id stringlengths 36 36 | document stringlengths 3 3k | metadata stringlengths 23 69 | embeddings listlengths 384 384 |
|---|---|---|---|
0c88dbb3-fc03-4ce5-9737-a7b6d1edfa6e | Cloud default value: 1 TB.
:::note
This query setting overwrites its server setting equivalent, see
max_table_size_to_drop
:::
max_temporary_columns {#max_temporary_columns}
The maximum number of temporary columns that must be kept in RAM simultaneously
when running a query, including constant columns. If a q... | {"source_file": "settings.md"} | [
0.033630162477493286,
0.02332143485546112,
-0.08778616040945053,
0.0514385811984539,
-0.02300923690199852,
-0.05272206664085388,
0.02514422871172428,
0.062045868486166,
0.048293501138687134,
0.09409398585557938,
0.023786693811416626,
0.01570935547351837,
0.06083831936120987,
-0.04088170826... |
dc72fc2a-74e0-4a81-acc7-eac16cca1fef | memory_overcommit_ratio_denominator {#memory_overcommit_ratio_denominator}
It represents the soft memory limit when the hard limit is reached on the global level.
This value is used to compute the overcommit ratio for the query.
Zero means skip the query.
Read more about
memory overcommit
.
memory_overcommit_r... | {"source_file": "settings.md"} | [
0.04195692390203476,
0.006217362359166145,
-0.13404029607772827,
0.05724717304110527,
-0.010259602218866348,
-0.07088842242956161,
0.10225272923707962,
0.07784006744623184,
-0.03460092842578888,
-0.00016340252477675676,
0.04161227121949196,
-0.0336243137717247,
0.040099482983350754,
-0.043... |
a972458a-da31-435f-b064-cbe572b84f90 | merge_table_max_tables_to_look_for_schema_inference {#merge_table_max_tables_to_look_for_schema_inference}
When creating a
Merge
table without an explicit schema or when using the
merge
table function, infer schema as a union of not more than the specified number of matching tables.
If there is a larger numbe... | {"source_file": "settings.md"} | [
0.06877894699573517,
-0.05757934972643852,
0.021457085385918617,
-0.024489207193255424,
0.015439964830875397,
-0.08834131807088852,
0.005607354920357466,
0.013608112931251526,
-0.06365421414375305,
0.022354712709784508,
0.01781211420893669,
-0.07056892663240433,
0.0316920168697834,
-0.0496... |
abc4eedf-1cf2-4fe3-bf81-b3a844bc5ee3 | Possible value:
Positive integer.
merge_tree_min_bytes_for_concurrent_read_for_remote_filesystem {#merge_tree_min_bytes_for_concurrent_read_for_remote_filesystem}
The minimum number of bytes to read from one file before
MergeTree
engine can parallelize reading, when reading from remote filesystem. We do... | {"source_file": "settings.md"} | [
-0.016372470185160637,
-0.028632760047912598,
-0.046210113912820816,
0.0012222070945426822,
-0.03784831613302231,
-0.09008875489234924,
-0.005563333164900541,
0.09132533520460129,
-0.01595436781644821,
0.04625383019447327,
0.00957051943987608,
0.023078816011548042,
-0.005280972924083471,
-... |
cbf1afc2-8e49-4803-8ef1-a03835857a70 | Possible values:
- 0 - No delay (default)
- N - Delay in milliseconds
merge_tree_use_const_size_tasks_for_remote_reading {#merge_tree_use_const_size_tasks_for_remote_reading}
Whether to use constant size tasks for reading from a remote table.
merge_tree_use_deserialization_prefixes_cache {#merge_tree_use_deseri... | {"source_file": "settings.md"} | [
0.028936849907040596,
-0.03410206362605095,
-0.062393855303525925,
-0.003207392757758498,
-0.0443178191781044,
-0.11068043112754822,
-0.07581863552331924,
0.06841190159320831,
-0.013190999627113342,
0.055282529443502426,
0.06169293820858002,
0.009081831201910973,
-0.055476587265729904,
-0.... |
23eb7e38-e9d6-4e47-9f11-4e01e4c9d7e6 | The actual size of the block, if the uncompressed data is less than
max_compress_block_size
, is no less than this value and no less than the volume of data for one mark.
Let's look at an example. Assume that
index_granularity
was set to 8192 during table creation.
We are writing a UInt32-type column (4 bytes pe... | {"source_file": "settings.md"} | [
-0.047552235424518585,
0.022106220945715904,
-0.035494208335876465,
0.059041447937488556,
-0.021788137033581734,
-0.08332186937332153,
-0.050835881382226944,
0.048857901245355606,
0.02563359960913658,
0.024426547810435295,
-0.06371228396892548,
0.008834881708025932,
0.023974770680069923,
-... |
31edaaa5-0625-4e52-88c1-681bb56d3ce9 | min_free_disk_space_for_temporary_data {#min_free_disk_space_for_temporary_data}
The minimum disk space to keep while writing temporary data used in external sorting and aggregation.
min_hit_rate_to_use_consecutive_keys_optimization {#min_hit_rate_to_use_consecutive_keys_optimization}
Minimal hit rate of a ca... | {"source_file": "settings.md"} | [
-0.0279704537242651,
0.028962938115000725,
-0.055400919169187546,
0.06896045804023743,
-0.019894300028681755,
-0.04315244033932686,
-0.045500852167606354,
0.05619296804070473,
0.06351101398468018,
0.060742899775505066,
0.06043769791722298,
0.0257437564432621,
0.06761501729488373,
-0.080239... |
40cafe96-f217-41fe-baa8-4d4c544aa90b | min_outstreams_per_resize_after_split {#min_outstreams_per_resize_after_split}
Specifies the minimum number of output streams of a
Resize
or
StrictResize
processor after the split is performed during pipeline generation. If the resulting number of streams is less than this value, the split operation will not ... | {"source_file": "settings.md"} | [
-0.017645925283432007,
0.0019084071973338723,
0.0336981900036335,
0.031984198838472366,
0.05149573087692261,
-0.028653854504227638,
-0.06412962824106216,
0.07255339622497559,
0.0037612984888255596,
0.014883691444993019,
-0.07112453132867813,
0.02088392712175846,
-0.013987374491989613,
-0.0... |
5395b89d-0b2d-47ba-a149-071600ee53aa | min_table_rows_to_use_projection_index {#min_table_rows_to_use_projection_index}
If the estimated number of rows to read from the table is greater than or equal to this threshold, ClickHouse will try to use the projection index during query execution.
mongodb_throw_on_unsupported_query {#mongodb_throw_on_unsupp... | {"source_file": "settings.md"} | [
0.06136244162917137,
0.02207251265645027,
-0.03042960911989212,
0.06233122572302818,
0.029530787840485573,
-0.059108536690473557,
-0.04807700589299202,
-0.024117667227983475,
-0.056420329958200455,
0.07348766177892685,
-0.00882450770586729,
-0.05709417909383774,
0.023809298872947693,
-0.02... |
4e91fd94-c6f0-49b8-bf7a-f8eb6e5d35ed | Allows to execute
ALTER TABLE ... UPDATE|DELETE|MATERIALIZE INDEX|MATERIALIZE PROJECTION|MATERIALIZE COLUMN|MATERIALIZE STATISTICS
queries (
mutations
) synchronously.
Possible values:
| Value | Description ... | {"source_file": "settings.md"} | [
-0.0705060213804245,
-0.009475677274167538,
-0.0745328739285469,
0.07566048949956894,
0.01767130382359028,
-0.08368617296218872,
-0.028093766421079636,
-0.05060499906539917,
0.028899813070893288,
0.08711343258619308,
0.052369050681591034,
-0.019050903618335724,
0.09306035935878754,
-0.1133... |
d02b80a0-efc0-4b77-981a-2f9c0e6841f5 | LZ4HC
— use the LZ4HC codec.
ZSTD
— use the ZSTD codec.
See Also
network_zstd_compression_level
network_zstd_compression_level {#network_zstd_compression_level}
Adjusts the level of ZSTD compression. Used only when
network_compression_method
is set to
ZSTD
.
Possible values:
Positive intege... | {"source_file": "settings.md"} | [
-0.014243800193071365,
0.061669476330280304,
-0.04995104297995567,
0.0044952621683478355,
0.023531250655651093,
-0.0946001186966896,
-0.0585942342877388,
0.05181732401251793,
-0.041449446231126785,
-0.04059923440217972,
0.006311078555881977,
0.0012948104413226247,
0.036870382726192474,
-0.... |
90950f4f-3597-4b60-9e15-bff999612b61 | 1 —
GROUP BY
optimization is enabled.
See Also
GROUP BY optimization
optimize_aggregators_of_group_by_keys {#optimize_aggregators_of_group_by_keys}
Eliminates min/max/any/anyLast aggregators of GROUP BY keys in SELECT sectio
optimize_and_compare_chain {#optimize_and_compare_chain}
Populate con... | {"source_file": "settings.md"} | [
-0.0067185875959694386,
0.022921783849596977,
0.00840693712234497,
-0.006324574816972017,
-0.03760295361280441,
0.005182240158319473,
-0.0225797351449728,
-0.03285999968647957,
-0.04479221999645233,
0.008130688220262527,
0.002252691425383091,
0.005684718955308199,
0.046205151826143265,
-0.... |
28a7e700-50a5-4833-a9ac-053f906ca274 | Possible values:
0 — Disabled.
