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e25ca139cd
With this commit, SQL functions LIKE and MATCH and their variants can
work with non-const needle arguments. E.g.
create table tab
(id UInt32, haystack String, needle String)
engine = MergeTree()
order by id;
insert into tab values
(1, 'Hello', '%ell%')
(2, 'World', '%orl%')
select id, haystack, needle, like(haystack, needle)
from tab;
For that, methods vectorVector() and vectorFixedVector() were added to
MatchImpl. The existing code for const needles has an optimization where
the compiled regexp is cached. The new code expects a different needle
per row and consequently does not cache the regexp.
37 lines
1.7 KiB
SQL
37 lines
1.7 KiB
SQL
drop table if exists non_const_needle;
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create table non_const_needle
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(id UInt32, haystack String, needle String)
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engine = MergeTree()
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order by id;
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-- 1 - 33: LIKE-syntax, 34-37: re2-syntax
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insert into non_const_needle values (1, 'Hello', '') (2, 'Hello', '%') (3, 'Hello', '%%') (4, 'Hello', '%%%') (5, 'Hello', '%_%') (6, 'Hello', '_') (7, 'Hello', '_%') (8, 'Hello', '%_') (9, 'Hello', 'H%o') (10, 'hello', 'H%0') (11, 'hello', 'h%o') (12, 'Hello', 'h%o') (13, 'OHello', '%lhell%') (14, 'OHello', '%hell%') (15, 'hEllo', '%HEL%') (16, 'abcdef', '%aBc%def%') (17, 'ABCDDEF', '%abc%def%') (18, 'Abc\nDef', '%abc%def%') (19, 'abc\ntdef', '%abc%def%') (20, 'abct\ndef', '%abc%dEf%') (21, 'abc\n\ndeF', '%abc%def%') (22, 'abc\n\ntdef', '%abc%deF%') (23, 'Abc\nt\ndef', '%abc%def%') (24, 'abct\n\ndef', '%abc%def%') (25, 'ab\ndef', '%Abc%def%') (26, 'aBc\nef', '%ABC%DEF%') (27, 'ёЁё', 'Ё%Ё') (28, 'ощщЁё', 'Щ%Ё') (29, 'ощЩЁё', '%Щ%Ё') (30, 'Щущпандер', '%щп%е%') (31, 'Щущпандер', '%щП%е%') (32, 'ощщЁё', '%щ%') (33, 'ощЩЁё', '%ё%') (34, 'Hello', '.*') (35, 'Hello', '.*ell.*') (36, 'Hello', 'o$') (37, 'Hello', 'hE.*lO');
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select 'LIKE';
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select id, haystack, needle, like(haystack, needle)
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from non_const_needle
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order by id;
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select 'NOT LIKE';
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select id, haystack, needle, not like(haystack, needle)
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from non_const_needle
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order by id;
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select 'ILIKE';
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select id, haystack, needle, ilike(haystack, needle)
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from non_const_needle
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order by id;
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select 'NOT ILIKE';
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select id, haystack, needle, not ilike(haystack, needle)
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from non_const_needle
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order by id;
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select 'MATCH';
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select id, haystack, needle, match(haystack, needle)
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from non_const_needle
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order by id;
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drop table if exists non_const_needle;
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