mirror of
https://github.com/ClickHouse/ClickHouse.git
synced 2024-12-14 18:32:29 +00:00
32 lines
1.1 KiB
SQL
32 lines
1.1 KiB
SQL
|
|
DROP TABLE IF EXISTS bloom_filter;
|
|
|
|
CREATE TABLE bloom_filter
|
|
(
|
|
id UInt64,
|
|
s String,
|
|
INDEX tok_bf (s, lower(s)) TYPE tokenbf_v1(512, 3, 0) GRANULARITY 1
|
|
) ENGINE = MergeTree() ORDER BY id SETTINGS index_granularity = 8;
|
|
|
|
insert into bloom_filter select number, 'yyy,uuu' from numbers(1024);
|
|
insert into bloom_filter select number+2000, 'abc,def,zzz' from numbers(8);
|
|
insert into bloom_filter select number+3000, 'yyy,uuu' from numbers(1024);
|
|
insert into bloom_filter select number+3000, 'abcdefzzz' from numbers(1024);
|
|
|
|
set max_rows_to_read = 16;
|
|
|
|
SELECT max(id) FROM bloom_filter WHERE hasToken(s, 'abc');
|
|
SELECT max(id) FROM bloom_filter WHERE hasToken(s, 'def');
|
|
SELECT max(id) FROM bloom_filter WHERE hasToken(s, 'zzz');
|
|
|
|
-- invert result
|
|
-- this does not work as expected, reading more rows that it should
|
|
-- SELECT max(id) FROM bloom_filter WHERE NOT hasToken(s, 'yyy');
|
|
|
|
-- accessing to many rows
|
|
SELECT max(id) FROM bloom_filter WHERE hasToken(s, 'yyy'); -- { serverError 158 }
|
|
|
|
-- this syntax is not supported by tokenbf
|
|
SELECT max(id) FROM bloom_filter WHERE hasToken(s, 'zzz') == 1; -- { serverError 158 }
|
|
|
|
DROP TABLE bloom_filter; |