1 — Enabled.
See also:
distributed_group_by_no_merge
distributed_push_down_limit
optimize_skip_unused_shards
:::note
Right now it requires
optimize_skip_unused_shards
(the reason behind this is that one day it may be enabled by default, and it will work correctly o... | {"source_file": "settings.md"} | [
0.06774494796991348,
0.05441635847091675,
0.013566813431680202,
0.03973062336444855,
-0.0221322663128376,
-0.018151724711060524,
-0.07961160689592361,
-0.00712589779868722,
-0.03755151480436325,
0.013240134343504906,
0.05904258042573929,
-0.018562830984592438,
0.060361556708812714,
-0.0575... |
c95fb9a7-b2c2-48e1-b83d-4478a09b7a2b | optimize_min_equality_disjunction_chain_length {#optimize_min_equality_disjunction_chain_length}
The minimum length of the expression
expr = x1 OR ... expr = xN
for optimizatio
optimize_min_inequality_conjunction_chain_length {#optimize_min_inequality_conjunction_chain_length}
The minimum length of the expr... | {"source_file": "settings.md"} | [
0.03131290152668953,
-0.006848951801657677,
0.041887570172548294,
0.0033723495434969664,
-0.006902296096086502,
-0.03450688719749451,
-0.01481614913791418,
0.045682936906814575,
-0.031087981536984444,
0.019195888191461563,
0.06186702474951744,
-0.014252033084630966,
0.006292985752224922,
-... |
c3d579b6-f579-496c-abda-4a3392dd22cd | optimize_read_in_order {#optimize_read_in_order}
Enables
ORDER BY
optimization in
SELECT
queries for reading data from
MergeTree
tables.
Possible values:
0 —
ORDER BY
optimization is disabled.
1 —
ORDER BY
optimization is enabled.
See Also
ORDER BY Clause
optimize_read_in_window_order ... | {"source_file": "settings.md"} | [
0.05685104429721832,
0.022170299664139748,
0.048934340476989746,
0.030153201892971992,
-0.05134396627545357,
-0.05175146088004112,
-0.007874276489019394,
0.07503525912761688,
-0.005809620954096317,
0.03505060821771622,
-0.0042417640797793865,
0.11080864816904068,
-0.009582843631505966,
-0.... |
e8de295c-7259-4765-aadb-cb5b96881de7 | Possible values:
0 — Disabled.
1 — Enabled.
optimize_skip_unused_shards_limit {#optimize_skip_unused_shards_limit}
Limit for number of sharding key values, turns off
optimize_skip_unused_shards
if the limit is reached.
Too many values may require significant amount for processing, while the benefit is... | {"source_file": "settings.md"} | [
0.0634954571723938,
0.03523138165473938,
-0.00211547315120697,
0.08928178250789642,
0.012577119283378124,
-0.042465005069971085,
-0.04042169451713562,
-0.017195146530866623,
0.02002965845167637,
-0.005329308100044727,
0.039026349782943726,
0.003570769215002656,
0.04516370967030525,
-0.0554... |
0b9aee05-2f73-43ed-82a7-f5f3cacc8926 | 0 — Throwing an exception is disabled.
optimize_time_filter_with_preimage {#optimize_time_filter_with_preimage}
col >= '2023-01-01' AND col <= '2023-12-31')"}]}]}/>
Optimize Date and DateTime predicates by converting functions into equivalent comparisons without conversions (e.g.
toYear(col) = 2023 -> col >... | {"source_file": "settings.md"} | [
0.04615144059062004,
0.033620450645685196,
-0.06366685777902603,
0.07933741062879562,
-0.039993103593587875,
-0.03188515827059746,
-0.05205826461315155,
0.0897078737616539,
-0.020839232951402664,
0.027690090239048004,
0.010902704671025276,
-0.09310167282819748,
0.04804915934801102,
-0.0402... |
5f56f716-4e4c-447b-b8fe-38de8d67d03e | Possible values: from
1
to
22
output_format_compression_zstd_window_log {#output_format_compression_zstd_window_log}
Can be used when the output compression method is
zstd
. If greater than
0
, this setting explicitly sets compression window size (power of
2
) and enables a long-range mode for zstd compre... | {"source_file": "settings.md"} | [
-0.0631854459643364,
0.11371946334838867,
-0.11353708058595657,
0.012725874781608582,
0.026548413559794426,
-0.04778464138507843,
-0.06914936006069183,
0.05558954179286957,
-0.01789090968668461,
0.025713901966810226,
-0.06360146403312683,
0.040338966995477676,
0.034394752234220505,
0.01653... |
3a9846aa-a989-4937-8c6f-a04cf7ab1cb7 | parallel_replica_offset {#parallel_replica_offset}
This is internal setting that should not be used directly and represents an implementation detail of the 'parallel replicas' mode. This setting will be automatically set up by the initiator server for distributed queries to the index of the replica participating ... | {"source_file": "settings.md"} | [
-0.03773435577750206,
0.00033792437170632184,
-0.04297107085585594,
0.05030396953225136,
-0.09602773934602737,
-0.046825822442770004,
-0.06550249457359314,
0.027991723269224167,
0.03204993158578873,
0.02189287170767784,
0.02722502313554287,
-0.01348157785832882,
0.10293269157409668,
-0.078... |
8c7f8955-dbb8-4970-b091-c8adbe3edf1a | Note: This setting will not cause any additional data to be filtered during query processing, rather it changes the points at which the range filter breaks up the range
[0, INT_MAX]
for parallel processing
parallel_replicas_for_cluster_engines {#parallel_replicas_for_cluster_engines}
Replace table function en... | {"source_file": "settings.md"} | [
-0.00767616368830204,
-0.025315459817647934,
-0.029020078480243683,
0.0032210664357990026,
-0.020195240154862404,
-0.052029140293598175,
-0.08107514679431915,
-0.03615092858672142,
-0.05717429891228676,
0.0062690055929124355,
0.0032544799614697695,
-0.056285127997398376,
0.024524934589862823... |
85e1369c-666b-4460-94f7-d3236d492968 | parallel_view_processing {#parallel_view_processing}
Enables pushing to attached views concurrently instead of sequentially.
parallelize_output_from_storages {#parallelize_output_from_storages}
Parallelize output for reading step from storage. It allows parallelization of query processing right after readin... | {"source_file": "settings.md"} | [
-0.01611923798918724,
-0.030198724940419197,
-0.017816441133618355,
-0.010538510978221893,
-0.07112882286310196,
-0.04290376231074333,
-0.04081745818257332,
0.050417911261320114,
-0.0867961123585701,
-0.014260856434702873,
0.031811825931072235,
-0.060333020985126495,
0.014314885251224041,
... |
2cff2651-8d70-4c62-b244-604be8e31255 | postgresql_connection_pool_size {#postgresql_connection_pool_size}
Connection pool size for PostgreSQL table engine and database engine.
postgresql_connection_pool_wait_timeout {#postgresql_connection_pool_wait_timeout}
Connection pool push/pop timeout on empty pool for PostgreSQL table engine and database en... | {"source_file": "settings.md"} | [
-0.029466181993484497,
-0.035415902733802795,
-0.0388287715613842,
0.03025672398507595,
-0.1182413250207901,
-0.06447449326515198,
0.03846418112516403,
0.007852254435420036,
0.0549551323056221,
-0.0060324822552502155,
0.006716608069837093,
-0.024812180548906326,
0.024188179522752762,
-0.07... |
685c9c37-a340-4dbd-91d1-d3f5e0f5b0a8 | See also:
Distributed subqueries
for more information on how to use
GLOBAL IN
/
GLOBAL JOIN
prefer_localhost_replica {#prefer_localhost_replica}
Enables/disables preferable using the localhost replica when processing distributed queries.
