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[feature](function) support initcap string function (#13193)

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support `initcap` string function
This commit is contained in:
luozenglin
2022-10-13 21:31:44 +08:00
committed by GitHub
parent cb300b0b39
commit de4315c1c5
10 changed files with 165 additions and 2 deletions
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21
be/src/exprs/string_functions.cpp
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@ -350,6 +350,27 @@ StringVal StringFunctions::upper(FunctionContext* context, const StringVal& str)
return result;
}
StringVal StringFunctions::initcap(FunctionContext* context, const StringVal& str) {
if (str.is_null) {
return StringVal::null();
}
StringVal result(context, str.len);
simd::VStringFunctions::to_lower(str.ptr, str.len, result.ptr);
bool need_capitalize = true;
for (int64_t i = 0; i < str.len; ++i) {
if (!::isalnum(result.ptr[i])) {
need_capitalize = true;
} else if (need_capitalize) {
result.ptr[i] = ::toupper(result.ptr[i]);
need_capitalize = false;
}
}
return result;
}
StringVal StringFunctions::reverse(FunctionContext* context, const StringVal& str) {
if (str.is_null) {
return StringVal::null();