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838596c7a4
Function to count number of substring occurrences in the string: - in case of needle is multi char - counts non-intersecting substrings - the code is based on position helpers. The following new functions is available: - countSubstrings() - countSubstringsCaseInsensitive() - countSubstringsCaseInsensitiveUTF8() v0: substringCount() v2: - add substringCountCaseInsensitiveUTF8 - improve tests - fix coding style issues - fix multichar needle v3: rename to countSubstrings (by analogy with countEqual())
139 lines
6.6 KiB
SQL
139 lines
6.6 KiB
SQL
--
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-- countSubstrings
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--
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select '';
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select '# countSubstrings';
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select '';
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select 'CountSubstringsImpl::constantConstant';
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select 'CountSubstringsImpl::constantConstantScalar';
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select 'empty';
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select countSubstrings('', '.');
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select countSubstrings('', '');
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select countSubstrings('.', '');
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select 'char';
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select countSubstrings('foobar.com', '.');
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select countSubstrings('www.foobar.com', '.');
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select countSubstrings('.foobar.com.', '.');
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select 'word';
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select countSubstrings('foobar.com', 'com');
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select countSubstrings('com.foobar', 'com');
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select countSubstrings('foo.com.bar', 'com');
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select countSubstrings('com.foobar.com', 'com');
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select countSubstrings('com.foo.com.bar.com', 'com');
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select 'intersect';
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select countSubstrings('aaaa', 'aa');
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select '';
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select 'CountSubstringsImpl::vectorVector';
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select countSubstrings(toString(number), toString(number)) from numbers(1);
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select countSubstrings(concat(toString(number), '000111'), toString(number)) from numbers(1);
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select countSubstrings(concat(toString(number), '000111001'), toString(number)) from numbers(1);
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select 'intersect', countSubstrings(concat(toString(number), '0000000'), '00') from numbers(1) format CSV;
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select '';
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select 'CountSubstringsImpl::constantVector';
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select countSubstrings('100', toString(number)) from numbers(3);
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select countSubstrings('0100', toString(number)) from numbers(1);
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select countSubstrings('010000', toString(number)) from numbers(1);
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select 'intersect', countSubstrings('00000000', repeat(toString(number), 2)) from numbers(1) format CSV;
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select '';
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select 'CountSubstringsImpl::vectorConstant';
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select countSubstrings(toString(number), '1') from system.numbers limit 3 offset 9;
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select countSubstrings(concat(toString(number), '000111'), '1') from numbers(1);
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select countSubstrings(concat(toString(number), '000111001'), '1') from numbers(1);
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select 'intersect', countSubstrings(repeat(toString(number), 8), '00') from numbers(1) format CSV;
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--
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-- countSubstringsCaseInsensitive
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--
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select '';
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select '# countSubstringsCaseInsensitive';
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select '';
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select 'CountSubstringsImpl::constantConstant';
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select 'CountSubstringsImpl::constantConstantScalar';
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select 'char';
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select countSubstringsCaseInsensitive('aba', 'B');
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select countSubstringsCaseInsensitive('bab', 'B');
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select countSubstringsCaseInsensitive('BaBaB', 'b');
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select 'word';
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select countSubstringsCaseInsensitive('foobar.com', 'COM');
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select countSubstringsCaseInsensitive('com.foobar', 'COM');
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select countSubstringsCaseInsensitive('foo.com.bar', 'COM');
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select countSubstringsCaseInsensitive('com.foobar.com', 'COM');
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select countSubstringsCaseInsensitive('com.foo.com.bar.com', 'COM');
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select 'intersect';
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select countSubstringsCaseInsensitive('aaaa', 'AA');
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select '';