Possible values:
1 — ClickHouse always sends a query to the lo... | {"source_file": "settings.md"} | [
-0.047369491308927536,
0.004334269091486931,
0.0472433865070343,
0.020075609907507896,
-0.016903502866625786,
-0.07691911607980728,
-0.03436482697725296,
-0.0678296759724617,
0.0612485446035862,
0.012485288083553314,
0.003812985960394144,
-0.01826786808669567,
0.08186706155538559,
-0.06768... |
8cf16d2e-dbd2-4bcb-8f9d-5ba66e199a92 | a Tuple(
b String,
c Tuple(
d Nullable(UInt64),
e Array(UInt32),
f Array(Tuple(
g String,
h Map(
String,
Array(Tuple(
i String,
j UInt64
))
)
)),
... | {"source_file": "settings.md"} | [
0.015066133812069893,
0.041142214089632034,
-0.1279432773590088,
0.02566656656563282,
-0.10865160822868347,
0.0015987138031050563,
0.0308381337672472,
0.04910898208618164,
-0.09571193158626556,
0.01382408943027258,
0.019488684833049774,
-0.04404459893703461,
0.03222545236349106,
-0.0328251... |
be9d2362-9979-4789-bf2e-dd8db6e7bccb | Possible values:
0 - Disabled
1 - Enabled
query_cache_squash_partial_results {#query_cache_squash_partial_results}
Squash partial result blocks to blocks of size
max_block_size
. Reduces performance of inserts into the
query cache
but improves the compressability of cache entries (see
query_cache_comp... | {"source_file": "settings.md"} | [
0.042475875467061996,
0.050381988286972046,
-0.06220144405961037,
0.06858592480421066,
-0.032224345952272415,
-0.06539321690797806,
0.037624940276145935,
0.006018237676471472,
-0.022376103326678276,
-0.031036686152219772,
0.008401913568377495,
0.034153927117586136,
0.026484467089176178,
-0... |
e01d8130-f0bb-447b-9127-53802f5dab8f | Allow to convert
JOIN
to subquery with
IN
if output columns tied to only left table. May cause wrong results with non-ANY JOINs (e.g. ALL JOINs which is the default).
query_plan_convert_outer_join_to_inner_join {#query_plan_convert_outer_join_to_inner_join}
Allow to convert
OUTER JOIN
to
INNER JOIN
if f... | {"source_file": "settings.md"} | [
0.00018232139700558037,
0.053952183574438095,
0.02376445382833481,
0.06798076629638672,
-0.000528395117726177,
-0.02319435216486454,
-0.05002303421497345,
0.040508151054382324,
-0.05155361443758011,
-0.06387490034103394,
-0.038273897022008896,
-0.07231760025024414,
0.01725611835718155,
-0.... |
124fddc9-52cb-42ce-aa5d-7a02320c1803 | query_plan_join_swap_table {#query_plan_join_swap_table}
Determine which side of the join should be the build table (also called inner, the one inserted into the hash table for a hash join) in the query plan. This setting is supported only for `ALL` join strictness with the `JOIN ON` clause. Possible values are:
... | {"source_file": "settings.md"} | [
-0.030230063945055008,
0.06009306758642197,
-0.009732158854603767,
0.04403684288263321,
-0.06961753219366074,
-0.030697889626026154,
-0.028903357684612274,
-0.014801330864429474,
-0.08819329738616943,
0.015280086547136307,
-0.052800435572862625,
0.055924106389284134,
0.03661387786269188,
-... |
44fe7de5-dd9e-41b5-a2ac-652fc5c657bd | Possible values:
0 - Disable
1 - Enable
query_plan_merge_filter_into_join_condition {#query_plan_merge_filter_into_join_condition}
Allow to merge filter into
JOIN
condition and convert
CROSS JOIN
to
INNER
.
query_plan_merge_filters {#query_plan_merge_filters}
Allow to merge filters in the q... | {"source_file": "settings.md"} | [
0.022061312571167946,
0.0512356199324131,
-0.013954704627394676,
0.047053709626197815,
-0.026686979457736015,
-0.010026227682828903,
-0.03621166944503784,
0.03473087400197983,
-0.12020939588546753,
-0.014056959189474583,
-0.05537441745400429,
-0.004798376467078924,
0.04730436950922012,
0.0... |
7f358af8-9c44-4279-ae4f-7cffdc288be7 | Toggles a query-plan-level optimization which uses storage sorting when sorting for window functions.
Only takes effect if setting
query_plan_enable_optimizations
is 1.
:::note
This is an expert-level setting which should only be used for debugging by developers. The setting may change in future in backward-incompa... | {"source_file": "settings.md"} | [
-0.03454289585351944,
0.05314011499285698,
-0.011320948600769043,
0.10658732056617737,
0.005904345773160458,
-0.005582556594163179,
0.0021612150594592094,
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0.021862702444195747,
-0.062014829367399216,
0.050387803465127945,
-0.03883885219693184,
... |
8e548e45-8ac1-4bc6-8f06-33c57adcc10b | rabbitmq_max_wait_ms {#rabbitmq_max_wait_ms}
The wait time for reading from RabbitMQ before retry.
read_backoff_max_throughput {#read_backoff_max_throughput}
Settings to reduce the number of threads in case of slow reads. Count events when the read bandwidth is less than that many bytes per second.
read_bac... | {"source_file": "settings.md"} | [
0.10555880516767502,
-0.03234062343835831,
-0.016162363812327385,
0.09296651184558868,
-0.08834075182676315,
-0.02459951862692833,
0.02297716587781906,
0.03881495073437691,
0.009591092355549335,
0.0441930815577507,
-0.033310990780591965,
0.055819038301706314,
0.0012627679388970137,
-0.0190... |
3762afd8-88de-4526-bb7a-203e6b1ffc58 | What to do when the limit is exceeded.
read_overflow_mode_leaf {#read_overflow_mode_leaf}
Sets what happens when the volume of data read exceeds one of the leaf limits.
Possible options:
-
throw
: throw an exception (default).
-
break
: stop executing the query and return the partial result.
read_priority {... | {"source_file": "settings.md"} | [
0.009255007840692997,
0.01246821228414774,
-0.022471757605671883,
0.023860735818743706,
0.01663440465927124,
-0.11564820259809494,
-0.05123960226774216,
0.022838521748781204,
-0.032741252332925797,
0.09517856687307358,
0.021958036348223686,
0.07884152233600616,
-0.005028733052313328,
-0.07... |
d1a0e778-eed4-4e76-8607-d1f801586613 | rename_files_after_processing {#rename_files_after_processing}
Type:
String
Default value:
Empty string
This setting allows to specify renaming pattern for files processed by
file
table function. When option is set, all files read by
file
table function will be renamed according to specified pat... | {"source_file": "settings.md"} | [
-0.013402117416262627,
0.04499323293566704,
-0.03391792252659798,
0.044772278517484665,
-0.039559461176395416,
-0.054876748472452164,
0.031934954226017,
0.07823224365711212,
0.06816412508487701,
0.07314513623714447,
0.000634985975921154,
0.013406874611973763,
0.0011938350507989526,
-0.0453... |
68a5e783-1b2e-4dc9-b269-fe17aa1eb93f | For testing purposes. Replaces all external table functions to Null to not initiate external connections.
restore_replicated_merge_tree_to_shared_merge_tree {#restore_replicated_merge_tree_to_shared_merge_tree}
Replace table engine from Replicated
MergeTree -> Shared
MergeTree during RESTORE.
result_overflow_... | {"source_file": "settings.md"} | [
-0.04036155343055725,
-0.05531134456396103,
0.04248800128698349,
0.008337371982634068,
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-0.04739394783973694,
0.07339593023061752,
-0.0027269860729575157,
-0.02449021302163601,
0.026310689747333527,
-0... |
eb6a8ebe-c6f1-4068-81a7-200b2aefb9e8 | See more details
here
.
s3_disable_checksum {#s3_disable_checksum}
Do not calculate a checksum when sending a file to S3. This speeds up writes by avoiding excessive processing passes on a file. It is mostly safe as the data of MergeTree tables is checksummed by ClickHouse anyway, and when S3 is accessed with HT... | {"source_file": "settings.md"} | [
-0.019225453957915306,
-0.016857609152793884,
-0.08820173889398575,
-0.0004748742503579706,
0.03092324361205101,
-0.07730532437562943,
0.00999575573951006,
0.0060651530511677265,
0.03990048170089722,
0.06573766469955444,
0.0044224318116903305,
0.027235062792897224,
0.07058664411306381,
-0.... |
f3f38539-0906-43df-9a5c-c9570f9b43a8 | s3_skip_empty_files {#s3_skip_empty_files}
Enables or disables skipping empty files in
S3
engine tables.
Possible values:
- 0 —
SELECT
throws an exception if empty file is not compatible with requested format.
- 1 —
SELECT
returns empty result for empty file.
s3_slow_all_threads_after_network_error {#s3... | {"source_file": "settings.md"} | [
-0.051680684089660645,
-0.01208463590592146,
-0.009802790358662605,
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0.05455926060676575,
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0.02972501702606678,
0.033377353101968765,
-0.... |
19ac66a6-c25a-40e5-945f-184237396ffb | s3queue_migrate_old_metadata_to_buckets {#s3queue_migrate_old_metadata_to_buckets}
Migrate old metadata structure of S3Queue table to a new one
schema_inference_cache_require_modification_time_for_url {#schema_inference_cache_require_modification_time_for_url}
Use schema from cache for URL with last modific... | {"source_file": "settings.md"} | [
0.005087818950414658,
-0.030848205089569092,
-0.03290107846260071,
-0.03296570107340813,
0.05600874125957489,
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-0.024517444893717766,
-0.07768949866294861,
0.03207632154226303,
0.10725540667772293,
0.028494346886873245,
-0.056257132440805435,
0.045831192284822464,
-0.0... |
4f34f06a-901f-421d-9a00-5e72ff67a320 | Send server text logs with specified regexp to match log source name. Empty means all sources.
send_progress_in_http_headers {#send_progress_in_http_headers}
Enables or disables
X-ClickHouse-Progress
HTTP response headers in
clickhouse-server
responses.
For more information, read the
HTTP interface descrip... | {"source_file": "settings.md"} | [
-0.004780752118676901,
0.07587812840938568,
-0.033860284835100174,
0.015301812440156937,
-0.045333582907915115,
-0.06698640435934067,
-0.032224807888269424,
-0.02156565524637699,
-0.011539856903254986,
-0.005822570063173771,
-0.030158227309584618,
0.020379913970828056,
-0.002221854403614998,... |
7d6db7eb-dfa4-4417-91a3-d4f8522e25e0 | This happens due to different parsing pipelines:
toDateTime()
without explicitly given time zone used in the first
SELECT
query honors setting
session_timezone
and the global time zone.
In the second query, a DateTime is parsed from a String, and inherits the type and time zone of the existing column
d
. Thu... | {"source_file": "settings.md"} | [
0.00960480235517025,
0.010057133622467518,
0.09645745903253555,
0.008527821861207485,
0.05755478888750076,
-0.07038428634405136,
-0.05092810094356537,
0.012589829973876476,
0.061939537525177,
0.06086345389485359,
-0.0034712457563728094,
-0.08020353317260742,
-0.04611605778336525,
-0.062790... |
f3dd0bc1-a14f-4dc0-a0c9-0b204fbc3e42 | Possible values:
0 — The query will be displayed without table UUID.
1 — The query will be displayed with table UUID.
single_join_prefer_left_table {#single_join_prefer_left_table}
For single JOIN in case of identifier ambiguity prefer left table
skip_redundant_aliases_in_udf {#skip_redundant_aliases_in... | {"source_file": "settings.md"} | [
0.00725200679153204,
-0.04282654449343681,
-0.006658811122179031,
0.05471787601709366,
-0.002293476602062583,
-0.03861938789486885,
0.03718828037381172,
0.04091315716505051,
-0.024392444640398026,
-0.039097972214221954,
0.06913112848997116,
-0.019855830818414688,
0.02771696075797081,
-0.05... |
95fd2dae-7b01-44e8-a740-d73e1fb563c4 | split_intersecting_parts_ranges_into_layers_final {#split_intersecting_parts_ranges_into_layers_final}
Split intersecting parts ranges into layers during FINAL optimizatio
split_parts_ranges_into_intersecting_and_non_intersecting_final {#split_parts_ranges_into_intersecting_and_non_intersecting_final}
Spl... | {"source_file": "settings.md"} | [
-0.01616431400179863,
0.03946588188409805,
0.0634806752204895,
-0.02670620009303093,
0.03105594776570797,
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0.05927623435854912,
-0.09593547880649567,
-0.08907196670770645,
-0.04334862902760506,
0.02043498121201992,
-0.05184342339634895,
-0.05721... |
83aa0fda-58d7-4733-b723-0d89c9b8ad26 | Timeout for polling data from/to streaming storages.
system_events_show_zero_values {#system_events_show_zero_values}
Allows to select zero-valued events from
system.events
.
Some monitoring systems require passing all the metrics values to them for each checkpoint, even if the metric value is zero.
Possible... | {"source_file": "settings.md"} | [
0.07033467292785645,
-0.0014568555634468794,
-0.10297267884016037,
0.06114034727215767,
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0.0431685633957386,
-0.02305481769144535,
0.05971701443195343,
0.09469951689243317,
-0.022304555401206017,
0.005312436725944281,
0.048815492540597916,
-0.044... |
3d142f87-9825-4bac-b601-e25601854e5f | Allows or forbids empty INSERTs, enabled by default (throws an error on an empty insert). Only applies to INSERTs using
clickhouse-client
or using the
gRPC interface
.
throw_on_error_from_cache_on_write_operations {#throw_on_error_from_cache_on_write_operations}
Ignore error from cache when caching on write op... | {"source_file": "settings.md"} | [
-0.032693952322006226,
-0.044160693883895874,
-0.03824663534760475,
0.019066324457526207,
-0.02782323583960533,
-0.06930459290742874,
-0.018389876931905746,
0.06554281711578369,
0.030494950711727142,
-0.0027190728578716516,
0.036016061902046204,
0.03504653647542,
0.04200940951704979,
-0.02... |
511d258b-13e7-4ec1-b86f-466078a601dd | transform_null_in {#transform_null_in}
Enables equality of
NULL
values for
IN
operator.
By default,
NULL
values can't be compared because
NULL
means undefined value. Thus, comparison
expr = NULL
must always return
false
. With this setting
NULL = NULL
returns
true
for
IN
operator.
Possible valu... | {"source_file": "settings.md"} | [
-0.015072819776833057,
0.04003795236349106,
0.00025998373166657984,
0.05170561745762825,
-0.02581866644322872,
-0.07729757577180862,
0.001551891677081585,
0.017435314133763313,
-0.024477433413267136,
0.041672274470329285,
0.05262034758925438,
-0.006357766687870026,
0.06406895816326141,
-0.... |
932c70c7-2df3-4690-9d22-ed65c2ea790b | Enabled by default.
use_client_time_zone {#use_client_time_zone}
Use client timezone for interpreting DateTime string values, instead of adopting server timezone.
use_compact_format_in_distributed_parts_names {#use_compact_format_in_distributed_parts_names}
Uses compact format for storing blocks for backg... | {"source_file": "settings.md"} | [
0.017336782068014145,
-0.025222817435860634,
-0.059563711285591125,
0.008383732289075851,
-0.02174711972475052,
-0.004912966396659613,
-0.10775627940893173,
0.007901477627456188,
-0.004795443266630173,
0.02077425830066204,
0.010569657199084759,
-0.019254881888628006,
0.051189444959163666,
... |
0dfdfcf0-1589-4018-a27d-2d0f3f034c5f | Try using an index if there is a subquery or a table expression on the right side of the IN operator.
use_index_for_in_with_subqueries_max_values {#use_index_for_in_with_subqueries_max_values}
The maximum size of the set in the right-hand side of the IN operator to use table index for filtering. It allows to avoi... | {"source_file": "settings.md"} | [
-0.030528776347637177,
0.058883536607027054,
0.04456257447600365,
0.004093949217349291,
-0.047829825431108475,
-0.06603017449378967,
-0.016017697751522064,
0.07607108354568481,
-0.044385433197021484,
-0.02968274988234043,
-0.014140118844807148,
0.048981379717588425,
0.011770655401051044,
0... |
e9dee979-9928-455a-a44f-deb1d8303e17 | 0 — Disabled.
1 — Enabled.
use_skip_indexes_if_final {#use_skip_indexes_if_final}
Controls whether skipping indexes are used when executing a query with the FINAL modifier.
Skip indexes may exclude rows (granules) containing the latest data, which could lead to incorrect results from a query with the FINA... | {"source_file": "settings.md"} | [
-0.009914198890328407,
0.02839042618870735,
0.05026309937238693,
0.05505595728754997,
0.06136304885149002,
-0.048490531742572784,
0.0037336412351578474,
-0.037194348871707916,
-0.02436460368335247,
-0.030837494879961014,
0.07773588597774506,
0.02403631992638111,
0.018661189824342728,
-0.09... |
11dee40e-9fbe-40dc-9d53-f2aec664032a | use_uncompressed_cache {#use_uncompressed_cache}
Whether to use a cache of uncompressed blocks. Accepts 0 or 1. By default, 0 (disabled).
Using the uncompressed cache (only for tables in the MergeTree family) can significantly reduce latency and increase throughput when working with a large number of short queries.... | {"source_file": "settings.md"} | [
0.04875446483492851,
-0.0035264769103378057,
-0.01810910739004612,
0.04523777961730957,
-0.024270007386803627,
-0.07776995748281479,
-0.04271942377090454,
0.028699735179543495,
0.0003689474833663553,
0.01896297000348568,
-0.006097925826907158,
0.06784231215715408,
-0.027627620846033096,
-0... |
669c7a26-b3a0-4070-aee2-d57eeeaeeae2 | ```text
┌─map_of_variants_type────────────────────────────────┐
│ Map(String, Variant(Array(UInt64), String, UInt64)) │
└─────────────────────────────────────────────────────┘
┌─map_of_variants───────────────┐
│ {'a':[],'b':0,'c':'str_0'} │
│ {'a':[0],'b':1,'c':'str_1'} │
│ {'a':[0,1],'b':2,'c':'str_2'} │
└─────... | {"source_file": "settings.md"} | [
0.042455367743968964,
0.030981143936514854,
-0.00759930070489645,
-0.048365507274866104,
-0.08080333471298218,
-0.020877141505479813,
-0.03878090903162956,
0.032544467598199844,
-0.11916904151439667,
0.044588252902030945,
0.06826084107160568,
0.026200218126177788,
0.042158566415309906,
-0.... |
1c5b5ddd-176e-45bc-b0ff-75f161bbcaac | wait_changes_become_visible_after_commit_mode {#wait_changes_become_visible_after_commit_mode}
Wait for committed changes to become actually visible in the latest snapshot
wait_for_async_insert {#wait_for_async_insert}
If true wait for processing of asynchronous insertio
wait_for_async_insert_timeout {#wa... | {"source_file": "settings.md"} | [
-0.0415724441409111,
0.01878705620765686,
-0.07201465964317322,
0.07984959334135056,
0.05303177610039711,
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-0.0017364308005198836,
-0.02963983826339245,
0.05834229663014412,
0.006899679079651833,
0.028093421831727028,
-0.04094799607992172,
-0.030513780191540718,
-0.10... |
4d07e1e2-9faf-4bfc-9b48-9694187acc78 | description: 'Overview page for settings.'
sidebar_position: 1
slug: /operations/settings/overview
title: 'Settings Overview'
doc_type: 'reference'
Settings Overview
Overview {#overview}
:::note
XML-based Settings Profiles and
configuration files
are currently not
supported for ClickHouse Cloud. To specify s... | {"source_file": "overview.md"} | [
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0.029659267514944077,
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0.005894956178963184,
0.03185013309121132,
-0.04707096144556999,
-0.060591164976358414,
0.01895531825721264,
0.035240720957517624,
-0.0245085209608078,
0.042676981538534164,
-0.080... |
c1f7159f-5601-4682-a52a-d17f1dffd27a | description: 'Settings for configuring users and roles.'
sidebar_label: 'User Settings'
sidebar_position: 63
slug: /operations/settings/settings-users
title: 'Users and roles settings'
doc_type: 'reference'
Users and roles settings
The
users
section of the
users.xml
configuration file contains user settings.
... | {"source_file": "settings-users.md"} | [
0.049634143710136414,
-0.024037659168243408,
-0.08500013500452042,
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0.03633290156722069,
0.056039560586214066,
0.0045394496992230415,
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-0.025260942056775093,
0.06740907579660416,
-0.027962667867541313,
0.0633949488401413,
-0.... |
8fc768c3-b01c-4407-869c-77bf7d77244a | The first line of the result is the password. The second line is the corresponding SHA256 hash.
For compatibility with MySQL clients, password can be specified in double SHA1 hash. Place it in
password_double_sha1_hex
element.
For example,
<password_double_sha1_hex>08b4a0f1de6ad37da17359e592c8d74788a83... | {"source_file": "settings-users.md"} | [
0.023688271641731262,
0.007481034379452467,
-0.0892031192779541,
-0.011944587342441082,
-0.0923243910074234,
0.021595533937215805,
0.059386130422353745,
-0.008774341084063053,
0.026798149570822716,
-0.00824548676609993,
-0.031777217984199524,
0.00333762145601213,
0.16842304170131683,
-0.07... |
3f3276b2-0805-43f0-ae18-4c037ceb703e | All results of DNS requests are cached until the server restarts.
Examples
To open access for user from any network, specify:
xml
<ip>::/0</ip>
:::note
It's insecure to open access from any network unless you have a firewall properly configured or the server is not directly connected to Internet.
:::
To open ... | {"source_file": "settings-users.md"} | [
-0.0067260535433888435,
-0.029557043686509132,
-0.04075374826788902,
0.015832606703042984,
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-0.02885512262582779,
0.03186978027224541,
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0.018229065462946892,
-0.011851388029754162,
-0.04249221086502075,
0.048758089542388916,
-0.0030807803850620985,
... |
587f336c-939f-4196-a94e-42f7d29dc054 | description: 'Settings at the query-level'
sidebar_label: 'Query-level Session Settings'
slug: /operations/settings/query-level
title: 'Query-level Session Settings'
doc_type: 'reference'
Overview {#overview}
There are multiple ways to run statements with specific settings.
Settings are configured in layers, and ... | {"source_file": "settings-query-level.md"} | [
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d66f250b-16ad-41b4-a5da-239a9793b61d | Using SQL to apply a setting to a user directly {#using-sql-to-apply-a-setting-to-a-user-directly}
This creates the user
ingester
with the setting
async_inset = 1
:
sql
CREATE USER ingester
IDENTIFIED WITH sha256_hash BY '7e099f39b84ea79559b3e85ea046804e63725fd1f46b37f281276aae20f86dc3'
-- highlight-next-line
SE... | {"source_file": "settings-query-level.md"} | [
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0.11640607565641403,
-0.0285... |
a3691309-b679-4979-82c3-9884e7f26907 | │ CREATE USER ingester IDENTIFIED WITH sha256_password SETTINGS PROFILE log_ingest │
│ CREATE SETTINGS PROFILE default │
highlight-next-line
│ CREATE SETTINGS PROFILE log_ingest SETTINGS async_insert = true │
│ CREATE SETTINGS PROFILE readonly ... | {"source_file": "settings-query-level.md"} | [
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0.12377601116895676,
-0.0482... |
02b9f4a7-ab51-40bb-b9f9-089980a14460 | description: 'Controlling behavior on server CPU overload.'
sidebar_label: 'Server overload'
slug: /operations/settings/server-overload
title: 'Server overload'
doc_type: 'reference'
Server overload
Overview {#overview}
Sometimes server can become overloaded due to different reasons. In order to determine the c... | {"source_file": "server-overload.md"} | [
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0.018273258581757545,
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-0.04... |
551f952e-0908-4e32-bbc9-00b020ac7841 | title: 'Format Settings'
sidebar_label: 'Format Settings'
slug: /operations/settings/formats
toc_max_heading_level: 2
description: 'Settings which control input and output formats.'
doc_type: 'reference'
import ExperimentalBadge from '@theme/badges/ExperimentalBadge';
import BetaBadge from '@theme/badges/BetaBadge'... | {"source_file": "settings-formats.md"} | [
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0.04389245808124542,
0.00365... |
36d8b2e3-5353-44ce-8d66-2d043cca040f | iso
- ISO output format.
ClickHouse output date and time in
ISO 8601
YYYY-MM-DDThh:mm:ssZ
format. For example,
2019-08-20T10:18:56Z
. Note that output is in UTC (
Z
means UTC).
unix_timestamp
- Unix timestamp output format.
ClickHouse output date and time in
Unix timestamp
format. For example
15662... | {"source_file": "settings-formats.md"} | [
-0.0000843217785586603,
0.029668087139725685,
-0.01918070577085018,
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0.029710158705711365,
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-0.05465332791209221,
-0.0... |
bdd9d951-c64d-4147-ae38-c288b9cf344b | format_csv_delimiter {#format_csv_delimiter}
The character to be considered as a delimiter in CSV data. If setting with a string, a string has to have a length of 1.
format_csv_null_representation {#format_csv_null_representation}
Custom NULL representation in CSV format
format_custom_escaping_rule {#format... | {"source_file": "settings-formats.md"} | [
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0.06957819312810898,
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0.023522794246673584,
-... |
b76e3e68-7f7d-45bc-84dd-d2b2cdc2fe7d | format_schema_message_name {#format_schema_message_name}
Define the name of the required message in the schema defined in
format_schema
.
To maintain compatibility with the legacy format_schema format (
file_name:message_name
):
- If
format_schema_message_name
is not specified, the message name is inferred from th... | {"source_file": "settings-formats.md"} | [
0.016447532922029495,
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0.05044986307621002,
0.... |
d28eece1-49a8-4287-bf47-42d7678e5dc9 | If both
input_format_allow_errors_num
and
input_format_allow_errors_ratio
are exceeded, ClickHouse throws an exception.
input_format_allow_errors_ratio {#input_format_allow_errors_ratio}
Sets the maximum percentage of errors allowed when reading from text formats (CSV, TSV, etc.).
The percentage of errors is ... | {"source_file": "settings-formats.md"} | [
0.03378579393029213,
-0.06808596849441528,
-0.10641200840473175,
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-0.061580922454595566,
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0.0025136193726211786,
-0.03532785549759865,
0.008004489354789257,
0.046389367431402206,
0.00927317887544632,
0.07204464077949524,
-0.01... |
3fee7788-ea68-4e15-97dc-8d7f7aa7af27 | If it is set true, \r will be allowed at end of line not followed by
input_format_csv_allow_variable_number_of_columns {#input_format_csv_allow_variable_number_of_columns}
Ignore extra columns in CSV input (if file has more columns than expected) and treat missing fields in CSV input as default values
input_fo... | {"source_file": "settings-formats.md"} | [
0.0361744686961174,
0.03635608032345772,
-0.07943318784236908,
0.019881296902894974,
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0.037320636212825775,
-0.043585628271102905,
-0.028052400797605515,
0.04900800436735153,
0.... |
7adf3a07-e511-4493-ba22-79fa6f39ca20 | Ignore extra columns in CustomSeparated input (if file has more columns than expected) and treat missing fields in CustomSeparated input as default values
input_format_custom_detect_header {#input_format_custom_detect_header}
Automatically detect header with names and types in CustomSeparated format
input_forma... | {"source_file": "settings-formats.md"} | [
-0.01987028867006302,
0.03689298406243324,
-0.0410829558968544,
0.05907003581523895,
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0.0006064536282792687,
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0.04976975917816162,
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0.01233616005629301,
0.040625736117362976,
-0.05936495587229729,
0.019643303006887436,
-0.0204... |
3208f8e5-18b8-41e8-bc49-86c6bffb3444 | Disabled by default.
input_format_json_compact_allow_variable_number_of_columns {#input_format_json_compact_allow_variable_number_of_columns}
Allow variable number of columns in rows in JSONCompact/JSONCompactEachRow input formats.
Ignore extra columns in rows with more columns than expected and treat missing col... | {"source_file": "settings-formats.md"} | [
0.04174462705850601,
-0.029510922729969025,
-0.05728234350681305,
0.0776883140206337,
-0.03533894196152687,
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-0.11314134299755096,
-0.0330054946243763,
-0.0633850023150444,
-0.030764129012823105,
0.045274097472429276,
-0.03782512620091438,
-0.002815725514665246,
0.013... |
e4e8c68d-04a2-45c1-b29f-6c2fbbb8ecde | Example:
sql
SET input_format_json_infer_incomplete_types_as_strings = 1, input_format_json_try_infer_named_tuples_from_objects = 1;
DESCRIBE format(JSONEachRow, '{"obj" : {"a" : [1,2,3], "b" : "hello", "c" : null, "d" : {}, "e" : []}}');
SELECT * FROM format(JSONEachRow, '{"obj" : {"a" : [1,2,3], "b" : "hello", "c" ... | {"source_file": "settings-formats.md"} | [
0.006698837038129568,
-0.0023645346518605947,
-0.006191618274897337,
0.01533501222729683,
-0.071711465716362,
0.01724119484424591,
0.0013479318004101515,
-0.020516710355877876,
-0.09110283106565475,
-0.030646048486232758,
-0.04288512095808983,
-0.027586044743657112,
-0.002763827331364155,
... |
451ff275-1ae0-4075-98bb-af0ea64d497b | Enabled by default.
input_format_json_read_objects_as_strings {#input_format_json_read_objects_as_strings}
Allow parsing JSON objects as strings in JSON input formats.
Example:
sql
SET input_format_json_read_objects_as_strings = 1;
CREATE TABLE test (id UInt64, obj String, date Date) ENGINE=Memory();
INSERT I... | {"source_file": "settings-formats.md"} | [
0.020855605602264404,
-0.01995181106030941,
0.020424801856279373,
0.08644822239875793,
-0.05960557237267494,
0.05601141229271889,
-0.07461339235305786,
0.008202873170375824,
-0.055891331285238266,
-0.000432132015703246,
0.017077885568141937,
0.007768379058688879,
0.04734203964471817,
-0.03... |
fdfc2049-83a7-495d-a0a8-5f76c2d9b750 | Enabled by default.
input_format_max_block_size_bytes {#input_format_max_block_size_bytes}
Limits the size of the blocks formed during data parsing in input formats in bytes. Used in row based input formats when block is formed on ClickHouse side.
0 means no limit in bytes.
input_format_max_bytes_to_read_for_sc... | {"source_file": "settings-formats.md"} | [
0.029712432995438576,
-0.04206809028983116,
-0.12647244334220886,
-0.04463322088122368,
-0.016755301505327225,
-0.043090321123600006,
-0.06744097918272018,
0.07615205645561218,
-0.08387431502342224,
0.039205390959978104,
-0.009818091988563538,
0.012328652665019035,
0.04594052582979202,
-0.... |
67474121-9e37-4b22-9a27-c82fef646948 | input_format_orc_reader_time_zone_name {#input_format_orc_reader_time_zone_name}
The time zone name for ORC row reader, the default ORC row reader's time zone is GMT.
input_format_orc_row_batch_size {#input_format_orc_row_batch_size}
Batch size when reading ORC stripes.
input_format_orc_skip_columns_with_un... | {"source_file": "settings-formats.md"} | [
0.004308922681957483,
-0.014689789153635502,
-0.05931233987212181,
-0.06367216259241104,
-0.026415150612592697,
-0.05830790475010872,
-0.0520307682454586,
-0.006884568836539984,
-0.10595855116844177,
0.01874389313161373,
-0.03341537341475487,
-0.031241022050380707,
-0.0441800132393837,
-0.... |
71709653-2d7d-48f9-b725-ceb12a811774 | Max block size for parquet reader.
input_format_parquet_memory_high_watermark {#input_format_parquet_memory_high_watermark}
Approximate memory limit for Parquet reader v3. Limits how many row groups or columns can be read in parallel. When reading multiple files in one query, the limit is on total memory usage ac... | {"source_file": "settings-formats.md"} | [
-0.01044425182044506,
-0.00537351006641984,
-0.04801442101597786,
-0.07344289124011993,
-0.06919534504413605,
-0.03867197781801224,
0.000254363170824945,
0.05710629001259804,
-0.027002405375242233,
0.045093704015016556,
-0.062108784914016724,
0.07864866405725479,
-0.003634754568338394,
-0.... |
0f1a0758-68fd-41fe-9656-51879a5a78d4 | Path of the file used to record errors while reading text formats (CSV, TSV).
input_format_skip_unknown_fields {#input_format_skip_unknown_fields}
Enables or disables skipping insertion of extra data.
When writing data, ClickHouse throws an exception if input data contain columns that do not exist in the target... | {"source_file": "settings-formats.md"} | [
-0.01661999337375164,
0.009669998660683632,
-0.019233338534832,
0.05786123499274254,
-0.020247409120202065,
-0.00034565289388410747,
-0.035173989832401276,
0.03218703344464302,
-0.082180455327034,
-0.01715516485273838,
-0.010660224594175816,
-0.02796035259962082,
0.0732613280415535,
-0.065... |
af095c39-1a5d-49c8-b9cd-06743cb20e8d | input_format_tsv_crlf_end_of_line {#input_format_tsv_crlf_end_of_line}
If it is set true, file function will read TSV format with \r\n instead of \n.
input_format_tsv_detect_header {#input_format_tsv_detect_header}
Automatically detect header with names and types in TSV format
input_format_tsv_empty_as_defa... | {"source_file": "settings-formats.md"} | [
-0.01650240272283554,
0.0429413765668869,
-0.02180302143096924,
-0.012997771613299847,
-0.021803777664899826,
0.007060956675559282,
0.008504783734679222,
0.07413916289806366,
-0.07224563509225845,
0.07427246123552322,
-0.038490086793899536,
-0.028749635443091393,
0.017290867865085602,
-0.0... |
4cd0bd14-6682-4369-aec5-497321da0bca | JSONCompactEachRowWithNamesAndTypes
JSONCompactStringsEachRowWithNamesAndTypes
RowBinaryWithNamesAndTypes
CustomSeparatedWithNamesAndTypes
Possible values:
0 — Disabled.
1 — Enabled.
insert_distributed_one_random_shard {#insert_distributed_one_random_shard}
Enables or disables random shard inser... | {"source_file": "settings-formats.md"} | [
0.0091860955581069,
-0.039091840386390686,
-0.02831925079226494,
-0.01726437360048294,
-0.0890546590089798,
-0.06843629479408264,
-0.03721577674150467,
-0.10107088088989258,
0.04738742485642433,
-0.004513739142566919,
0.06168897822499275,
-0.0077365124598145485,
0.1504811942577362,
-0.0309... |
b9a4390c-a76d-435b-9572-8f98444312e0 | Use signed integers for dictionary indexes in Arrow format
output_format_avro_codec {#output_format_avro_codec}
Compression codec used for output. Possible values: 'null', 'deflate', 'snappy', 'zstd'.
output_format_avro_rows_in_file {#output_format_avro_rows_in_file}
Max rows in a file (if permitted by storag... | {"source_file": "settings-formats.md"} | [
0.012674704194068909,
0.036554478108882904,
-0.10926811397075653,
-0.022166594862937927,
-0.050987359136343,
-0.04734942689538002,
0.011506897397339344,
0.025380592793226242,
-0.09788496047258377,
0.003277992829680443,
-0.018594680353999138,
0.018525345250964165,
0.03643341362476349,
-0.02... |
e309f802-4cff-4918-a4d1-fdf93ccf5e8d | Enabled by default.
output_format_json_map_as_array_of_tuples {#output_format_json_map_as_array_of_tuples}
Serialize maps columns as JSON arrays of tuples.
