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MCOL-3536 collation

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This commit is contained in:
David Hall
2020-06-04 16:15:06 -05:00
parent 889094a23d
commit bacd81d32a
11 changed files with 349 additions and 552 deletions
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43
utils/funcexp/func_right.cpp
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@ -51,42 +51,33 @@ CalpontSystemCatalog::ColType Func_right::operationType(FunctionParm& fp, Calpon
std::string Func_right::getStrVal(rowgroup::Row& row,
FunctionParm& fp,
bool& isNull,
execplan::CalpontSystemCatalog::ColType&)
execplan::CalpontSystemCatalog::ColType& type)
{
const string& tstr = fp[0]->data()->getStrVal(row, isNull);
CHARSET_INFO* cs = type.getCharset();
// The original string
const string& src = fp[0]->data()->getStrVal(row, isNull);
if (isNull)
return "";
if (src.empty() || src.length() == 0)
return src;
// binLen represents the number of bytes in src
size_t binLen = src.length();
const char* pos = src.c_str();
const char* end = pos + binLen;
int64_t pos = fp[1]->data()->getIntVal(row, isNull);
if (isNull)
size_t trimLength = fp[1]->data()->getUintVal(row, isNull);
if (isNull || trimLength <= 0)
return "";
if (pos == -1) // pos == 0
return "";
size_t start = cs->numchars(pos, end); // Here, start is number of characters in src
if (start <= trimLength)
return src;
start = cs->charpos(pos, end, start - trimLength); // Here, start becomes number of bytes into src to start copying
size_t strwclen = utf8::idb_mbstowcs(0, tstr.c_str(), 0) + 1;
//wchar_t wcbuf[strwclen];
wchar_t* wcbuf = new wchar_t[strwclen];
strwclen = utf8::idb_mbstowcs(wcbuf, tstr.c_str(), strwclen);
wstring str(wcbuf, strwclen);
if ( (unsigned) pos >= strwclen )
pos = strwclen;
wstring out = str.substr(strwclen - pos, strwclen);
size_t strmblen = utf8::idb_wcstombs(0, out.c_str(), 0) + 1;
//char outbuf[strmblen];
char* outbuf = new char[strmblen];
strmblen = utf8::idb_wcstombs(outbuf, out.c_str(), strmblen);
std::string ret(outbuf, strmblen);
delete [] outbuf;
delete [] wcbuf;
std::string ret(pos+start, binLen-start);
return ret;
}
} // namespace funcexp
// vim:ts=4 sw=4: