Before this patch SELECT queries hold parts even if they were not
required by select (had been eliminated by partition pruning).
This defers removing parts if you have long running queries.
This had been introduced in #23932, with introduction of
StorageSnapshotPtr.
Signed-off-by: Azat Khuzhin <a.khuzhin@semrush.com>
The original motivation for this commit was that shared_ptr_helper used
std::shared_ptr<>() which does two heap allocations instead of
make_shared<>() which does a single allocation. Turned out that
1. the affected code (--> Storages/) is not on a hot path (rendering the
performance argument moot ...)
2. yet copying Storage objects is potentially dangerous and was
previously allowed.
Hence, this change
- removes shared_ptr_helper and as a result all inherited create() methods,
- instead, Storage objects are now created using make_shared<>() by the
caller (for that to work, many constructors had to be made public), and
- all Storage classes were marked as noncopyable using boost::noncopyable.
In sum, we are (likely) not making things faster but the code becomes
cleaner and harder to misuse.
1. ASTPartition::formatImpl should output ALL while executing ALTER TABLE t DETACH PARTITION ALL
2. prohibit PARTITION ALL excepte DETACH PARTITION ALL
In #33291 final part commit had been defered, and now it can take
significantly more time, that may lead to "Part directory doesn't exist"
error during INSERT:
2022.02.21 18:18:06.979881 [ 11329 ] {insert} <Debug> executeQuery: (from 127.1:24572, user: default) INSERT INTO db.table (...) VALUES
2022.02.21 20:58:03.933593 [ 11329 ] {insert} <Trace> db.table: Renaming temporary part tmp_insert_20220214_18044_18044_0 to 20220214_270654_270654_0.
2022.02.21 21:16:50.961917 [ 11329 ] {insert} <Trace> db.table: Renaming temporary part tmp_insert_20220214_18197_18197_0 to 20220214_270689_270689_0.
...
2022.02.22 21:16:57.632221 [ 64878 ] {} <Warning> db.table: Removing temporary directory /clickhouse/data/db/table/tmp_insert_20220214_18232_18232_0/
...
2022.02.23 12:23:56.277480 [ 11329 ] {insert} <Trace> db.table: Renaming temporary part tmp_insert_20220214_18232_18232_0 to 20220214_273459_273459_0.
2022.02.23 12:23:56.299218 [ 11329 ] {insert} <Error> executeQuery: Code: 107. DB::Exception: Part directory /clickhouse/data/db/table/tmp_insert_20220214_18232_18232_0/ doesn't exist. Most likely it is a logical error. (FILE_DOESNT_EXIST) (version 22.2.1.1) (from 127.1:24572) (in query: INSERT INTO db.table (...) VALUES), Stack trace (when copying this message, always include the lines below):
Follow-up for: #28760
Refs: #33291
Signed-off-by: Azat Khuzhin <a.khuzhin@semrush.com>
Here is oneliner:
$ gg 'LOG_\(DEBUG\|TRACE\|INFO\|TEST\|WARNING\|ERROR\|FATAL\)([^,]*, [a-zA-Z]' -- :*.cpp :*.h | cut -d: -f1 | sort -u | xargs -r sed -E -i 's#(LOG_[A-Z]*)\(([^,]*), ([A-Za-z][^,)]*)#\1(\2, fmt::runtime(\3)#'
Note, that I tried to do this with coccinelle (tool for semantic
patchin), but it cannot parse C++:
$ cat fmt.cocci
@@
expression log;
expression var;
@@
-LOG_DEBUG(log, var)
+LOG_DEBUG(log, fmt::runtime(var))
I've also tried to use some macros/templates magic to do this implicitly
in logger_useful.h, but I failed to do so, and apparently it is not
possible for now.
Signed-off-by: Azat Khuzhin <a.khuzhin@semrush.com>
v2: manual fixes
Signed-off-by: Azat Khuzhin <a.khuzhin@semrush.com>
- Move some code into module part to avoid dependency from IStorage in SystemLog
- Remove extra headers from SystemLog.h
- Rewrite some code that was relying on headers that was included by SystemLog.h
v2: rebase
v3: squash move into module part with explicit template instantiation
(to make each commit self compilable after rebase)
v2: rebase against MergeTask
v3: rebase due to conflicts in src/Storages/MergeTree/MergeTreeDataMergerMutator.cpp
v4:
- rebase due to conflicts in src/Storages/MergeTree/MergeTask.cpp
- drop common/scope_guard_safe.h (not used)
From time to time 00975_move_partition_merge_tree test got failed, the
reason is that there is merge in progress that writes data to the source
table again:
<details>
2021.10.12 13:20:40.243839 [ 26955 ] {2dbfea50-639e-49ac-9e82-933a00ea04a3} <Debug> executeQuery: (from [::1]:38060) (comment: 00975_move_partition_merge_tree.sql) ALTER TABLE test_move_partition_src MOVE PARTITION 1 TO TABLE test_move_partition_dest;
2021.10.12 13:20:40.244482 [ 26955 ] {2dbfea50-639e-49ac-9e82-933a00ea04a3} <Debug> test_t1tzb2.test_move_partition_dest (cab3b005-d54b-4cdc-8ab3-b005d54becdc): Cloning part /var/lib/clickhouse/store/467/467d7145-b47e-444e-867d-7145b47ea44e/1_2_2_0/ to /var/lib/clickhouse/store/cab/cab3b005-d54b-4cdc-8ab3-b005d54becdc/tmp_move_from_1_21_21_0
...
2021.10.12 13:20:40.373487 [ 378 ] {} <Trace> test_t1tzb2.test_move_partition_src (467d7145-b47e-444e-867d-7145b47ea44e) (MergerMutator): Merged 6 parts: from 1_2_2_0 to 1_11_11_0
...
2021.10.12 13:20:40.379750 [ 26955 ] {2dbfea50-639e-49ac-9e82-933a00ea04a3} <Debug> test_t1tzb2.test_move_partition_dest (cab3b005-d54b-4cdc-8ab3-b005d54becdc): Cloning part /var/lib/clickhouse/store/467/467d7145-b47e-444e-867d-7145b47ea44e/1_15_15_0/ to /var/lib/clickhouse/store/cab/cab3b005-d54b-4cdc-8ab3-b005d54becdc/tmp_move_from_1_28_28_0
</details>
And also remove cleaning of mutations since this will cause deadlock
after doing MOVE PARTITION under
currently_processing_in_background_mutex.
CI: https://clickhouse-test-reports.s3.yandex.net/0/a59c6b1c8eb47ebf77189a491ee0c3980b38e91c/functional_stateless_tests_
Fixes: 00975_move_partition_merge_tree
CI reports failure of the 01442_merge_detach_attach test [1]:
<details>
2021-06-21 02:25:43 01442_merge_detach_attach: [ FAIL ] 122.37 sec. - result differs with reference:
2021-06-21 02:25:43 --- /usr/share/clickhouse-test/queries/0_stateless/01442_merge_detach_attach.reference 2021-06-21 00:43:12.000000000 +0300
2021-06-21 02:25:43 +++ /tmp/clickhouse-test/0_stateless/01442_merge_detach_attach.stdout 2021-06-21 02:25:43.211212197 +0300
2021-06-21 02:25:43 @@ -0,0 +1 @@
2021-06-21 02:25:43 +2
2021.06.21 02:25:08.930896 [ 100543 ] {16eb4fe5-2d6b-4c81-a6be-c6a3b293edd3} <Debug> executeQuery: (from [::1]:36540, using production parser) (comment: '/usr/share/clickhouse-test/queries/0_stateless/01442_merge_detach_attach.sh') ALTER TABLE t DETACH PARTITION tuple()
2021.06.21 02:25:08.931245 [ 100540 ] {bd4b710d-cd27-44ea-9dc9-e45d6ace0bd7} <Debug> executeQuery: (from [::1]:36542, using production parser) (comment: '/usr/share/clickhouse-test/queries/0_stateless/01442_merge_detach_attach.sh') OPTIMIZE TABLE t FINAL
2021.06.21 02:25:08.931826 [ 100543 ] {16eb4fe5-2d6b-4c81-a6be-c6a3b293edd3} <Trace> ContextAccess (default): Access granted: ALTER DELETE ON test_89nl0v.t
2021.06.21 02:25:08.932159 [ 100540 ] {bd4b710d-cd27-44ea-9dc9-e45d6ace0bd7} <Trace> ContextAccess (default): Access granted: OPTIMIZE ON test_89nl0v.t
2021.06.21 02:25:08.932889 [ 100543 ] {16eb4fe5-2d6b-4c81-a6be-c6a3b293edd3} <Information> test_89nl0v.t (efd364af-6721-4249-afd3-64af67214249): Detaching all_143_143_0
2021.06.21 02:25:08.932921 [ 100540 ] {bd4b710d-cd27-44ea-9dc9-e45d6ace0bd7} <Debug> test_89nl0v.t (efd364af-6721-4249-afd3-64af67214249) (MergerMutator): Selected 2 parts from all_143_143_0 to all_144_144_0
2021.06.21 02:25:08.933530 [ 100540 ] {bd4b710d-cd27-44ea-9dc9-e45d6ace0bd7} <Debug> DiskLocal: Reserving 1.00 MiB on disk `default`, having unreserved 4.60 TiB.
2021.06.21 02:25:08.933705 [ 100543 ] {16eb4fe5-2d6b-4c81-a6be-c6a3b293edd3} <Information> test_89nl0v.t (efd364af-6721-4249-afd3-64af67214249): Detaching all_144_144_0
2021.06.21 02:25:08.934215 [ 100540 ] {bd4b710d-cd27-44ea-9dc9-e45d6ace0bd7} <Debug> test_89nl0v.t (efd364af-6721-4249-afd3-64af67214249) (MergerMutator): Merging 2 parts: from all_143_143_0 to all_144_144_0 into Compact
2021.06.21 02:25:08.934280 [ 100543 ] {16eb4fe5-2d6b-4c81-a6be-c6a3b293edd3} <Information> test_89nl0v.t (efd364af-6721-4249-afd3-64af67214249): Detached 2 parts.
2021.06.21 02:25:08.934948 [ 100540 ] {bd4b710d-cd27-44ea-9dc9-e45d6ace0bd7} <Debug> test_89nl0v.t (efd364af-6721-4249-afd3-64af67214249) (MergerMutator): Selected MergeAlgorithm: Horizontal
2021.06.21 02:25:08.936090 [ 100540 ] {bd4b710d-cd27-44ea-9dc9-e45d6ace0bd7} <Debug> MergeTreeSequentialSource: Reading 2 marks from part all_143_143_0, total 1 rows starting from the beginning of the part, column x
2021.06.21 02:25:08.937621 [ 100540 ] {bd4b710d-cd27-44ea-9dc9-e45d6ace0bd7} <Debug> MergeTreeSequentialSource: Reading 2 marks from part all_144_144_0, total 1 rows starting from the beginning of the part, column x
2021.06.21 02:25:08.938124 [ 100543 ] {16eb4fe5-2d6b-4c81-a6be-c6a3b293edd3} <Debug> MemoryTracker: Peak memory usage (for query): 0.00 B.
2021.06.21 02:25:08.939928 [ 100543 ] {} <Debug> TCPHandler: Processed in 0.018537432 sec.
2021.06.21 02:25:08.942140 [ 100543 ] {} <Debug> TCPHandler: Done processing connection.
2021.06.21 02:25:08.948343 [ 100540 ] {bd4b710d-cd27-44ea-9dc9-e45d6ace0bd7} <Debug> test_89nl0v.t (efd364af-6721-4249-afd3-64af67214249) (MergerMutator): Merge sorted 2 rows, containing 1 columns (1 merged, 0 gathered) in 0.014203821 sec., 140.80718139154246 rows/sec., 140.81 B/sec.
2021.06.21 02:25:08.952021 [ 100540 ] {bd4b710d-cd27-44ea-9dc9-e45d6ace0bd7} <Trace> test_89nl0v.t (efd364af-6721-4249-afd3-64af67214249): Renaming temporary part tmp_merge_all_143_144_1 to all_143_144_1.
2021.06.21 02:25:08.952869 [ 100540 ] {bd4b710d-cd27-44ea-9dc9-e45d6ace0bd7} <Warning> test_89nl0v.t (efd364af-6721-4249-afd3-64af67214249) (MergerMutator): Unexpected number of parts removed when adding all_143_144_1: 0 instead of 2
2021.06.21 02:25:08.953264 [ 100540 ] {bd4b710d-cd27-44ea-9dc9-e45d6ace0bd7} <Trace> test_89nl0v.t (efd364af-6721-4249-afd3-64af67214249) (MergerMutator): Merged 2 parts: from all_143_143_0 to all_144_144_0
2021.06.21 02:25:08.953913 [ 100540 ] {bd4b710d-cd27-44ea-9dc9-e45d6ace0bd7} <Debug> MemoryTracker: Peak memory usage: 4.01 MiB.
2021.06.21 02:25:08.958369 [ 100540 ] {bd4b710d-cd27-44ea-9dc9-e45d6ace0bd7} <Debug> MemoryTracker: Peak memory usage (for query): 4.01 MiB.
...
2021.06.21 02:25:09.216075 [ 100543 ] {1699b404-b132-4b96-b04a-1c28cd062a79} <Debug> executeQuery: (from [::1]:36544, using production parser) (comment: '/usr/share/clickhouse-test/queries/0_stateless/01442_merge_detach_attach.sh') SELECT count() FROM t HAVING count() > 0
2021.06.21 02:25:09.229491 [ 100543 ] {1699b404-b132-4b96-b04a-1c28cd062a79} <Trace> ContextAccess (default): Access granted: SELECT(x) ON test_89nl0v.t
2021.06.21 02:25:09.232000 [ 100543 ] {1699b404-b132-4b96-b04a-1c28cd062a79} <Trace> InterpreterSelectQuery: FetchColumns -> Complete
2021.06.21 02:25:09.239907 [ 100543 ] {1699b404-b132-4b96-b04a-1c28cd062a79} <Debug> test_89nl0v.t (efd364af-6721-4249-afd3-64af67214249) (SelectExecutor): Key condition: unknown
2021.06.21 02:25:09.240358 [ 100543 ] {1699b404-b132-4b96-b04a-1c28cd062a79} <Debug> test_89nl0v.t (efd364af-6721-4249-afd3-64af67214249) (SelectExecutor): Selected 1/1 parts by partition key, 1 parts by primary key, 1/1 marks by primary key, 1 marks to read from 1 ranges
2021.06.21 02:25:09.241560 [ 100543 ] {1699b404-b132-4b96-b04a-1c28cd062a79} <Debug> MergeTreeSelectProcessor: Reading 1 ranges from part all_143_144_1, approx. 2 rows starting from 0
2021.06.21 02:25:09.256053 [ 58403 ] {1699b404-b132-4b96-b04a-1c28cd062a79} <Trace> AggregatingTransform: Aggregating
2021.06.21 02:25:09.256410 [ 58403 ] {1699b404-b132-4b96-b04a-1c28cd062a79} <Trace> Aggregator: Aggregation method: without_key
2021.06.21 02:25:09.257576 [ 58403 ] {1699b404-b132-4b96-b04a-1c28cd062a79} <Debug> AggregatingTransform: Aggregated. 2 to 1 rows (from 2.00 B) in 0.013910412 sec. (143.777 rows/sec., 143.78 B/sec.)
2021.06.21 02:25:09.257911 [ 58403 ] {1699b404-b132-4b96-b04a-1c28cd062a79} <Trace> Aggregator: Merging aggregated data
2021.06.21 02:25:09.262595 [ 100543 ] {1699b404-b132-4b96-b04a-1c28cd062a79} <Information> executeQuery: Read 2 rows, 2.00 B in 0.045805192 sec., 43 rows/sec., 43.66 B/sec.
2021.06.21 02:25:09.263337 [ 100543 ] {1699b404-b132-4b96-b04a-1c28cd062a79} <Debug> MemoryTracker: Peak memory usage (for query): 0.00 B.
</details>
[1]: https://clickhouse-test-reports.s3.yandex.net/25513/b96df135aee40b1a54a4fc3f0d4db89e11385564/functional_stateless_tests_(memory).html#fail1
The problem here is that there is a tiny race window between DETACH
and OPTIMIZE.
DETACH cancel merges, and checks that there no merges for parts
currently under lock, and later changes the state of parts. After it
allows merges.
However OPTIMIZE get parts for processing under lock and only when it
starts writing temporary part it checks that merges are not canceled.
So suppose the following scenario:
T#OPTIMIZE T#DETACH
- cancel merges
- lock
- check that no merges are in progress
- unlock
- lock
- get parts
*<--Here, state of the parts are not changed yet,
and lock is not held,
so OPTIMIZE may (and will) get those parts. -->*
- write temporary part
- check merges not canceled
- unlock
- change the parts state
- allows merges
Plus this patch will also fail merges earlier in case of concurrent
DETACH.
Refs: #13746
Refs: #23315
Before this patch KILL MUTATION marks mutation as canceled just by name
(and part numbers) so if you have multiple tables with the same part
name, then killing mutation for one table, will mark it as killed for
another too.
Fix this by comparing StorageID too (it is better to use StorageID over
database/table to avoid ambiguity by using UUIDs for comparing).
Here is a failure of the 01414_freeze_does_not_prevent_alters on CI [1].
[1]: https://clickhouse-test-reports.s3.yandex.net/24069/9fb69dcf98c71a939d200cad3c8491bf43a44622/functional_stateless_tests_(ubsan).html#fail1
TODO (suggested by Nikolai)
1. Build query plan fro current query (inside storage::read) up to WithMergableState
2. Check, that plan is simple enough: Aggregating - Expression - Filter - ReadFromStorage (or simplier)
3. Check, that filter is the same as filter in projection, and also expression calculates the same aggregation keys as in projection
4. Return WithMergableState if projection applies
3 will be easier to do with ActionsDAG, cause it sees all functions, and dependencies are direct (but it is possible with ExpressionActions also)
Also need to figure out how prewhere works for projections, and
row_filter_policies.
wip
In a busy system without enough threads to process mutations at the moment,
you would get a log message per data part with pending mutations, which in
some extreme cases could be dozens per call.
Extended OPTIMIZE ... DEDUPLICATE syntax to allow explicit (or implicit with asterisk/column transformers) list of columns to check for duplicates on.
Following syntax variants are now supported:
OPTIMIZE TABLE table DEDUPLICATE; -- the old one
OPTIMIZE TABLE table DEDUPLICATE BY *;
OPTIMIZE TABLE table DEDUPLICATE BY * EXCEPT colX;
OPTIMIZE TABLE table DEDUPLICATE BY * EXCEPT (colX, colY);
OPTIMIZE TABLE table DEDUPLICATE BY col1,col2,col3;
OPTIMIZE TABLE table DEDUPLICATE BY COLUMNS('column-matched-by-regex');
OPTIMIZE TABLE table DEDUPLICATE BY COLUMNS('column-matched-by-regex') EXCEPT colX;
OPTIMIZE TABLE table DEDUPLICATE BY COLUMNS('column-matched-by-regex') EXCEPT (colX, colY);
Note that * behaves just like in SELECT: MATERIALIZED, and ALIAS columns are not used for expansion.
Also, it is an error to specify empty list of columns, or write an expression that results in an empty list of columns, or deduplicate by an ALIAS column.
Column transformers other than EXCEPT are not supported.
