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This commit is contained in:
Leonid Fedorov
2022-01-21 16:43:49 +00:00
parent 6b6411229f
commit 04752ec546
1376 changed files with 393460 additions and 412662 deletions
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112
utils/funcexp/func_substr.cpp
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@ -16,10 +16,10 @@
MA 02110-1301, USA. */
/****************************************************************************
* $Id: func_substr.cpp 3923 2013-06-19 21:43:06Z bwilkinson $
*
*
****************************************************************************/
* $Id: func_substr.cpp 3923 2013-06-19 21:43:06Z bwilkinson $
*
*
****************************************************************************/
#include <string>
using namespace std;
@ -34,74 +34,68 @@ using namespace rowgroup;
#include "joblisttypes.h"
using namespace joblist;
namespace funcexp
{
CalpontSystemCatalog::ColType Func_substr::operationType(FunctionParm& fp, CalpontSystemCatalog::ColType& resultType)
CalpontSystemCatalog::ColType Func_substr::operationType(FunctionParm& fp,
CalpontSystemCatalog::ColType& resultType)
{
// operation type is not used by this functor
return fp[0]->data()->resultType();
// operation type is not used by this functor
return fp[0]->data()->resultType();
}
std::string Func_substr::getStrVal(rowgroup::Row& row,
FunctionParm& fp,
bool& isNull,
std::string Func_substr::getStrVal(rowgroup::Row& row, FunctionParm& fp, bool& isNull,
execplan::CalpontSystemCatalog::ColType& ct)
{
CHARSET_INFO* cs = ct.getCharset();
CHARSET_INFO* cs = ct.getCharset();
const string& str = fp[0]->data()->getStrVal(row, isNull);
const string& str = fp[0]->data()->getStrVal(row, isNull);
if (isNull)
return "";
int64_t strLen = str.length();
const char* strptr = str.c_str();
const char* strend = strptr + strLen;
uint32_t strChars = cs->numchars(strptr, strend);
int64_t start = fp[1]->data()->getIntVal(row, isNull) - 1;
if (isNull)
return "";
if (start < -1) // negative pos, beginning from end
start += strChars + 1;
if (start < 0 || strChars <= start)
{
return "";
}
int64_t length;
if (fp.size() == 3)
{
length = fp[2]->data()->getIntVal(row, isNull);
if (isNull)
return "";
int64_t strLen = str.length();
const char* strptr = str.c_str();
const char* strend = strptr + strLen;
uint32_t strChars = cs->numchars(strptr, strend);
int64_t start = fp[1]->data()->getIntVal(row, isNull) - 1;
if (isNull)
return "";
if (start < -1) // negative pos, beginning from end
start += strChars + 1;
if (start < 0 || strChars <= start)
{
return "";
}
return "";
if (length < 1)
return "";
}
else
{
length = strChars - start;
}
int64_t length;
if (fp.size() == 3)
{
length = fp[2]->data()->getIntVal(row, isNull);
if (isNull)
return "";
if (length < 1)
return "";
}
else
{
length = strChars - start;
}
// start is now number of chars into str to start the substring
// We convert it to number of bytes:
start = cs->charpos(strptr, strend, start);
// Convert length to bytes as well
length = cs->charpos(strptr + start, strend, length);
if ((start < 0) || (start + 1 > strLen))
return "";
// start is now number of chars into str to start the substring
// We convert it to number of bytes:
start = cs->charpos(strptr, strend, start);
// Convert length to bytes as well
length= cs->charpos(strptr + start, strend, length);
if ((start < 0) || (start + 1 > strLen))
return "";
if (start == 0 && strLen == length)
return str;
if (start == 0 && strLen == length)
return str;
length = std::min(length, strLen - start);
length= std::min(length, strLen - start);
std::string ret(strptr + start, length);
return ret;
std::string ret(strptr + start, length);
return ret;
}
} // namespace funcexp
} // namespace funcexp
// vim:ts=4 sw=4: