReplicatedMergeTree, syncing blocks, and similar) that was issued from
DistributedBlockOutputStream::write(), and it will lead to the following
exception:

    Code: 209, e.displayText() = DB::NetException: Timeout exceeded while reading from socket (127.1:9000): while receiving packet from ch-47-drt.dpa.semrush.net:9000: Insertion status:
    Wrote X blocks and Y rows on shard Z replica 0, 127.1:9000 (average 0 ms per block, the slowest block N ms)
    0. DB::Exception::Exception()
    1. DB::ReadBufferFromPocoSocket::nextImpl()
    2. void DB::readVarUIntImpl<false>(unsigned long&, DB::ReadBuffer&)
    3. DB::Connection::receivePacket()
    4. DB::RemoteBlockOutputStream::writeSuffix()
    ...
 2021-09-23 09:03:13 +03:00
kssenii
04575eb12b Review fixes, fix style check and clang-tidy 2021-09-22 21:35:29 +00:00
Azat Khuzhin
e5f66fd103 Add socket timeout values into SOCKET_TIMEOUT exception 2021-09-20 09:51:42 +03:00
kssenii
8d19ed5ee7 Fix remaining tests 2021-09-20 05:39:13 +00:00
kssenii
db45363c19 Fix tests 2021-09-19 18:42:45 +00:00
kssenii
3b4843a1a9 Apply changed from pr 27135 2021-09-16 18:44:42 +00:00
kssenii
55619dcc1b Correct merge 2021-09-16 16:14:17 +00:00
kssenii
c88dc460d4 Merge branch 'master' of https://github.com/ClickHouse/ClickHouse into interactive-mode-for-clickhouse-local 2021-09-16 16:13:04 +00:00
Nikolai Kochetov
b997214620 Rename QueryPipeline to QueryPipelineBuilder. 2021-09-14 20:48:18 +03:00
kssenii
4605299262 Correct merge 2021-09-13 06:45:27 +00:00
Sergei Semin
f74350c148 fix special build 2021-09-12 02:49:31 +03:00
kssenii
33ff6ec060 Fix tests 2021-09-11 17:17:48 +00:00
kssenii
7f1770cc3c Fix contexts 2021-09-11 12:03:28 +00:00
kssenii
ca81c13775 Move readArguments to base 2021-09-11 11:49:42 +00:00
kssenii
ddfe1e4d64 Some fixes 2021-09-11 11:34:22 +00:00
kssenii
fa04b13175 Break some tests 2021-09-09 13:25:25 +00:00
kssenii
8f77855981 Some review fixes 2021-09-05 00:52:35 +03:00
kssenii
1c20b223cb Merge branch 'master' of github.com:ClickHouse/ClickHouse into interactive-mode-for-clickhouse-local 2021-09-04 20:01:31 +03:00
Alexey Milovidov
19445ac096 Drop unused headers 2021-09-01 02:47:52 +03:00
Dmitrii Kovalkov
9871ad70ff Exclude fuzzers 2021-08-30 11:12:25 +03:00
kssenii
578a750b8b Small clean up 2021-08-27 11:47:47 +03:00
kssenii
7d6f3d96c1 Better 2021-08-23 13:01:42 +03:00
kssenii
95645e8f26 Fix progress 2021-08-23 10:13:27 +03:00
kssenii
deeb942ccb Fix 2021-08-21 21:42:59 +03:00
kssenii
1f0bb0d81b Reorganize a bit more, fix tests 2021-08-21 18:17:02 +03:00
kssenii
3a39e3f039 Reorganize options 2021-08-21 00:39:28 +03:00
kssenii
21f9622cad Reorganize multiquery processing 2021-08-20 23:39:13 +03:00
kssenii
41d735fd56 Fix context 2021-08-20 15:16:13 +03:00
kssenii
39e80a47a3 Merge branch 'master' of github.com:ClickHouse/ClickHouse into interactive-mode-for-clickhouse-local 2021-08-20 10:13:58 +03:00
kssenii
ceca7a7e2c Fix some tests 2021-08-19 23:27:40 +03:00
kssenii
b5f6a7cb97 Fix local 2021-08-19 14:07:47 +03:00
kssenii
d1484a6f2e Use more client code than local, hope tests survive 2021-08-19 00:01:17 +03:00
kssenii
e187bb781c Move everything to base 2021-08-18 17:39:04 +03:00
kssenii
fb0b445ee0 Lets add LocalConnection (a start) 2021-08-17 22:59:51 +03:00
Amos Bird
27ff081403
Fix some leftover TODOs 2021-08-17 17:22:12 +08:00
kssenii