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select 'CountSubstringsImpl::vectorVector';
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select countSubstringsCaseInsensitive(upper(char(number)), lower(char(number))) from numbers(100) where number = 0x41; -- A
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select countSubstringsCaseInsensitive(concat(toString(number), 'aaa111'), char(number)) from numbers(100) where number = 0x41;
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select countSubstringsCaseInsensitive(concat(toString(number), 'aaa111aa1'), char(number)) from numbers(100) where number = 0x41;
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select '';
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select 'CountSubstringsImpl::constantVector';
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select countSubstringsCaseInsensitive('aab', char(number)) from numbers(100) where number >= 0x41 and number <= 0x43; -- A..C
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select countSubstringsCaseInsensitive('abaa', char(number)) from numbers(100) where number = 0x41;
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select countSubstringsCaseInsensitive('abaaaa', char(number)) from numbers(100) where number = 0x41;
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select '';
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select 'CountSubstringsImpl::vectorConstant';
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select countSubstringsCaseInsensitive(char(number), 'a') from numbers(100) where number >= 0x41 and number <= 0x43;
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--
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-- countSubstringsCaseInsensitiveUTF8
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--
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select '';
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select '# countSubstringsCaseInsensitiveUTF8';
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select '';
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select 'CountSubstringsImpl::constantConstant';
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select 'CountSubstringsImpl::constantConstantScalar';
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select 'char';
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select countSubstringsCaseInsensitiveUTF8('фуу', 'Ф');
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select countSubstringsCaseInsensitiveUTF8('ФуФ', 'ф');
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select countSubstringsCaseInsensitiveUTF8('ФуФуФ', 'ф');
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select 'word';
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select countSubstringsCaseInsensitiveUTF8('подстрока.рф', 'РФ');
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select countSubstringsCaseInsensitiveUTF8('рф.подстрока', 'рф');
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select countSubstringsCaseInsensitiveUTF8('подстрока.рф.подстрока', 'РФ');
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select countSubstringsCaseInsensitiveUTF8('рф.подстрока.рф', 'рф');
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select countSubstringsCaseInsensitiveUTF8('рф.подстрока.рф.подстрока.рф', 'РФ');
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select 'intersect';
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select countSubstringsCaseInsensitiveUTF8('яяяя', 'ЯЯ');
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select '';
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select 'CountSubstringsImpl::vectorVector';
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-- can't use any char, since this will not make valid UTF8
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-- for the haystack we use number as-is, for needle we just add dependency from number to go to vectorVector code
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select countSubstringsCaseInsensitiveUTF8(upperUTF8(concat(char(number), 'я')), lowerUTF8(concat(substringUTF8(char(number), 2), 'Я'))) from numbers(100) where number = 0x41; -- A
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select countSubstringsCaseInsensitiveUTF8(concat(toString(number), 'ЯЯЯ111'), concat(substringUTF8(char(number), 2), 'я')) from numbers(100) where number = 0x41; -- A
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select countSubstringsCaseInsensitiveUTF8(concat(toString(number), 'яяя111яя1'), concat(substringUTF8(char(number), 2), 'Я')) from numbers(100) where number = 0x41; -- A
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select 'intersect', countSubstringsCaseInsensitiveUTF8(concat(toString(number), 'яяяяяяяя'), concat(substringUTF8(char(number), 2), 'Яя')) from numbers(100) where number = 0x41 format CSV; -- A
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select '';
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select 'CountSubstringsImpl::constantVector';
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select countSubstringsCaseInsensitiveUTF8('ЯЯb', concat(substringUTF8(char(number), 2), 'я')) from numbers(100) where number = 0x41; -- A
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select countSubstringsCaseInsensitiveUTF8('ЯbЯЯ', concat(substringUTF8(char(number), 2), 'я')) from numbers(100) where number = 0x41; -- A
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select countSubstringsCaseInsensitiveUTF8('ЯbЯЯЯЯ', concat(substringUTF8(char(number), 2), 'я')) from numbers(100) where number = 0x41; -- A
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select 'intersect', countSubstringsCaseInsensitiveUTF8('ЯЯЯЯЯЯЯЯ', concat(substringUTF8(char(number), 2), 'Яя')) from numbers(100) where number = 0x41 format CSV; -- A
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select '';
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select 'CountSubstringsImpl::vectorConstant';
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select countSubstringsCaseInsensitiveUTF8(concat(char(number), 'я'), 'Я') from numbers(100) where number = 0x41; -- A
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select countSubstringsCaseInsensitiveUTF8(concat(char(number), 'б'), 'Я') from numbers(100) where number = 0x41; -- A
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select 'intersect', countSubstringsCaseInsensitiveUTF8(concat(char(number), repeat('я', 8)), 'яЯ') from numbers(100) where number = 0x41 format CSV; -- A
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