Disabled by default.
output_format_json_named_tuples_as_objects {#output_format_json_named_tuples_as_objects}
Serialize named tuple columns as JSON ob... | {"source_file": "settings-formats.md"} | [
0.06012817099690437,
0.04268937185406685,
-0.017583690583705902,
0.027707666158676147,
-0.046723444014787674,
-0.03079385496675968,
-0.09700371325016022,
-0.03184288367629051,
-0.0761851891875267,
-0.050480641424655914,
0.010534322820603848,
0.035555098205804825,
-0.03176654875278473,
-0.0... |
86f21c0e-0fa5-4d61-b6a6-ae54633795e0 | "rows": 3,
"statistics":
{
"elapsed": 0.003648093,
"rows_read": 3,
"bytes_read": 24
}
}
```
When
output_format_json_quote_denormals = 1
, the query returns:
```json
{
"meta":
[
{
"name": "divide(area, period... | {"source_file": "settings-formats.md"} | [
-0.012658420018851757,
0.06193516403436661,
-0.050592925399541855,
0.052005525678396225,
-0.04063720256090164,
-0.059842683374881744,
-0.03476785495877266,
0.03579822927713394,
-0.012455681338906288,
-0.014627893455326557,
0.01183559000492096,
-0.06568339467048645,
-0.007131374906748533,
-... |
b8f19b85-3d90-486a-9db2-a1778d86551a | output_format_orc_dictionary_key_size_threshold {#output_format_orc_dictionary_key_size_threshold}
For a string column in ORC output format, if the number of distinct values is greater than this fraction of the total number of non-null rows, turn off dictionary encoding. Otherwise dictionary encoding is enabled
o... | {"source_file": "settings-formats.md"} | [
0.032815128564834595,
0.003645004006102681,
-0.09411358833312988,
-0.056794971227645874,
-0.0320444330573082,
-0.028960809111595154,
-0.04297493398189545,
-0.030133184045553207,
-0.05957714468240738,
0.0521390400826931,
0.016203956678509712,
-0.03575682267546654,
0.04475713148713112,
-0.05... |
a4bf7f34-a285-466f-be2b-094c4c690e58 | output_format_parquet_datetime_as_uint32 {#output_format_parquet_datetime_as_uint32}
Write DateTime values as raw unix timestamp (read back as UInt32), instead of converting to milliseconds (read back as DateTime64(3)).
output_format_parquet_enum_as_byte_array {#output_format_parquet_enum_as_byte_array}
Write... | {"source_file": "settings-formats.md"} | [
0.04192446917295456,
0.03151506185531616,
-0.11402635276317596,
-0.08921381086111069,
-0.09706444293260574,
-0.08245538175106049,
-0.017718248069286346,
0.06332194805145264,
-0.08820149302482605,
0.03264012560248375,
-0.055599093437194824,
-0.0828784927725792,
-0.025149550288915634,
-0.047... |
2a6d421a-e671-468b-b36f-24d3aad2af50 | Display column names in the footer if there are many table rows.
Possible values:
0 — No column names are displayed in the footer.
1 — Column names are displayed in the footer if row count is greater than or equal to the threshold value set by
output_format_pretty_display_footer_column_names_min_rows
(50 by d... | {"source_file": "settings-formats.md"} | [
-0.025472259148955345,
-0.009464475326240063,
-0.060434479266405106,
0.009881049394607544,
-0.006003322545439005,
-0.012740653939545155,
-0.05352583900094032,
0.05584027245640755,
0.0120076360180974,
0.007375352084636688,
0.011678311973810196,
-0.036952342838048935,
0.0694350153207779,
-0.... |
8c558a8f-858a-4683-9cc0-d45e6d08bc3a | output_format_pretty_grid_charset {#output_format_pretty_grid_charset}
Charset for printing grid borders. Available charsets: ASCII, UTF-8 (default one).
output_format_pretty_highlight_digit_groups {#output_format_pretty_highlight_digit_groups}
If enabled and if output is a terminal, highlight every digit cor... | {"source_file": "settings-formats.md"} | [
0.028722966089844704,
0.051379408687353134,
-0.09577708691358566,
-0.005605535581707954,
0.011374185793101788,
-0.01336150337010622,
-0.006811763625591993,
0.030376344919204712,
-0.06760004907846451,
0.003689424367621541,
0.013555659912526608,
-0.03704133629798889,
0.038800809532403946,
-0... |
6e174e00-b04d-4842-9edf-d5fb1ff5ca14 | output_format_pretty_squash_consecutive_ms {#output_format_pretty_squash_consecutive_ms}
Wait for the next block for up to specified number of milliseconds and squash it to the previous before writing.
This avoids frequent output of too small blocks, but still allows to display data in a streaming fashion.
output... | {"source_file": "settings-formats.md"} | [
0.009578271768987179,
0.0013747644843533635,
-0.06375417858362198,
-0.014539951458573341,
0.014233664609491825,
0.00033383164554834366,
-0.10275688767433167,
0.018716437742114067,
-0.060899585485458374,
0.00006793081411160529,
0.05450951308012009,
-0.05983547866344452,
-0.020208753645420074,... |
e6456528-58bc-4c39-84fe-8820febb897d | When enabled, ClickHouse will provide exact value for rows_before_aggregation statistic, represents the number of rows read before aggregatio
schema_inference_hints {#schema_inference_hints}
The list of column names and types to use as hints in schema inference for formats without schema.
Example:
Query:
sql
d... | {"source_file": "settings-formats.md"} | [
-0.03765895590186119,
-0.0630728006362915,
-0.05971038341522217,
0.07534848898649216,
-0.01867462694644928,
0.04575905203819275,
-0.02721177414059639,
0.01506123784929514,
-0.05901298671960831,
-0.012337831780314445,
0.041247449815273285,
-0.049926307052373886,
-0.04247940331697464,
-0.015... |
3596f790-12c9-4b0c-9ac3-8a0ff90e7d70 | description: 'Settings which restrict query complexity.'
sidebar_label: 'Restrictions on query complexity'
sidebar_position: 59
slug: /operations/settings/query-complexity
title: 'Restrictions on query complexity'
doc_type: 'reference'
Restrictions on query complexity
Overview {#overview}
As part of the
settin... | {"source_file": "query-complexity.md"} | [
-0.008539756760001183,
0.008341302163898945,
-0.03721470385789871,
0.0477834977209568,
0.004929983522742987,
-0.09468682110309601,
-0.04688524082303047,
-0.0418679304420948,
-0.082684725522995,
-0.015885328873991966,
0.014935619197785854,
0.05875232443213463,
0.002207654295489192,
-0.10512... |
a9ec11d0-99bf-4478-82ef-12335354ae4d | | Setting | Short description |
|----------------------------------... | {"source_file": "query-complexity.md"} | [
0.020583847537636757,
0.07698195427656174,
0.027160516008734703,
-0.016157325357198715,
-0.050988487899303436,
0.0817311480641365,
0.018184084445238113,
0.04741803556680679,
0.02959914319217205,
-0.07189784198999405,
0.016076531261205673,
-0.04202035069465637,
-0.012262421660125256,
-0.065... |
04d46b05-ec91-47c7-9431-d9b9c8bf29a9 | |
max_bytes_before_external_group_by
| Enables or disables execution of
GROUP BY
clauses in external memory. |
|
max_bytes_ratio_before_external_group_by
| The ratio of available memory that is allowed for
GRO... | {"source_file": "query-complexity.md"} | [
-0.02946413867175579,
-0.02394688129425049,
-0.05686970800161362,
0.0022897247690707445,
0.010484525002539158,
-0.05116680637001991,
-0.0628754198551178,
0.08997135609388351,
-0.007105999160557985,
0.03561404347419739,
0.016195418313145638,
0.1361066848039627,
0.040970560163259506,
-0.0436... |
b086b5f5-cfd5-4b63-8ce3-9530bb2a8cc1 | max_execution_time
but only applied on leaf nodes for distributed or remote queries. |
|
timeout_overflow_mode_leaf
| Sets what happens when the query in leaf node run longer than
max_execution_time_leaf
. ... | {"source_file": "query-complexity.md"} | [
0.043862465769052505,
0.004903689026832581,
-0.1114007830619812,
0.06531240791082382,
0.05960802361369133,
-0.0823090523481369,
-0.07958591729402542,
0.059848006814718246,
-0.003519653342664242,
0.03378218412399292,
0.028413724154233932,
0.03818875551223755,
0.04030716419219971,
-0.1074037... |
78fd58de-3fbb-4da5-b933-7981ed4d73bf | |
max_ast_elements
| The maximum number of elements in a query syntactic tree. |
|
max_rows_in_set
| The maximum... | {"source_file": "query-complexity.md"} | [
-0.0036698810290545225,
-0.02264518290758133,
-0.03363960608839989,
-0.026858827099204063,
0.009061620570719242,
-0.050381552428007126,
0.021755149587988853,
0.08186084032058716,
-0.009649432264268398,
-0.00861357245594263,
-0.024490296840667725,
0.11266531050205231,
0.12536899745464325,
-... |
71eae1ce-503d-4d37-996f-f12505eed906 | |
join_overflow_mode
| Defines what action ClickHouse performs when any of the following join limits is reached. |
|
max_partitions_per_insert_block
| Limits the maximum number of ... | {"source_file": "query-complexity.md"} | [
-0.01901228167116642,
-0.05350470915436745,
-0.05836845189332962,
0.0017925914144143462,
-0.02458643727004528,
-0.07111500203609467,
0.03570806607604027,
0.08266550302505493,
-0.014110884629189968,
-0.012882585637271404,
0.007679400034248829,
0.05288514867424965,
0.05282384902238846,
-0.05... |
9fc01c5d-167f-4f30-a06b-6700a87c505f | Obsolete settings {#obsolete-settings}
:::note
The following settings are obsolete
:::
max_pipeline_depth {#max-pipeline-depth}
Maximum pipeline depth. It Corresponds to the number of transformations that each
data block goes through during query processing. Counted within the limits of a
single server. If the ... | {"source_file": "query-complexity.md"} | [
-0.00036002244451083243,
0.009108969010412693,
-0.03291558474302292,
-0.019008377566933632,
-0.062133707106113434,
-0.0681772455573082,
-0.0885428711771965,
0.0657159760594368,
-0.0422462597489357,
-0.02397044189274311,
-0.00625709118321538,
-0.0038870254065841436,
0.01422970276325941,
-0.... |
f8376925-eff7-42d3-a6c9-7ffc23b6c1f3 | description: 'Settings for MergeTree which are in
system.merge_tree_settings
'
slug: /operations/settings/merge-tree-settings
title: 'MergeTree tables settings'
doc_type: 'reference'
import ExperimentalBadge from '@theme/badges/ExperimentalBadge';
import BetaBadge from '@theme/badges/BetaBadge';
import SettingsInf... | {"source_file": "merge-tree-settings.md"} | [
0.05420548468828201,
-0.06235922500491142,
0.012272875756025314,
-0.006980848964303732,
-0.009206368587911129,
-0.041135165840387344,
-0.03947926312685013,
0.047043196856975555,
-0.06632295250892639,
0.06467248499393463,
0.015875795856118202,
0.018908971920609474,
0.011449497193098068,
-0.... |
02252549-be69-47cf-aa95-17bc85b71c3c | Also allows enabling such merges to happen automatically in the background
with settings
min_age_to_force_merge_seconds
,
min_age_to_force_merge_on_partition_only
and
enable_replacing_merge_with_cleanup_for_min_age_to_force_merge
.