cefd9b473e Merge branch 'master' of github.com:ClickHouse/ClickHouse into interactive-mode-for-clickhouse-local 2021-08-16 16:41:24 +03:00
kssenii
30cc705464 Merge branch 'master' of github.com:ClickHouse/ClickHouse into interactive-mode-for-clickhouse-local 2021-08-07 22:53:50 +03:00
kssenii
9f9be65ac7 Merge branch 'master' of github.com:ClickHouse/ClickHouse into interactive-mode-for-clickhouse-local 2021-08-05 10:42:32 +03:00
kssenii
b5b9624cca Fixes, add test 2021-08-03 23:49:16 +03:00
kssenii
f6e45b3193 Fix tests, style. Better cancel query 2021-08-02 17:46:21 +03:00
Nikolai Kochetov
6951e8147d
Merge pull request #27020 from amosbird/shardlevelconstness 
Shard-level const column
 2021-08-02 13:45:20 +03:00
kssenii
6d4440836b Process SIGINT in interactive mode 2021-08-02 01:22:07 +03:00
kssenii
3982031215 Completion for clickhouse-local 2021-08-01 23:28:39 +03:00
Amos Bird
b76a854f5a
backward compatible 2021-08-01 09:06:16 +08:00
kssenii
6e8eb598bf Some review fixes 2021-07-31 15:34:29 +03:00
kssenii
c9e607f1e8 Progress for interactive clickhouse local 2021-07-31 15:08:30 +03:00
kssenii
48f4f2a0c2 Merge branch 'master' of github.com:ClickHouse/ClickHouse into interactive-mode-for-clickhouse-local 2021-07-29 18:41:54 +03:00
kssenii
3f259e195b Better 2021-07-29 15:58:50 +03:00
Nikolai Kochetov
cfa3fd4b87 Hold context in HedgedConnections to prevent use-after-free on settings. 2021-07-29 13:29:36 +03:00
kssenii
22e3bde548 Refactoring, fix test, fix local interactive 2021-07-29 12:45:58 +03:00
kssenii
62d1e18b7f Refactoring 2021-07-28 18:54:32 +03:00
kssenii
fb18f7fc72 Fix tests 2021-07-27 17:15:31 +03:00
Nikolai Kochetov
a9effdad18 Merge branch 'master' into output-streams-to-processors 2021-07-27 11:31:53 +03:00
kssenii
d30f54b335 Refactoring, fix tests 2021-07-27 01:28:27 +03:00
Nikolai Kochetov
7da5bb3871 Do not start new hedged connection if query was already canceled. 2021-07-26 20:48:38 +03:00
Nikolai Kochetov
61d8f880cd Rename some files. 2021-07-26 19:48:25 +03:00
kssenii
4886d931a1 Fix some tests 2021-07-26 11:24:04 +03:00
alexey-milovidov
7b76bfc719
Merge pull request #26318 from amosbird/connectionpoolfactory 
Connection pool cache
 2021-07-26 06:45:03 +03:00
Amos Bird
2ba6ef1487
Better implementation 2021-07-24 18:02:51 +08:00
kssenii
4dbb2e5bd8 Merge branch 'master' of github.com:ClickHouse/ClickHouse into interactive-mode-for-clickhouse-local 2021-07-24 00:36:25 +03:00
kssenii
accd6d5c0f Refactoring 2021-07-24 00:32:38 +03:00
kssenii
8c05e4f038 Refactoring 2021-07-23 23:54:49 +03:00
vdimir
dccc379d39
Fix use after free in AsyncDrain connection from S3Cluster 2021-07-23 10:40:03 +03:00
kssenii
59b0ce21e4 Tiny refactoring 2021-07-23 00:27:26 +03:00
kssenii
b337f481dc Merge branch 'master' of github.com:ClickHouse/ClickHouse into interactive-mode-for-clickhouse-local 2021-07-22 22:24:19 +03:00
Nikolai Kochetov
20b2837b27 Fix destructor for PocoSocketWrapper. 2021-07-20 16:50:31 +03:00
Amos Bird
dbfb699690
Asynchronously drain connections. 2021-07-19 21:53:29 +08:00
kssenii
022a0e00f2 Refactor client, merging non-interactive 2021-07-18 23:18:11 +03:00
kssenii
bb0f0c18b2 Merge branch 'master' of github.com:ClickHouse/ClickHouse into interactive-mode-for-clickhouse-local 2021-07-18 18:12:53 +03:00
Nikolai Kochetov
0d549c197f Fix 01822_async_read_from_socket_crash for hedged connection. 2021-07-16 13:42:22 +03:00
kssenii
ae4644d05a Fix some tests 2021-07-15 10:02:14 +03:00
Amos Bird
3f05211b09
Connection pool factory. 2021-07-15 00:01:45 +08:00
kssenii
7a57f2a983 Turn on fuzzing, fix tests 2021-07-12 20:26:21 +03:00
kssenii
bc3c038ac7 Better 2021-07-12 17:01:46 +03:00
kssenii
9ff54216ea More merges in query execution code 2021-07-12 15:25:17 +03:00
kssenii
e31eccfaf2 Support multiquery option 2021-07-12 12:34:37 +03:00
kssenii
a10b9ed63a Start merging query processing code 2021-07-12 02:17:14 +03:00
kssenii
d58a5537c2 Fix details 2021-07-12 00:54:41 +03:00
kssenii
026fa0ca64 Merge main, mainImpl code, allow interactive mode for clickhouse-local 2021-07-11 23:35:29 +03:00
kssenii
0b5dab1326 Merge init code for local and client 2021-07-11 14:36:27 +03:00
alexey-milovidov
aca575cc85
Merge branch 'master' into refactor-pipeline-executor 2021-07-04 02:08:31 +03:00
Alexey Milovidov
e3653e70da Update prompt in client when reconnecting 2021-06-15 04:43:35 +03:00
Alexey Milovidov
273226de32 Remove string parameter for Density 2021-05-24 06:43:25 +03:00
Alexey Milovidov
40d4f0678f Remove overload (harmful) 2021-05-23 04:25:06 +03:00
fibersel
cb53bbb7b0 add experimental codecs flag, add integration test for experimental codecs 2021-05-06 14:57:22 +03:00
alexey-milovidov
7ca42d2ce1
Merge pull request #23805 from ClickHouse/fix-hedged-requests-ext-tables 
Fix sending external table for hedged connections.
 2021-05-01 08:13:13 +03:00
Nikolai Kochetov
352ec049ad Fix sending external table for hedged connections. 2021-04-30 17:19:48 +03:00
Maksim Kita
318c4bb80d Add examples folder filter to ya.make.in 2021-04-30 11:25:52 +03:00
Maksim Kita
0d0a14a925 Poco::Timespan reference fix 2021-04-29 19:11:20 +03:00
Nikita Mikhaylov
9f55424250 move to examples everywhere 2021-04-27 01:51:42 +03:00
Nikolai Kochetov
548fb52d24 Fix build. 2021-04-20 08:51:51 +03:00
Nikolai Kochetov
08d1896950 Fix build. 2021-04-19 22:06:05 +03:00
Nikolai Kochetov
0420b7bb33 Reset replica state in MultiplexedConnections in case of exception. 2021-04-19 17:25:43 +03:00
Alexey Milovidov
17d04cbca9 Merge branch 'master' into protocol-compression-auto 2021-04-15 00:24:07 +03:00
Alexey Milovidov
6f56c3280f Uncompress data in Distributed sends if needed 2021-04-14 00:53:39 +03:00
Nikita Mikhaylov
024374a2ec review fixes 2021-04-13 22:39:43 +03:00
Nikita Mikhaylov
7a68820342 style 2021-04-13 22:39:42 +03:00
Nikita Mikhaylov
c333c3dedb review fixes 2021-04-13 22:39:42 +03:00
Nikita Mikhaylov
36a8419f60 style 2021-04-13 22:39:42 +03:00
Nikita Mikhaylov
2555ae5d3f better processing stage 2021-04-13 22:39:42 +03:00
Nikita Mikhaylov
4843f86329 use only one connection between initiator and worker 2021-04-13 22:39:42 +03:00
Nikita Mikhaylov
e601a432e5 better[2] 2021-04-13 22:39:42 +03:00
Nikita Mikhaylov
cef9e19eb2 better 2021-04-13 22:39:41 +03:00
Nikita Mikhaylov
2549468c14 better 2021-04-13 22:39:41 +03:00
Nikita Mikhaylov
64b4cd0e63 save 2021-04-13 22:39:41 +03:00
Nikita Mikhaylov
31b4f9b17f save 2021-04-13 22:39:41 +03:00
Nikita Mikhaylov
44ca65a9a4 save 2021-04-13 22:39:41 +03:00
Alexey Milovidov
fafe8c00fe Fix warning #22987 2021-04-12 20:57:03 +03:00
Ivan
495c6e03aa
Replace all Context references with std::weak_ptr (#22297) 
* Replace all Context references with std::weak_ptr

* Fix shared context captured by value

* Fix build

* Fix Context with named sessions

* Fix copy context

* Fix gcc build

* Merge with master and fix build

* Fix gcc-9 build
 2021-04-11 02:33:54 +03:00
Pavel Kruglov
6f65a72112 Remove socket from epoll before cancelling packet receiver to prevent race 2021-04-01 17:35:00 +03:00
alexey-milovidov
25f02f13b0
Merge pull request #22238 from ClickHouse/remove-harmful-code 
Remove harmful default parameters
 2021-03-29 23:46:18 +03:00
Alexey Milovidov
169369e90f Remove harmful default parameters 2021-03-29 04:08:28 +03:00
Alexey Milovidov
b336de9ebd Remove harmful default arguments 2021-03-29 04:07:42 +03:00
Pavel Kruglov
90afc9ce2f Fix build 2021-03-26 21:25:30 +03:00
Pavel Kruglov
2979feb23f Prevent busy waiting in hedged requests when async_socket_for_remote=0 2021-03-26 18:11:06 +03:00
Kruglov Pavel
66b8431e71
Merge pull request #21429 from Avogar/secure-socket 
Fix receive and send timeouts and non-blocking read in secure socket
 2021-03-25 17:30:17 +03:00
Azat Khuzhin
17eaddc3ab Prevent hedged connections overlaps 
Some replicas may be in the establishing state, this means that hedged
connection is waiting for TablesStatusResponse, and if the connection
will not be canceled, then next user of the connection will get
TablesStatusResponse, while this is not the expected package, and you
will see:

    DB::Exception: Received from localhost:9000. DB::Exception: Received from ch-1:9000. DB::Exception: Unknown packet 9 from server ch-2:9000: While executing Remote. Stack trace:

