ClickHouse/tests/queries/0_stateless/01246_extractAllGroups.sql

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-- error cases
SELECT extractAllGroups(); --{serverError 42} not enough arguments
SELECT extractAllGroups('hello'); --{serverError 42} not enough arguments
SELECT extractAllGroups('hello', 123); --{serverError 43} invalid argument type
SELECT extractAllGroups(123, 'world'); --{serverError 43} invalid argument type
SELECT extractAllGroups('hello world', '((('); --{serverError 427} invalid re
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SELECT extractAllGroups('hello world', materialize('\\w+')); --{serverError 44} non-const needle
SELECT '0 groups, zero matches';
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SELECT extractAllGroups('hello world', '\\w+'); -- { serverError 36 }
SELECT '1 group, multiple matches, String and FixedString';
SELECT extractAllGroups('hello world', '(\\w+)');
SELECT extractAllGroups('hello world', CAST('(\\w+)' as FixedString(5)));
SELECT extractAllGroups(CAST('hello world' AS FixedString(12)), '(\\w+)');
SELECT extractAllGroups(CAST('hello world' AS FixedString(12)), CAST('(\\w+)' as FixedString(5)));
SELECT extractAllGroups(materialize(CAST('hello world' AS FixedString(12))), '(\\w+)');
SELECT extractAllGroups(materialize(CAST('hello world' AS FixedString(12))), CAST('(\\w+)' as FixedString(5)));
SELECT 'mutiple groups, multiple matches';
SELECT extractAllGroups('abc=111, def=222, ghi=333 "jkl mno"="444 foo bar"', '("[^"]+"|\\w+)=("[^"]+"|\\w+)');
SELECT 'big match';
SELECT
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length(haystack), length(matches[1]), length(matches), arrayMap((x) -> length(x), arrayMap(x -> x[1], matches))
FROM (
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SELECT
repeat('abcdefghijklmnopqrstuvwxyz', number * 10) AS haystack,
extractAllGroups(haystack, '(abcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyzabcdefghijklmnopqrstuvwxyz)') AS matches
FROM numbers(3)
);
SELECT 'lots of matches';
SELECT
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length(haystack), length(matches[1]), length(matches), arrayReduce('sum', arrayMap((x) -> length(x), arrayMap(x -> x[1], matches)))
FROM (
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SELECT
repeat('abcdefghijklmnopqrstuvwxyz', number * 10) AS haystack,
extractAllGroups(haystack, '(\\w)') AS matches
FROM numbers(3)
);
SELECT 'lots of groups';
SELECT
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length(haystack), length(matches[1]), length(matches), arrayMap((x) -> length(x), arrayMap(x -> x[1], matches))
FROM (
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SELECT
repeat('abcdefghijklmnopqrstuvwxyz', number * 10) AS haystack,
extractAllGroups(haystack, repeat('(\\w)', 100)) AS matches
FROM numbers(3)
);