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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())
25 lines
583 B
C++
25 lines
583 B
C++
#include "FunctionsStringSearch.h"
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#include "FunctionFactory.h"
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#include "CountSubstringsImpl.h"
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namespace DB
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{
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namespace
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{
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struct NameCountSubstringsCaseInsensitiveUTF8
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{
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static constexpr auto name = "countSubstringsCaseInsensitiveUTF8";
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};
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using FunctionCountSubstringsCaseInsensitiveUTF8 = FunctionsStringSearch<CountSubstringsImpl<PositionCaseInsensitiveUTF8>, NameCountSubstringsCaseInsensitiveUTF8>;
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}
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void registerFunctionCountSubstringsCaseInsensitiveUTF8(FunctionFactory & factory)
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{
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factory.registerFunction<FunctionCountSubstringsCaseInsensitiveUTF8>();
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}
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}
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