Fix this by disconnecting connection to such replicas, note that this
should be fine in general, since they are "slow" anyway (you may wish
configure hedged requests settings to increase timeouts and similar).
 2021-03-20 19:05:29 +03:00
Kruglov Pavel
055242fe95
Style 2021-03-19 01:38:15 +03:00
Pavel Kruglov
d380454044 Change read_data_timeout from sec to ms, add profile event for hedged requests and better process receiving packets 2021-03-18 20:16:17 +03:00
Pavel Kruglov
dbae58f30b Add slowdown_count and show actual information in system.clusters 2021-03-06 02:45:17 +03:00
Pavel Kruglov
c113af39f4 Merge branch 'master' of github.com:ClickHouse/ClickHouse into secure-socket 2021-03-05 16:18:45 +03:00
Pavel Kruglov
1c7f16e0ff Add test and move TimeoutSetter in IO/ 2021-03-03 20:47:27 +03:00
Pavel Kruglov
dc9dd8ccdc Fix typo 2021-03-03 16:16:17 +03:00
Pavel Kruglov
82a6be44cf Disable changing replica when we have made progress 2021-03-03 01:03:03 +03:00
Pavel Kruglov
4166ae1f45 Restart timeout when we make progress 2021-03-02 15:40:24 +03:00
Pavel Kruglov
1b1f50e324 Update comment 2021-02-27 11:45:32 +03:00
Pavel Kruglov
4d7ba0443f Add checking pending data 2021-02-27 11:40:03 +03:00
Kruglov Pavel
cb638e0f87
Fix style 2021-02-26 21:06:17 +03:00
Pavel Kruglov
91f6f9227b Small fixes and tests updates 2021-02-26 18:55:58 +03:00
Pavel Kruglov
24e9abddb8 Fix 2021-02-24 15:11:07 +03:00
Pavel Kruglov
5628fd6da5 Small update 2021-02-24 02:22:07 +03:00
Pavel Kruglov
edee592cb0 Fix 2021-02-22 20:57:44 +03:00
Pavel Kruglov
1dbab60235 Fix 2021-02-22 10:52:19 +03:00
Pavel Kruglov
6d8eb44c01 Fix PSV and remove debug logging 2021-02-22 00:59:07 +03:00
Pavel Kruglov
4320782032 Style 2021-02-21 20:43:36 +03:00
Pavel Kruglov
db591309a3 fix style 2021-02-21 17:51:36 +03:00
Pavel Kruglov
93162716f4 remove logging 2021-02-21 17:50:47 +03:00
Pavel Kruglov
dd5185c779 Refactor 4.0 2021-02-21 17:03:24 +03:00
Pavel Kruglov
9bd9ea9fbc Try to fix sigsev 2021-02-20 00:45:58 +03:00
Pavel Kruglov
2f5b4c20ae Fix 2021-02-18 14:21:48 +03:00
Pavel Kruglov
80b6db7f72 Style 2021-02-17 22:07:14 +03:00
Pavel Kruglov
bc6fe4f28c Minor fixes 2021-02-17 20:44:11 +03:00
Pavel Kruglov
1b78de2142 Use fibers in HedgedRequests 2021-02-17 20:34:52 +03:00
Pavel Kruglov
c57daf2140 Merge branch 'hedged-requests' of github.com:Avogar/ClickHouse into hedged-requests 2021-02-17 20:34:11 +03:00
Pavel Kruglov
0e1d67ad9a Add LOG_DEBUG to debug test_distributed_load_balancing 2021-02-16 10:56:45 +03:00
Kruglov Pavel
6dcb306060
Style 2021-02-16 00:46:51 +03:00
Kruglov Pavel
28dec516ac
Style 2021-02-15 19:12:03 +03:00
Pavel Kruglov
eb0847e2b6 Style 2021-02-15 17:44:05 +03:00
Pavel Kruglov
df09a5cac9 Refactor 3.0 and fix tests 2021-02-15 16:21:36 +03:00
Pavel Kruglov
4cc7e2c5c6 Update comment 2021-02-09 05:13:47 +03:00
Pavel Kruglov
22b8bc6c99 Refactor 2.0 2021-02-09 05:01:09 +03:00
Pavel Kruglov
df5dc102c4 Don't use 'ReplicaStatePtr &' to prevent use-after-free 2021-02-08 23:58:02 +03:00
Pavel Kruglov
a594c738c2 Remove code duplication 2021-02-08 17:14:36 +03:00
Pavel Kruglov
7b45860b06 Style fix 2021-02-08 17:02:11 +03:00
Pavel Kruglov
134a686fa5 Fix 2 2021-02-08 16:16:09 +03:00
Pavel Kruglov
d3ebf59376 Fix 2021-02-08 16:08:15 +03:00
Pavel Kruglov
12b925dd7a Small update 2021-02-08 14:06:45 +03:00
Kruglov Pavel
636ef5394b
Remove redundant field 2021-02-07 01:45:11 +03:00
Pavel Kruglov
3d8e05dc94 Fix style 2021-02-07 00:54:29 +03:00
Pavel Kruglov
8ff3dde290 Add sendIgnoredPartUUIDs to HedgedRequests 2021-02-06 18:26:36 +03:00
Pavel Kruglov
f946aab759 Merge branch 'master' of github.com:ClickHouse/ClickHouse into hedged-requests 2021-02-06 17:38:56 +03:00
Pavel Kruglov
794f185442 Fix 2021-02-06 17:23:48 +03:00
Pavel Kruglov
0704d3cf27 Refactor 2021-02-06 03:54:27 +03:00
Pavel Kruglov
3fc8b294e8 Reset changes in tryGetEntry 2021-02-03 15:56:42 +03:00
Pavel Kruglov
b8ae9caa61 Fix style 2021-02-03 14:27:26 +03:00
Aleksei Semiglazov
921518db0a CLICKHOUSE-606: query deduplication based on parts' UUID 
* add the query data deduplication excluding duplicated parts in MergeTree family engines.

query deduplication is based on parts' UUID which should be enabled first with merge_tree setting
assign_part_uuids=1

allow_experimental_query_deduplication setting is to enable part deduplication, default ot false.

data part UUID is a mechanism of giving a data part a unique identifier.
Having UUID and deduplication mechanism provides a potential of moving parts
between shards preserving data consistency on a read path:
duplicated UUIDs will cause root executor to retry query against on of the replica explicitly
asking to exclude encountered duplicated fingerprints during a distributed query execution.

NOTE: this implementation don't provide any knobs to lock part and hence its UUID. Any mutations/merge will
update part's UUID.

* add _part_uuid virtual column, allowing to use UUIDs in predicates.

Signed-off-by: Aleksei Semiglazov <asemiglazov@cloudflare.com>

address comments
 2021-02-02 16:53:39 +00:00
Pavel Kruglov
2c928f11e1 Remove code duplication 2021-02-02 19:39:30 +03:00
Pavel Kruglov
02cc43502e Remove LOG_DEBUG 2021-02-02 15:17:06 +03:00