allow_experimental_reverse_key {#allow_experimental_reverse_key}
Enables s... | {"source_file": "merge-tree-settings.md"} | [
0.01765093021094799,
-0.01417215634137392,
0.0625203400850296,
-0.022730719298124313,
-0.09924843907356262,
-0.039587557315826416,
-0.05517061799764633,
0.06930182874202728,
-0.011677420698106289,
0.05966944247484207,
0.03943150117993355,
0.08292049169540405,
-0.019958563148975372,
-0.0217... |
a7937956-606b-44ba-8f2b-566919d1f49b | Always copy data instead of hardlinking during mutations/replaces/detaches
and so on.
apply_patches_on_merge {#apply_patches_on_merge}
If true patch parts are applied on merges
assign_part_uuids {#assign_part_uuids}
When enabled, a unique part identifier will be assigned for every new part.
Before enablin... | {"source_file": "merge-tree-settings.md"} | [
-0.07077459990978241,
-0.05224444717168808,
-0.07147591561079025,
0.026153428480029106,
-0.029899654909968376,
-0.10183923691511154,
-0.0307295061647892,
-0.0004848901298828423,
-0.0859869122505188,
-0.011021909303963184,
0.0663837268948555,
0.029253864660859108,
0.03321937099099159,
-0.07... |
47476e19-3a74-41c3-a079-2698104fb7f4 | cleanup_delay_period {#cleanup_delay_period}
Minimum period to clean old queue logs, blocks hashes and parts.
cleanup_delay_period_random_add {#cleanup_delay_period_random_add}
Add uniformly distributed value from 0 to x seconds to cleanup_delay_period
to avoid thundering herd effect and subsequent DoS of Zoo... | {"source_file": "merge-tree-settings.md"} | [
0.050798166543245316,
0.04505708068609238,
-0.034317050129175186,
0.03713629022240639,
0.04141481965780258,
-0.12541258335113525,
-0.010986451990902424,
-0.035696499049663544,
-0.024418115615844727,
0.08144017308950424,
0.017047639936208725,
0.04832857474684715,
0.001988806761801243,
-0.05... |
c82b1c6c-0461-4b98-a750-c558f25e0627 | as well, but has effect on all MergeTree family members. Similar to the
option
lightweight_mutation_projection_mode
, it is also part level.
Possible values:
-
ignore
-
throw
-
drop
-
rebuild
default_compression_codec {#default_compression_codec}
Specifies the default compression codec to be used if non... | {"source_file": "merge-tree-settings.md"} | [
-0.054902106523513794,
-0.019800260663032532,
-0.006700567901134491,
-0.01198341604322195,
0.061429768800735474,
-0.09853670746088028,
-0.0659334808588028,
-0.027595845982432365,
0.0026401460636407137,
0.0029153076466172934,
0.08436780422925949,
0.051794346421957016,
0.014089105650782585,
... |
79c6bc42-bca4-4e47-9d7b-a6d9f0c5c069 | Possible values:
-
true
-
false
enable_mixed_granularity_parts {#enable_mixed_granularity_parts}
Enables or disables transitioning to control the granule size with the
index_granularity_bytes
setting. Before version 19.11, there was only the
index_granularity
setting for restricting granule size. The
inde... | {"source_file": "merge-tree-settings.md"} | [
0.0007083392702043056,
-0.007374470122158527,
0.027919672429561615,
-0.019299302250146866,
0.02641698531806469,
-0.06702668219804764,
-0.01707763411104679,
0.01747211255133152,
-0.08006700128316879,
-0.022420445457100868,
0.05021720379590988,
0.01960158534348011,
-0.029558898881077766,
-0.... |
d260d2a4-e6bd-4f94-8d07-c44041cc7662 | The excluded skip indexes will still be built and stored by an explicit
MATERIALIZE INDEX
query or during INSERTs depending on
the
materialize_skip_indexes_on_insert
session setting.
Example:
```sql
CREATE TABLE tab
(
a UInt64,
b UInt64,
INDEX idx_a a TYPE minmax,
INDEX idx_b b TYPE set(3)
)
ENGINE = MergeTree ... | {"source_file": "merge-tree-settings.md"} | [
0.02050883136689663,
0.042883265763521194,
0.01229736115783453,
0.053227853029966354,
0.017433954402804375,
-0.0002850875025615096,
0.04232904687523842,
-0.032529208809137344,
-0.019935954362154007,
0.0025394344702363014,
0.05686493217945099,
0.023834139108657837,
0.07537127286195755,
-0.1... |
a2972242-5ed2-46eb-86a1-78ee4bf4c0d4 | If the number of inactive parts in a single partition more than the
inactive_parts_to_throw_insert
value,
INSERT
is interrupted with the
following error:
"Too many inactive parts (N). Parts cleaning are processing significantly
slower than inserts" exception."
Possible values:
- Any positive integer.
inde... | {"source_file": "merge-tree-settings.md"} | [
0.009054042398929596,
-0.016062503680586815,
0.03475216403603554,
0.013859993778169155,
0.0202329158782959,
-0.11978721618652344,
0.02373056858778,
0.025393959134817123,
-0.03334520757198334,
-0.017576059326529503,
0.038034260272979736,
0.03656177222728729,
0.017294494435191154,
-0.0831874... |
4cf82a38-b5a6-4e47-a65d-6a7416a45aaa | Compression encoding used by marks, marks are small enough and cached, so
the default compression is ZSTD(3).
materialize_skip_indexes_on_merge {#materialize_skip_indexes_on_merge}
When enabled, merges build and store skip indices for new parts.
Otherwise they can be created/stored by explicit
MATERIALIZE INDE... | {"source_file": "merge-tree-settings.md"} | [
-0.03588799759745598,
0.032444871962070465,
0.03424609452486038,
0.0416504368185997,
0.012062815949320793,
-0.054448202252388,
-0.02011372335255146,
0.03453739359974861,
-0.004774090833961964,
-0.05433094501495361,
0.008661453612148762,
0.022530874237418175,
0.03886710852384567,
-0.0147752... |
13b8258d-7dc3-41ed-9ea6-27098032ca56 | max_cleanup_delay_period {#max_cleanup_delay_period}
Maximum period to clean old queue logs, blocks hashes and parts.
max_compress_block_size {#max_compress_block_size}
The maximum size of blocks of uncompressed data before compressing for writing
to a table. You can also specify this setting in the global se... | {"source_file": "merge-tree-settings.md"} | [
0.01686333306133747,
-0.038738615810871124,
-0.012170406989753246,
-0.0020316140726208687,
-0.039072103798389435,
-0.08598218113183975,
-0.08799277991056442,
0.021866830065846443,
0.021712755784392357,
0.02730359509587288,
0.044583696871995926,
0.05105743184685707,
0.013294672593474388,
-0... |
909c96c9-46e7-4d01-98ae-6d08a28ae5f9 | max_files_to_modify_in_alter_columns {#max_files_to_modify_in_alter_columns}
Do not apply ALTER if number of files for modification(deletion, addition)
is greater than this setting.
Possible values:
Any positive integer.
Default value: 75
max_files_to_remove_in_alter_columns {#max_files_to_remove_in_alt... | {"source_file": "merge-tree-settings.md"} | [
-0.0003814368974417448,
-0.04919995740056038,
-0.06225566938519478,
-0.01284872554242611,
0.03696790337562561,
-0.06937261670827866,
-0.07569094002246857,
0.05199446156620979,
0.02976645529270172,
0.07085723429918289,
0.03744759410619736,
0.02784375287592411,
-0.02394910156726837,
-0.03538... |
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