thevar1able/ClickHouse
1
0
Fork 0
mirror of https://github.com/ClickHouse/ClickHouse.git synced 2024-11-27 01:51:59 +00:00
Code Issues Packages Projects Releases Wiki Activity

add docs for create bmEstimate functions

Browse Source
This commit is contained in:
凌涛 2023-04-26 17:55:40 +08:00
parent 58de2dae26
commit 935656c23a
1 changed files with 1 additions and 1 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

2
docs/en/engines/table-engines/mergetree-family/mergetree.md
View File

@ -430,7 +430,7 @@ Syntax: `bloom_filter([false_positive])`
#### N-gram Bloom Filter
Stores a [Bloom filter](https://en.wikipedia.org/wiki/Bloom_filter) that contains all n-grams from a block of data. Only works with datatypes: [String](/docs/en/sql-reference/data-types/string.md), [FixedString](/docs/en/sql-reference/data-types/fixedstring.md) and [Map](/docs/en/sql-reference/data-types/map.md). Can be used for optimization of `EQUALS`, `LIKE` and `IN` expressions.
Stores a [Bloom filter](https://en.wikipedia.org/wiki/Bloom_filter) that contains all n-grams from a block of data. Only works with datatypes: [String](/docs/en/sql-reference/data-types/string.md), [FixedString](/docs/en/sql-reference/data-types/fixedstring.md) and [Map](/docs/en/sql-reference/data-types/map.md). Can be used for optimization of `EQUALS`, `LIKE` and `IN` expressions.
Syntax: `ngrambf_v1(n, size_of_bloom_filter_in_bytes, number_of_hash_functions, random_seed)`